{"id":664,"date":"2023-01-28T02:23:03","date_gmt":"2023-01-28T02:23:03","guid":{"rendered":"https:\/\/www.gislxz.com\/?p=664"},"modified":"2023-02-03T04:46:46","modified_gmt":"2023-02-03T04:46:46","slug":"java%e5%9f%ba%e7%a1%80%ef%bc%884","status":"publish","type":"post","link":"https:\/\/www.gislxz.com\/index.php\/2023\/01\/28\/java%e5%9f%ba%e7%a1%80%ef%bc%884\/","title":{"rendered":"Java\u57fa\u7840\uff084)"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u591a\u7ebf\u7a0b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Thread\u7c7b<\/h3>\n\n\n\n<p>Java\u662f\u901a\u8fc7java.lang.Thread \u7c7b\u6765\u4ee3\u8868\u7ebf\u7a0b\u7684\u3002<br>\u6309\u7167\u9762\u5411\u5bf9\u8c61\u7684\u601d\u60f3\uff0cThread\u7c7b\u5e94\u8be5\u63d0\u4f9b\u4e86\u5b9e\u73b0\u591a\u7ebf\u7a0b\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n<p>\u591a\u7ebf\u7a0b\u7684\u5b9e\u73b0\u65b9\u6848\u4e00\uff1a\u7ee7\u627fThread\u7c7b<br>\u5b9a\u4e49\u4e00\u4e2a\u5b50\u7c7bMyThread\u7ee7\u627f\u7ebf\u7a0b\u7c7bjava.lang.Thread\uff0c\u91cd\u5199run()\u65b9\u6cd5<br>\u521b\u5efaMyThread\u7c7b\u7684\u5bf9\u8c61<br>\u8c03\u7528\u7ebf\u7a0b\u5bf9\u8c61\u7684start()\u65b9\u6cd5\u542f\u52a8\u7ebf\u7a0b\uff08\u542f\u52a8\u540e\u8fd8\u662f\u6267\u884crun\u65b9\u6cd5\u7684\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n   \u76ee\u6807\uff1a\u591a\u7ebf\u7a0b\u7684\u521b\u5efa\u65b9\u5f0f\u4e00\uff1a\u7ee7\u627fThread\u7c7b\u5b9e\u73b0\u3002\n *\/\npublic class ThreadDemo1 {\n    public static void main(String&#91;] args) {\n        \/\/ 3\u3001new\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u5bf9\u8c61\n        Thread t = new MyThread();\n        \/\/ 4\u3001\u8c03\u7528start\u65b9\u6cd5\u542f\u52a8\u7ebf\u7a0b\uff08\u6267\u884c\u7684\u8fd8\u662frun\u65b9\u6cd5\uff09\n        t.start();\n\n        for (int i = 0; i &lt; 5; i++) {\n            System.out.println(\"\u4e3b\u7ebf\u7a0b\u6267\u884c\u8f93\u51fa\uff1a\" + i);\n        }\n\n    }\n}\n\n\/**\n   1\u3001\u5b9a\u4e49\u4e00\u4e2a\u7ebf\u7a0b\u7c7b\u7ee7\u627fThread\u7c7b\n *\/\nclass MyThread extends Thread{\n    \/**\n       2\u3001\u91cd\u5199run\u65b9\u6cd5\uff0c\u91cc\u9762\u662f\u5b9a\u4e49\u7ebf\u7a0b\u4ee5\u540e\u8981\u5e72\u5565\n     *\/\n    @Override\n    public void run() {\n        for (int i = 0; i &lt; 5; i++) {\n            System.out.println(\"\u5b50\u7ebf\u7a0b\u6267\u884c\u8f93\u51fa\uff1a\" + i);\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u65b9\u5f0f\u4e00\u4f18\u7f3a\u70b9\uff1a<br>\u4f18\u70b9\uff1a\u7f16\u7801\u7b80\u5355<br>\u7f3a\u70b9\uff1a\u7ebf\u7a0b\u7c7b\u5df2\u7ecf\u7ee7\u627fThread\uff0c\u65e0\u6cd5\u7ee7\u627f\u5176\u4ed6\u7c7b\uff0c\u4e0d\u5229\u4e8e\u6269\u5c55\u3002 <\/p>\n\n\n\n<p>1\u3001\u4e3a\u4ec0\u4e48\u4e0d\u76f4\u63a5\u8c03\u7528\u4e86run\u65b9\u6cd5\uff0c\u800c\u662f\u8c03\u7528start\u542f\u52a8\u7ebf\u7a0b\u3002<br>\u76f4\u63a5\u8c03\u7528run\u65b9\u6cd5\u4f1a\u5f53\u6210\u666e\u901a\u65b9\u6cd5\u6267\u884c\uff0c\u6b64\u65f6\u76f8\u5f53\u4e8e\u8fd8\u662f\u5355\u7ebf\u7a0b\u6267\u884c\u3002<br>\u53ea\u6709\u8c03\u7528start\u65b9\u6cd5\u624d\u662f\u542f\u52a8\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\u6267\u884c\u3002<br>2\u3001\u628a\u4e3b\u7ebf\u7a0b\u4efb\u52a1\u653e\u5728\u5b50\u7ebf\u7a0b\u4e4b\u524d\u4e86\u3002<br>\u8fd9\u6837\u4e3b\u7ebf\u7a0b\u4e00\u76f4\u662f\u5148\u8dd1\u5b8c\u7684\uff0c\u76f8\u5f53\u4e8e\u662f\u4e00\u4e2a\u5355\u7ebf\u7a0b\u7684\u6548\u679c\u4e86\u3002<\/p>\n\n\n\n<p>\u591a\u7ebf\u7a0b\u7684\u5b9e\u73b0\u65b9\u6848\u4e8c\uff1a\u5b9e\u73b0Runnable\u63a5\u53e3<br>\u5b9a\u4e49\u4e00\u4e2a\u7ebf\u7a0b\u4efb\u52a1\u7c7bMyRunnable\u5b9e\u73b0Runnable\u63a5\u53e3\uff0c\u91cd\u5199run()\u65b9\u6cd5<br>\u521b\u5efaMyRunnable\u4efb\u52a1\u5bf9\u8c61<br>\u628aMyRunnable\u4efb\u52a1\u5bf9\u8c61\u4ea4\u7ed9Thread\u5904\u7406\u3002<br>\u8c03\u7528\u7ebf\u7a0b\u5bf9\u8c61\u7684start()\u65b9\u6cd5\u542f\u52a8\u7ebf\u7a0b<\/p>\n\n\n\n<p>Thread\u7684\u6784\u9020\u5668<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u6784\u9020\u5668<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;Thread(String&nbsp;name)<\/td><td>\u53ef\u4ee5\u4e3a\u5f53\u524d\u7ebf\u7a0b\u6307\u5b9a\u540d\u79f0<\/td><\/tr><tr><td>public&nbsp;Thread(Runnable&nbsp;target)<\/td><td>\u5c01\u88c5Runnable\u5bf9\u8c61\u6210\u4e3a\u7ebf\u7a0b\u5bf9\u8c61<\/td><\/tr><tr><td>public&nbsp;Thread(Runnable&nbsp;target&nbsp;\uff0cString&nbsp;name&nbsp;)<\/td><td>\u5c01\u88c5Runnable\u5bf9\u8c61\u6210\u4e3a\u7ebf\u7a0b\u5bf9\u8c61\uff0c\u5e76\u6307\u5b9a\u7ebf\u7a0b\u540d\u79f0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n   \u76ee\u6807\uff1a\u5b66\u4f1a\u7ebf\u7a0b\u7684\u521b\u5efa\u65b9\u5f0f\u4e8c\uff0c\u7406\u89e3\u5b83\u7684\u4f18\u7f3a\u70b9\u3002\n *\/\npublic class ThreadDemo2 {\n    public static void main(String&#91;] args) {\n        \/\/ 3\u3001\u521b\u5efa\u4e00\u4e2a\u4efb\u52a1\u5bf9\u8c61\n        Runnable target = new MyRunnable();\n        \/\/ 4\u3001\u628a\u4efb\u52a1\u5bf9\u8c61\u4ea4\u7ed9Thread\u5904\u7406\n        Thread t = new Thread(target);\n        \/\/ Thread t = new Thread(target, \"1\u53f7\");\n        \/\/ 5\u3001\u542f\u52a8\u7ebf\u7a0b\n        t.start();\n\n        for (int i = 0; i &lt; 10; i++) {\n            System.out.println(\"\u4e3b\u7ebf\u7a0b\u6267\u884c\u8f93\u51fa\uff1a\" + i);\n        }\n    }\n}\n\n\/**\n   1\u3001\u5b9a\u4e49\u4e00\u4e2a\u7ebf\u7a0b\u4efb\u52a1\u7c7b \u5b9e\u73b0Runnable\u63a5\u53e3\n *\/\nclass MyRunnable  implements Runnable {\n    \/**\n       2\u3001\u91cd\u5199run\u65b9\u6cd5\uff0c\u5b9a\u4e49\u7ebf\u7a0b\u7684\u6267\u884c\u4efb\u52a1\u7684\n     *\/\n    @Override\n    public void run() {\n        for (int i = 0; i &lt; 10; i++) {\n            System.out.println(\"\u5b50\u7ebf\u7a0b\u6267\u884c\u8f93\u51fa\uff1a\" + i);\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u65b9\u5f0f\u4e8c\u4f18\u7f3a\u70b9\uff1a<br>\u4f18\u70b9\uff1a\u7ebf\u7a0b\u4efb\u52a1\u7c7b\u53ea\u662f\u5b9e\u73b0\u63a5\u53e3\uff0c\u53ef\u4ee5\u7ee7\u7eed\u7ee7\u627f\u7c7b\u548c\u5b9e\u73b0\u63a5\u53e3\uff0c\u6269\u5c55\u6027\u5f3a\u3002<br>\u7f3a\u70b9\uff1a\u7f16\u7a0b\u591a\u4e00\u5c42\u5bf9\u8c61\u5305\u88c5\uff0c\u5982\u679c\u7ebf\u7a0b\u6709\u6267\u884c\u7ed3\u679c\u662f\u4e0d\u53ef\u4ee5\u76f4\u63a5\u8fd4\u56de\u7684\u3002<\/p>\n\n\n\n<p>\u591a\u7ebf\u7a0b\u7684\u5b9e\u73b0\u65b9\u6848\u4e8c\uff1a\u5b9e\u73b0Runnable\u63a5\u53e3(\u533f\u540d\u5185\u90e8\u7c7b\u5f62\u5f0f)<br>\u53ef\u4ee5\u521b\u5efaRunnable\u7684\u533f\u540d\u5185\u90e8\u7c7b\u5bf9\u8c61\u3002<br>\u4ea4\u7ed9Thread\u5904\u7406\u3002<br>\u8c03\u7528\u7ebf\u7a0b\u5bf9\u8c61\u7684start()\u542f\u52a8\u7ebf\u7a0b\u3002\u3001<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n   \u76ee\u6807\uff1a\u5b66\u4f1a\u7ebf\u7a0b\u7684\u521b\u5efa\u65b9\u5f0f\u4e8c(\u533f\u540d\u5185\u90e8\u7c7b\u65b9\u5f0f\u5b9e\u73b0\uff0c\u8bed\u6cd5\u5f62\u5f0f)\n *\/\npublic class ThreadDemo2Other {\n    public static void main(String&#91;] args) {\n        Runnable target = new Runnable() {\n            @Override\n            public void run() {\n                for (int i = 0; i &lt; 10; i++) {\n                    System.out.println(\"\u5b50\u7ebf\u7a0b1\u6267\u884c\u8f93\u51fa\uff1a\" + i);\n                }\n            }\n        };\n        Thread t = new Thread(target);\n        t.start();\n\n        new Thread(new Runnable() {\n            @Override\n            public void run() {\n                for (int i = 0; i &lt; 10; i++) {\n                    System.out.println(\"\u5b50\u7ebf\u7a0b2\u6267\u884c\u8f93\u51fa\uff1a\" + i);\n                }\n            }\n        }).start();\n\n        new Thread(() -&gt; {\n                for (int i = 0; i &lt; 10; i++) {\n                    System.out.println(\"\u5b50\u7ebf\u7a0b3\u6267\u884c\u8f93\u51fa\uff1a\" + i);\n            }\n        }).start();\n\n        for (int i = 0; i &lt; 10; i++) {\n            System.out.println(\"\u4e3b\u7ebf\u7a0b\u6267\u884c\u8f93\u51fa\uff1a\" + i);\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u524d2\u79cd\u7ebf\u7a0b\u521b\u5efa\u65b9\u5f0f\u90fd\u5b58\u5728\u4e00\u4e2a\u95ee\u9898\uff1a<br>\u4ed6\u4eec\u91cd\u5199\u7684run\u65b9\u6cd5\u5747\u4e0d\u80fd\u76f4\u63a5\u8fd4\u56de\u7ed3\u679c\u3002<br>\u4e0d\u9002\u5408\u9700\u8981\u8fd4\u56de\u7ebf\u7a0b\u6267\u884c\u7ed3\u679c\u7684\u4e1a\u52a1\u573a\u666f\u3002<br>\u600e\u4e48\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f<br>JDK 5.0\u63d0\u4f9b\u4e86Callable\u548cFutureTask\u6765\u5b9e\u73b0\u3002<br>\u8fd9\u79cd\u65b9\u5f0f\u7684\u4f18\u70b9\u662f\uff1a\u53ef\u4ee5\u5f97\u5230\u7ebf\u7a0b\u6267\u884c\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n<p>\u591a\u7ebf\u7a0b\u7684\u5b9e\u73b0\u65b9\u6848\u4e09\uff1a\u5229\u7528Callable\u3001FutureTask\u63a5\u53e3\u5b9e\u73b0\u3002<br>1\u5f97\u5230\u4efb\u52a1\u5bf9\u8c61<br>\u00b7\u5b9a\u4e49\u7c7b\u5b9e\u73b0Callable\u63a5\u53e3\uff0c\u91cd\u5199call\u65b9\u6cd5\uff0c\u5c01\u88c5\u8981\u505a\u7684\u4e8b\u60c5\u3002<br>\u00b7\u7528FutureTask\u628aCallable\u5bf9\u8c61\u5c01\u88c5\u6210\u7ebf\u7a0b\u4efb\u52a1\u5bf9\u8c61\u3002<br>2\u628a\u7ebf\u7a0b\u4efb\u52a1\u5bf9\u8c61\u4ea4\u7ed9Thread\u5904\u7406\u3002<br>3\u8c03\u7528Thread\u7684start\u65b9\u6cd5\u542f\u52a8\u7ebf\u7a0b\uff0c\u6267\u884c\u4efb\u52a1<br>4\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\u540e\u3001\u901a\u8fc7FutureTask\u7684get\u65b9\u6cd5\u53bb\u83b7\u53d6\u4efb\u52a1\u6267\u884c\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n<p>FutureTask\u7684API<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;FutureTask&lt;&gt;(Callable&nbsp;call)<\/td><td>\u628aCallable\u5bf9\u8c61\u5c01\u88c5\u6210FutureTask\u5bf9\u8c61\u3002<\/td><\/tr><tr><td>public&nbsp;V&nbsp;get()&nbsp;throws&nbsp;Exception<\/td><td>\u83b7\u53d6\u7ebf\u7a0b\u6267\u884ccall\u65b9\u6cd5\u8fd4\u56de\u7684\u7ed3\u679c\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u65b9\u5f0f\u4e09\u4f18\u7f3a\u70b9\uff1a<br>\u4f18\u70b9\uff1a\u7ebf\u7a0b\u4efb\u52a1\u7c7b\u53ea\u662f\u5b9e\u73b0\u63a5\u53e3\uff0c\u53ef\u4ee5\u7ee7\u7eed\u7ee7\u627f\u7c7b\u548c\u5b9e\u73b0\u63a5\u53e3\uff0c\u6269\u5c55\u6027\u5f3a\u3002<br>\u53ef\u4ee5\u5728\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\u540e\u53bb\u83b7\u53d6\u7ebf\u7a0b\u6267\u884c\u7684\u7ed3\u679c\u3002<br>\u7f3a\u70b9\uff1a\u7f16\u7801\u590d\u6742\u4e00\u70b9\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.concurrent.Callable;\nimport java.util.concurrent.ExecutionException;\nimport java.util.concurrent.FutureTask;\n\n\/**\n   \u76ee\u6807\uff1a\u5b66\u4f1a\u7ebf\u7a0b\u7684\u521b\u5efa\u65b9\u5f0f\u4e09\uff1a\u5b9e\u73b0Callable\u63a5\u53e3\uff0c\u7ed3\u5408FutureTask\u5b8c\u6210\u3002\n *\/\npublic class ThreadDemo3 {\n    public static void main(String&#91;] args) {\n        \/\/ 3\u3001\u521b\u5efaCallable\u4efb\u52a1\u5bf9\u8c61\n        Callable&lt;String&gt; call = new MyCallable(100);\n        \/\/ 4\u3001\u628aCallable\u4efb\u52a1\u5bf9\u8c61 \u4ea4\u7ed9 FutureTask \u5bf9\u8c61\n        \/\/  FutureTask\u5bf9\u8c61\u7684\u4f5c\u75281\uff1a \u662fRunnable\u7684\u5bf9\u8c61\uff08\u5b9e\u73b0\u4e86Runnable\u63a5\u53e3\uff09\uff0c\u53ef\u4ee5\u4ea4\u7ed9Thread\u4e86\n        \/\/  FutureTask\u5bf9\u8c61\u7684\u4f5c\u75282\uff1a \u53ef\u4ee5\u5728\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\u4e4b\u540e\u901a\u8fc7\u8c03\u7528\u5176get\u65b9\u6cd5\u5f97\u5230\u7ebf\u7a0b\u6267\u884c\u5b8c\u6210\u7684\u7ed3\u679c\n        FutureTask&lt;String&gt; f1 = new FutureTask&lt;&gt;(call);\n        \/\/ 5\u3001\u4ea4\u7ed9\u7ebf\u7a0b\u5904\u7406\n        Thread t1 = new Thread(f1);\n        \/\/ 6\u3001\u542f\u52a8\u7ebf\u7a0b\n        t1.start();\n\n\n        Callable&lt;String&gt; call2 = new MyCallable(200);\n        FutureTask&lt;String&gt; f2 = new FutureTask&lt;&gt;(call2);\n        Thread t2 = new Thread(f2);\n        t2.start();\n\n        try {\n            \/\/ \u5982\u679cf1\u4efb\u52a1\u6ca1\u6709\u6267\u884c\u5b8c\u6bd5\uff0c\u8fd9\u91cc\u7684\u4ee3\u7801\u4f1a\u7b49\u5f85\uff0c\u76f4\u5230\u7ebf\u7a0b1\u8dd1\u5b8c\u624d\u63d0\u53d6\u7ed3\u679c\u3002\n            String rs1 = f1.get();\n            System.out.println(\"\u7b2c\u4e00\u4e2a\u7ed3\u679c\uff1a\" + rs1);\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n\n        try {\n            \/\/ \u5982\u679cf2\u4efb\u52a1\u6ca1\u6709\u6267\u884c\u5b8c\u6bd5\uff0c\u8fd9\u91cc\u7684\u4ee3\u7801\u4f1a\u7b49\u5f85\uff0c\u76f4\u5230\u7ebf\u7a0b2\u8dd1\u5b8c\u624d\u63d0\u53d6\u7ed3\u679c\u3002\n            String rs2 = f2.get();\n            System.out.println(\"\u7b2c\u4e8c\u4e2a\u7ed3\u679c\uff1a\" + rs2);\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}\n\n\/**\n    1\u3001\u5b9a\u4e49\u4e00\u4e2a\u4efb\u52a1\u7c7b \u5b9e\u73b0Callable\u63a5\u53e3  \u5e94\u8be5\u7533\u660e\u7ebf\u7a0b\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u540e\u7684\u7ed3\u679c\u7684\u6570\u636e\u7c7b\u578b\n *\/\nclass MyCallable implements Callable&lt;String&gt;{\n    private int n;\n    public MyCallable(int n) {\n        this.n = n;\n    }\n\n    \/**\n       2\u3001\u91cd\u5199call\u65b9\u6cd5\uff08\u4efb\u52a1\u65b9\u6cd5\uff09\n     *\/\n    @Override\n    public String call() throws Exception {\n        int sum = 0;\n        for (int i = 1; i &lt;= n ; i++) {\n            sum += i;\n        }\n        return \"\u5b50\u7ebf\u7a0b\u6267\u884c\u7684\u7ed3\u679c\u662f\uff1a\" + sum;\n    }\n}<\/code><\/pre>\n\n\n\n<p>Thread\u5e38\u7528API\u8bf4\u660e<br>Thread\u5e38\u7528\u65b9\u6cd5\uff1a\u83b7\u53d6\u7ebf\u7a0b\u540d\u79f0getName()\u3001\u8bbe\u7f6e\u540d\u79f0setName()\u3001\u83b7\u53d6\u5f53\u524d\u7ebf\u7a0b\u5bf9\u8c61currentThread()\u3002<br>\u81f3\u4e8eThread\u7c7b\u63d0\u4f9b\u7684\u8bf8\u5982\uff1ayield\u3001join\u3001interrupt\u3001\u4e0d\u63a8\u8350\u7684\u65b9\u6cd5 stop \u3001\u5b88\u62a4\u7ebf\u7a0b\u3001\u7ebf\u7a0b\u4f18\u5148\u7ea7\u7b49\u7ebf\u7a0b\u7684\u63a7\u5236\u65b9\u6cd5\uff0c\u5728\u5f00\u53d1\u4e2d\u5f88\u5c11\u4f7f\u7528\u3002<\/p>\n\n\n\n<p>\u5f53\u6709\u5f88\u591a\u7ebf\u7a0b\u5728\u6267\u884c\u7684\u65f6\u5019\uff0c\u6211\u4eec\u600e\u4e48\u53bb\u533a\u5206\u8fd9\u4e9b\u7ebf\u7a0b\u5462\uff1f<br>\u6b64\u65f6\u9700\u8981\u4f7f\u7528Thread\u7684\u5e38\u7528\u65b9\u6cd5\uff1agetName()\u3001setName()\u3001currentThread()\u7b49\u3002<\/p>\n\n\n\n<p>Thread\u83b7\u53d6\u548c\u8bbe\u7f6e\u7ebf\u7a0b\u540d\u79f0<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>String&nbsp;getName\u200b()<\/td><td>\u83b7\u53d6\u5f53\u524d\u7ebf\u7a0b\u7684\u540d\u79f0\uff0c\u9ed8\u8ba4\u7ebf\u7a0b\u540d\u79f0\u662fThread-\u7d22\u5f15<\/td><\/tr><tr><td>void&nbsp;setName\u200b(String&nbsp;name)<\/td><td>\u5c06\u6b64\u7ebf\u7a0b\u7684\u540d\u79f0\u66f4\u6539\u4e3a\u6307\u5b9a\u7684\u540d\u79f0\uff0c\u901a\u8fc7\u6784\u9020\u5668\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u7ebf\u7a0b\u540d\u79f0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Thread\u7c7b\u83b7\u5f97\u5f53\u524d\u7ebf\u7a0b\u7684\u5bf9\u8c61<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;static&nbsp;Thread&nbsp;currentThread()\uff1a<\/td><td>\u8fd4\u56de\u5bf9\u5f53\u524d\u6b63\u5728\u6267\u884c\u7684\u7ebf\u7a0b\u5bf9\u8c61\u7684\u5f15\u7528<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u6ce8\u610f\uff1a<br>1\u3001\u6b64\u65b9\u6cd5\u662fThread\u7c7b\u7684\u9759\u6001\u65b9\u6cd5\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528Thread\u7c7b\u8c03\u7528\u3002<br>2\u3001\u8fd9\u4e2a\u65b9\u6cd5\u662f\u5728\u54ea\u4e2a\u7ebf\u7a0b\u6267\u884c\u4e2d\u8c03\u7528\u7684\uff0c\u5c31\u4f1a\u5f97\u5230\u54ea\u4e2a\u7ebf\u7a0b\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p>Thread\u7684\u6784\u9020\u5668<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;Thread(String&nbsp;name)<\/td><td>\u53ef\u4ee5\u4e3a\u5f53\u524d\u7ebf\u7a0b\u6307\u5b9a\u540d\u79f0<\/td><\/tr><tr><td>public&nbsp;Thread(Runnable&nbsp;target)<\/td><td>\u5c01\u88c5Runnable\u5bf9\u8c61\u6210\u4e3a\u7ebf\u7a0b\u5bf9\u8c61<\/td><\/tr><tr><td>public&nbsp;Thread(Runnable&nbsp;target&nbsp;\uff0cString&nbsp;name&nbsp;)<\/td><td>\u5c01\u88c5Runnable\u5bf9\u8c61\u6210\u4e3a\u7ebf\u7a0b\u5bf9\u8c61\uff0c\u5e76\u6307\u5b9a\u7ebf\u7a0b\u540d\u79f0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Thread\u7c7b\u7684\u7ebf\u7a0b\u4f11\u7720\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;static&nbsp;void&nbsp;sleep(long&nbsp;time)<\/td><td>\u8ba9\u5f53\u524d\u7ebf\u7a0b\u4f11\u7720\u6307\u5b9a\u7684\u65f6\u95f4\u540e\u518d\u7ee7\u7eed\u6267\u884c\uff0c\u5355\u4f4d\u4e3a\u6beb\u79d2\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/MyThread.java\npublic class MyThread extends Thread{\n    public MyThread() {\n    }\n\n    public MyThread(String name) {\n        \/\/ \u4e3a\u5f53\u524d\u7ebf\u7a0b\u5bf9\u8c61\u8bbe\u7f6e\u540d\u79f0\uff0c\u9001\u7ed9\u7236\u7c7b\u7684\u6709\u53c2\u6570\u6784\u9020\u5668\u521d\u59cb\u5316\u540d\u79f0\n        super(name);\n    }\n\n    @Override\n    public void run() {\n        for (int i = 0; i &lt; 5; i++) {\n            System.out.println( Thread.currentThread().getName() + \"\u8f93\u51fa\uff1a\" + i);\n        }\n    }\n}\n\/\/ThreadDemo01.java\n\/**\n    \u76ee\u6807\uff1a\u7ebf\u7a0b\u7684API\n *\/\npublic class ThreadDemo01 {\n    \/\/ main\u65b9\u6cd5\u662f\u7531\u4e3b\u7ebf\u7a0b\u8d1f\u8d23\u8c03\u5ea6\u7684\n    public static void main(String&#91;] args) {\n        Thread t1 = new MyThread(\"1\u53f7\");\n        \/\/ t1.setName(\"1\u53f7\");\n        t1.start();\n        System.out.println(t1.getName());\n\n        Thread t2 = new MyThread(\"2\u53f7\");\n        \/\/ t2.setName(\"2\u53f7\");\n        t2.start();\n        System.out.println(t2.getName());\n\n        \/\/ \u54ea\u4e2a\u7ebf\u7a0b\u6267\u884c\u5b83\uff0c\u5b83\u5c31\u5f97\u5230\u54ea\u4e2a\u7ebf\u7a0b\u5bf9\u8c61\uff08\u5f53\u524d\u7ebf\u7a0b\u5bf9\u8c61\uff09\n        \/\/ \u4e3b\u7ebf\u7a0b\u7684\u540d\u79f0\u5c31\u53ebmain\n        Thread m = Thread.currentThread();\n        System.out.println(m.getName());\n        m.setName(\"\u6700\u725b\u7684\u7ebf\u7a0b\");\n\n        for (int i = 0; i &lt; 5; i++) {\n            System.out.println( m.getName() + \"\u8f93\u51fa\uff1a\" + i);\n        }\n    }\n}\n\/\/ThreadDemo02.java\n\/**\n    \u76ee\u6807\uff1a\u7ebf\u7a0b\u7684API\n *\/\npublic class ThreadDemo02 {\n    \/\/ main\u65b9\u6cd5\u662f\u7531\u4e3b\u7ebf\u7a0b\u8d1f\u8d23\u8c03\u5ea6\u7684\n    public static void main(String&#91;] args) throws Exception {\n        for (int i = 1; i &lt;= 5; i++) {\n            System.out.println(\"\u8f93\u51fa\uff1a\" + i);\n            if(i == 3){\n                \/\/ \u8ba9\u5f53\u524d\u7ebf\u7a0b\u8fdb\u5165\u4f11\u7720\u72b6\u6001\n                \/\/ \u6bb5\u5b50\uff1a\u9879\u76ee\u7ecf\u7406\u8ba9\u6211\u52a0\u4e0a\u8fd9\u884c\u4ee3\u7801\uff0c\u5982\u679c\u7528\u6237\u613f\u610f\u4ea4\u94b1\uff0c\u6211\u5c31\u6ce8\u91ca\u6389\u3002\n                Thread.sleep(3000);\n            }\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898<\/h3>\n\n\n\n<p>\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u64cd\u4f5c\u540c\u4e00\u4e2a\u5171\u4eab\u8d44\u6e90\u7684\u65f6\u5019\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e1a\u52a1\u5b89\u5168\u95ee\u9898\uff0c\u79f0\u4e3a\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/acount.java\npublic class Account {\n    private String cardId;\n    private double money; \/\/ \u8d26\u6237\u7684\u4f59\u989d\n\n    public Account(){\n\n    }\n\n    public Account(String cardId, double money) {\n        this.cardId = cardId;\n        this.money = money;\n    }\n\n    \/**\n       \u5c0f\u660e \u5c0f\u7ea2\n     *\/\n    public void drawMoney(double money) {\n        \/\/ 0\u3001\u5148\u83b7\u53d6\u662f\u8c01\u6765\u53d6\u94b1\uff0c\u7ebf\u7a0b\u7684\u540d\u5b57\u5c31\u662f\u4eba\u540d\n        String name = Thread.currentThread().getName();\n        \/\/ 1\u3001\u5224\u65ad\u8d26\u6237\u662f\u5426\u591f\u94b1\n        if(this.money &gt;= money){\n            \/\/ 2\u3001\u53d6\u94b1\n            System.out.println(name + \"\u6765\u53d6\u94b1\u6210\u529f\uff0c\u5410\u51fa\uff1a\" + money);\n            \/\/ 3\u3001\u66f4\u65b0\u4f59\u989d\n            this.money -= money;\n            System.out.println(name + \"\u53d6\u94b1\u540e\u5269\u4f59\uff1a\" + this.money);\n        }else {\n            \/\/ 4\u3001\u4f59\u989d\u4e0d\u8db3\n            System.out.println(name +\"\u6765\u53d6\u94b1\uff0c\u4f59\u989d\u4e0d\u8db3\uff01\");\n        }\n\n    }\n\n    public String getCardId() {\n        return cardId;\n    }\n\n    public void setCardId(String cardId) {\n        this.cardId = cardId;\n    }\n\n    public double getMoney() {\n        return money;\n    }\n\n    public void setMoney(double money) {\n        this.money = money;\n    }\n\n}\n\/\/DrawThread.java\n\/**\n   \u53d6\u94b1\u7684\u7ebf\u7a0b\u7c7b\n *\/\npublic class DrawThread extends Thread {\n    \/\/ \u63a5\u6536\u5904\u7406\u7684\u8d26\u6237\u5bf9\u8c61\n    private Account acc;\n    public DrawThread(Account acc,String name){\n        super(name);\n        this.acc = acc;\n    }\n    @Override\n    public void run() {\n        \/\/ \u5c0f\u660e \u5c0f\u7ea2\uff1a\u53d6\u94b1\n        acc.drawMoney(100000);\n    }\n}\n\/\/ThreadDemo.java\n\/**\n    \u9700\u6c42\uff1a\u6a21\u62df\u53d6\u94b1\u6848\u4f8b\u3002\n *\/\npublic class ThreadDemo {\n    public static void main(String&#91;] args) {\n        \/\/ 1\u3001\u5b9a\u4e49\u7ebf\u7a0b\u7c7b\uff0c\u521b\u5efa\u4e00\u4e2a\u5171\u4eab\u7684\u8d26\u6237\u5bf9\u8c61\n        Account acc = new Account(\"ICBC-111\", 100000);\n\n        \/\/ 2\u3001\u521b\u5efa2\u4e2a\u7ebf\u7a0b\u5bf9\u8c61\uff0c\u4ee3\u8868\u5c0f\u660e\u548c\u5c0f\u7ea2\u540c\u65f6\u8fdb\u6765\u4e86\u3002\n        new DrawThread(acc, \"\u5c0f\u660e\").start();\n        new DrawThread(acc, \"\u5c0f\u7ea2\").start();\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ebf\u7a0b\u540c\u6b65<\/h3>\n\n\n\n<p>\u7ebf\u7a0b\u540c\u6b65\u7684\u6838\u5fc3\u601d\u60f3<br>\u52a0\u9501\uff0c\u628a\u5171\u4eab\u8d44\u6e90\u8fdb\u884c\u4e0a\u9501\uff0c\u6bcf\u6b21\u53ea\u80fd\u4e00\u4e2a\u7ebf\u7a0b\u8fdb\u5165\u8bbf\u95ee\u5b8c\u6bd5\u4ee5\u540e\u89e3\u9501\uff0c\u7136\u540e\u5176\u4ed6\u7ebf\u7a0b\u624d\u80fd\u8fdb\u6765\u3002<br>\u8ba9\u591a\u4e2a\u7ebf\u7a0b\u5b9e\u73b0\u5148\u540e\u4f9d\u6b21\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\uff0c\u8fd9\u6837\u5c31\u89e3\u51b3\u4e86\u5b89\u5168\u95ee\u9898<\/p>\n\n\n\n<p>\u65b9\u6cd5\u4e00\uff1a\u540c\u6b65\u4ee3\u7801\u5757<br>\u4f5c\u7528\uff1a\u628a\u51fa\u73b0\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u7684\u6838\u5fc3\u4ee3\u7801\u7ed9\u4e0a\u9501\u3002<br>\u539f\u7406\uff1a\u6bcf\u6b21\u53ea\u80fd\u4e00\u4e2a\u7ebf\u7a0b\u8fdb\u5165\uff0c\u6267\u884c\u5b8c\u6bd5\u540e\u81ea\u52a8\u89e3\u9501\uff0c\u5176\u4ed6\u7ebf\u7a0b\u624d\u53ef\u4ee5\u8fdb\u6765\u6267\u884c\u3002<br>\u9501\u5bf9\u8c61\u8981\u6c42<br>\u7406\u8bba\u4e0a\uff1a\u9501\u5bf9\u8c61\u53ea\u8981\u5bf9\u4e8e\u5f53\u524d\u540c\u65f6\u6267\u884c\u7684\u7ebf\u7a0b\u6765\u8bf4\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u5373\u53ef\u3002<\/p>\n\n\n\n<p>\u9501\u5bf9\u8c61\u7528\u4efb\u610f\u552f\u4e00\u7684\u5bf9\u8c61\u597d\u4e0d\u597d\u5462?<br>\u4e0d\u597d\uff0c\u4f1a\u5f71\u54cd\u5176\u4ed6\u65e0\u5173\u7ebf\u7a0b\u7684\u6267\u884c\u3002<br>\u9501\u5bf9\u8c61\u7684\u89c4\u8303\u8981\u6c42|<br>\u89c4\u8303\u4e0a\uff1a\u5efa\u8bae\u4f7f\u7528\u5171\u4eab\u8d44\u6e90\u4f5c\u4e3a\u9501\u5bf9\u8c61\u3002<br>\u5bf9\u4e8e\u5b9e\u4f8b\u65b9\u6cd5\u5efa\u8bae\u4f7f\u7528this\u4f5c\u4e3a\u9501\u5bf9\u8c61\u3002<br>\u5bf9\u4e8e\u9759\u6001\u65b9\u6cd5\u5efa\u8bae\u4f7f\u7528\u5b57\u8282\u7801\uff08\u7c7b\u540d.class\uff09\u5bf9\u8c61\u4f5c\u4e3a\u9501\u5bf9\u8c61\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n    \u8d26\u6237\u7c7b\uff1a\u4f59\u989d\uff0c\u5361\u53f7\n *\/\npublic class Account {\n    private String cardId;\n    private double money; \/\/ \u4f59\u989d \u5173\u952e\u4fe1\u606f\n\n    public Account() {\n    }\n\n    public Account(String cardId, double money) {\n        this.cardId = cardId;\n        this.money = money;\n    }\n\n    public String getCardId() {\n        return cardId;\n    }\n\n    public void setCardId(String cardId) {\n        this.cardId = cardId;\n    }\n\n    public double getMoney() {\n        return money;\n    }\n\n    public void setMoney(double money) {\n        this.money = money;\n    }\n\n\/\/    \/\/ 100\u4e2a\u7ebf\u7a0b\u4eba\n\/\/    public static void run(){\n\/\/        synchronized (Account.class){\n\/\/\n\/\/        }\n\/\/    }\n\n\n    \/**\n      \u5c0f\u660e \u5c0f\u7ea2\n     *\/\n    public void drawMoney(double money) {\n        \/\/ 1\u3001\u62ff\u5230\u662f\u8c01\u6765\u53d6\u94b1\n        String name = Thread.currentThread().getName();\n        \/\/ \u540c\u6b65\u4ee3\u7801\u5757\n        \/\/ \u5c0f\u660e \u5c0f\u7ea2\n        \/\/ this == acc \u5171\u4eab\u8d26\u6237\n        synchronized (this) {\n            \/\/ 2\u3001\u5224\u65ad\u4f59\u989d\u662f\u5426\u8db3\u591f\n            if(this.money &gt;= money){\n                \/\/ \u94b1\u591f\u4e86\n                System.out.println(name+\"\u6765\u53d6\u94b1\uff0c\u5410\u51fa\uff1a\" + money);\n                \/\/ \u66f4\u65b0\u4f59\u989d\n                this.money -= money;\n                System.out.println(name+\"\u53d6\u94b1\u540e\uff0c\u4f59\u989d\u5269\u4f59\uff1a\" + this.money);\n            }else{\n                \/\/ 3\u3001\u4f59\u989d\u4e0d\u8db3\n                System.out.println(name+\"\u6765\u53d6\u94b1\uff0c\u4f59\u989d\u4e0d\u8db3\uff01\");\n            }\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u65b9\u6cd5\u4e8c \u540c\u6b65\u65b9\u6cd5<\/p>\n\n\n\n<p>\u4f5c\u7528\uff1a\u628a\u51fa\u73b0\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u7684\u6838\u5fc3\u65b9\u6cd5\u7ed9\u4e0a\u9501\u3002<br>\u539f\u7406\uff1a\u6bcf\u6b21\u53ea\u80fd\u4e00\u4e2a\u7ebf\u7a0b\u8fdb\u5165\uff0c\u6267\u884c\u5b8c\u6bd5\u4ee5\u540e\u81ea\u52a8\u89e3\u9501\uff0c\u5176\u4ed6\u7ebf\u7a0b\u624d\u53ef\u4ee5\u8fdb\u6765\u6267\u884c\u3002<br>\u540c\u6b65\u65b9\u6cd5\u5e95\u5c42\u539f\u7406<br>\u540c\u6b65\u65b9\u6cd5\u5176\u5b9e\u5e95\u5c42\u4e5f\u662f\u6709\u9690\u5f0f\u9501\u5bf9\u8c61\u7684\uff0c\u53ea\u662f\u9501\u7684\u8303\u56f4\u662f\u6574\u4e2a\u65b9\u6cd5\u4ee3\u7801\u3002<br>\u5982\u679c\u65b9\u6cd5\u662f\u5b9e\u4f8b\u65b9\u6cd5\uff1a\u540c\u6b65\u65b9\u6cd5\u9ed8\u8ba4\u7528this\u4f5c\u4e3a\u7684\u9501\u5bf9\u8c61\u3002\u4f46\u662f\u4ee3\u7801\u8981\u9ad8\u5ea6\u9762\u5411\u5bf9\u8c61\uff01<br>\u5982\u679c\u65b9\u6cd5\u662f\u9759\u6001\u65b9\u6cd5\uff1a\u540c\u6b65\u65b9\u6cd5\u9ed8\u8ba4\u7528\u7c7b\u540d.class\u4f5c\u4e3a\u7684\u9501\u5bf9\u8c61\u3002<br>\u540c\u6b65\u4ee3\u7801\u5757\u9501\u7684\u8303\u56f4\u66f4\u5c0f\uff0c\u540c\u6b65\u65b9\u6cd5\u9501\u7684\u8303\u56f4\u66f4\u5927\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n    \u8d26\u6237\u7c7b\uff1a\u4f59\u989d\uff0c\u5361\u53f7\n *\/\npublic class Account {\n    private String cardId;\n    private double money; \/\/ \u4f59\u989d \u5173\u952e\u4fe1\u606f\n\n    public Account() {\n    }\n\n    public Account(String cardId, double money) {\n        this.cardId = cardId;\n        this.money = money;\n    }\n\n    public String getCardId() {\n        return cardId;\n    }\n\n    public void setCardId(String cardId) {\n        this.cardId = cardId;\n    }\n\n    public double getMoney() {\n        return money;\n    }\n\n    public void setMoney(double money) {\n        this.money = money;\n    }\n\n    \/**\n      \u5c0f\u660e \u5c0f\u7ea2\n       this == acc\n     *\/\n    public synchronized void drawMoney(double money) {\n        \/\/ 1\u3001\u62ff\u5230\u662f\u8c01\u6765\u53d6\u94b1\n        String name = Thread.currentThread().getName();\n        \/\/ 2\u3001\u5224\u65ad\u4f59\u989d\u662f\u5426\u8db3\u591f\n        \/\/ \u5c0f\u660e  \u5c0f\u7ea2\n        if(this.money &gt;= money){\n            \/\/ \u94b1\u591f\u4e86\n            System.out.println(name+\"\u6765\u53d6\u94b1\uff0c\u5410\u51fa\uff1a\" + money);\n            \/\/ \u66f4\u65b0\u4f59\u989d\n            this.money -= money;\n            System.out.println(name+\"\u53d6\u94b1\u540e\uff0c\u4f59\u989d\u5269\u4f59\uff1a\" + this.money);\n        }else{\n            \/\/ 3\u3001\u4f59\u989d\u4e0d\u8db3\n            System.out.println(name+\"\u6765\u53d6\u94b1\uff0c\u4f59\u989d\u4e0d\u8db3\uff01\");\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u65b9\u6cd5\u4e09 Lock\u9501<\/p>\n\n\n\n<p>\u4e3a\u4e86\u66f4\u6e05\u6670\u7684\u8868\u8fbe\u5982\u4f55\u52a0\u9501\u548c\u91ca\u653e\u9501\uff0cJDK5\u4ee5\u540e\u63d0\u4f9b\u4e86\u4e00\u4e2a\u65b0\u7684\u9501\u5bf9\u8c61Lock\uff0c\u66f4\u52a0\u7075\u6d3b\u3001\u65b9\u4fbf\u3002<br>Lock\u5b9e\u73b0\u63d0\u4f9b\u6bd4\u4f7f\u7528synchronized\u65b9\u6cd5\u548c\u8bed\u53e5\u53ef\u4ee5\u83b7\u5f97\u66f4\u5e7f\u6cdb\u7684\u9501\u5b9a\u64cd\u4f5c\u3002<br>Lock\u662f\u63a5\u53e3\u4e0d\u80fd\u76f4\u63a5\u5b9e\u4f8b\u5316\uff0c\u8fd9\u91cc\u91c7\u7528\u5b83\u7684\u5b9e\u73b0\u7c7bReentrantLock\u6765\u6784\u5efaLock\u9501\u5bf9\u8c61\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;ReentrantLock\u200b()<\/td><td>\u83b7\u5f97Lock\u9501\u7684\u5b9e\u73b0\u7c7b\u5bf9\u8c61<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Lock\u7684API<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>void&nbsp;lock()<\/td><td>\u83b7\u5f97\u9501<\/td><\/tr><tr><td>void&nbsp;unlock()<\/td><td>\u91ca\u653e\u9501<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.concurrent.locks.Lock;\nimport java.util.concurrent.locks.ReentrantLock;\n\n\/**\n    \u8d26\u6237\u7c7b\uff1a\u4f59\u989d , \u5361\u53f7\u3002\n *\/\npublic class Account {\n    private String cardId;\n    private double money; \/\/ \u4f59\u989d \u5173\u952e\u4fe1\u606f\n    \/\/ final\u4fee\u9970\u540e\uff1a\u9501\u5bf9\u8c61\u662f\u552f\u4e00\u548c\u4e0d\u53ef\u66ff\u6362\u7684\uff0c\u975e\u5e38\u4e13\u4e1a\n    private final Lock lock = new ReentrantLock();\n\n    public Account() {\n    }\n\n    public Account(String cardId, double money) {\n        this.cardId = cardId;\n        this.money = money;\n    }\n\n    public String getCardId() {\n        return cardId;\n    }\n\n    public void setCardId(String cardId) {\n        this.cardId = cardId;\n    }\n\n    public double getMoney() {\n        return money;\n    }\n\n    public void setMoney(double money) {\n        this.money = money;\n    }\n\n    \/**\n      \u5c0f\u660e \u5c0f\u7ea2\n     *\/\n    public void drawMoney(double money) {\n        \/\/ 1\u3001\u62ff\u5230\u662f\u8c01\u6765\u53d6\u94b1\n        String name = Thread.currentThread().getName();\n        \/\/ 2\u3001\u5224\u65ad\u4f59\u989d\u662f\u5426\u8db3\u591f\n        \/\/ \u5c0f\u660e  \u5c0f\u7ea2\n        lock.lock(); \/\/ \u4e0a\u9501\n        try {\n            if(this.money &gt;= money){\n                \/\/ \u94b1\u591f\u4e86\n                System.out.println(name+\"\u6765\u53d6\u94b1\uff0c\u5410\u51fa\uff1a\" + money);\n                \/\/ \u66f4\u65b0\u4f59\u989d\n                this.money -= money;\n                System.out.println(name+\"\u53d6\u94b1\u540e\uff0c\u4f59\u989d\u5269\u4f59\uff1a\" + this.money);\n            }else{\n                \/\/ 3\u3001\u4f59\u989d\u4e0d\u8db3\n                System.out.println(name+\"\u6765\u53d6\u94b1\uff0c\u4f59\u989d\u4e0d\u8db3\uff01\");\n            }\n        } finally {\n            lock.unlock(); \/\/ \u89e3\u9501\n        }\n\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ebf\u7a0b\u901a\u4fe1<\/h3>\n\n\n\n<p>\u4ec0\u4e48\u662f\u7ebf\u7a0b\u901a\u4fe1\u3001\u5982\u4f55\u5b9e\u73b0\uff1f<br>\u6240\u8c13\u7ebf\u7a0b\u901a\u4fe1\u5c31\u662f\u7ebf\u7a0b\u95f4\u76f8\u4e92\u53d1\u9001\u6570\u636e\uff0c\u7ebf\u7a0b\u95f4\u5171\u4eab\u4e00\u4e2a\u8d44\u6e90\u5373\u53ef\u5b9e\u73b0\u7ebf\u7a0b\u901a\u4fe1\u3002<br>\u7ebf\u7a0b\u901a\u4fe1\u5e38\u89c1\u5f62\u5f0f<br>\u901a\u8fc7\u5171\u4eab\u4e00\u4e2a\u6570\u636e\u7684\u65b9\u5f0f\u5b9e\u73b0\u3002<br>\u6839\u636e\u5171\u4eab\u6570\u636e\u7684\u60c5\u51b5\u51b3\u5b9a\u81ea\u5df1\u8be5\u600e\u4e48\u505a\uff0c\u4ee5\u53ca\u901a\u77e5\u5176\u4ed6\u7ebf\u7a0b\u600e\u4e48\u505a\u3002<br>\u7ebf\u7a0b\u901a\u4fe1\u5b9e\u9645\u5e94\u7528\u573a\u666f<br>\u751f\u4ea7\u8005\u4e0e\u6d88\u8d39\u8005\u6a21\u578b\uff1a\u751f\u4ea7\u8005\u7ebf\u7a0b\u8d1f\u8d23\u751f\u4ea7\u6570\u636e\uff0c\u6d88\u8d39\u8005\u7ebf\u7a0b\u8d1f\u8d23\u6d88\u8d39\u751f\u4ea7\u8005\u4ea7\u751f\u7684\u6570\u636e\u3002<br>\u8981\u6c42\uff1a\u751f\u4ea7\u8005\u7ebf\u7a0b\u751f\u4ea7\u5b8c\u6570\u636e\u540e\u5524\u9192\u6d88\u8d39\u8005\uff0c\u7136\u540e\u7b49\u5f85\u81ea\u5df1\uff0c\u6d88\u8d39\u8005\u6d88\u8d39\u5b8c\u8be5\u6570\u636e\u540e\u5524\u9192\u751f\u4ea7\u8005\uff0c\u7136\u540e\u7b49\u5f85\u81ea\u5df1<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>void&nbsp;wait\u200b()<\/td><td>\u8ba9\u5f53\u524d\u7ebf\u7a0b\u7b49\u5f85\u5e76\u91ca\u653e\u6240\u5360\u9501\uff0c\u76f4\u5230\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u8c03\u7528notify()\u65b9\u6cd5\u6216&nbsp;notifyAll()\u65b9\u6cd5<\/td><\/tr><tr><td>void&nbsp;notify\u200b()<\/td><td>\u5524\u9192\u6b63\u5728\u7b49\u5f85\u7684\u5355\u4e2a\u7ebf\u7a0b<\/td><\/tr><tr><td>void&nbsp;notifyAll\u200b()<\/td><td>\u5524\u9192\u6b63\u5728\u7b49\u5f85\u7684\u6240\u6709\u7ebf\u7a0b&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ebf\u7a0b\u6c60<\/h3>\n\n\n\n<p>\u7ebf\u7a0b\u6c60\u5c31\u662f\u4e00\u4e2a\u53ef\u4ee5\u590d\u7528\u7ebf\u7a0b\u7684\u6280\u672f\u3002<br>\u4e0d\u4f7f\u7528\u7ebf\u7a0b\u6c60\u7684\u95ee\u9898\uff1a\u5982\u679c\u7528\u6237\u6bcf\u53d1\u8d77\u4e00\u4e2a\u8bf7\u6c42\uff0c\u540e\u53f0\u5c31\u521b\u5efa\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u6765\u5904\u7406\uff0c\u4e0b\u6b21\u65b0\u4efb\u52a1\u6765\u4e86\u53c8\u8981\u521b\u5efa\u65b0\u7ebf\u7a0b\uff0c\u800c\u521b\u5efa\u65b0\u7ebf\u7a0b\u7684\u5f00\u9500\u662f\u5f88\u5927\u7684\uff0c\u8fd9\u6837\u4f1a\u4e25\u91cd\u5f71\u54cd\u7cfb\u7edf\u7684\u6027\u80fd<br>\u5982\u4f55\u5f97\u5230\u7ebf\u7a0b\u6c60\u5bf9\u8c61<br>\u65b9\u5f0f\u4e00\uff1a\u4f7f\u7528ExecutorService\u7684\u5b9e\u73b0\u7c7bThreadPoolExecutor\u81ea\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u5bf9\u8c61<br>\u65b9\u5f0f\u4e8c\uff1a\u4f7f\u7528Executors\uff08\u7ebf\u7a0b\u6c60\u7684\u5de5\u5177\u7c7b\uff09\u8c03\u7528\u65b9\u6cd5\u8fd4\u56de\u4e0d\u540c\u7279\u70b9\u7684\u7ebf\u7a0b\u6c60\u5bf9\u8c61<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"543\" src=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-11-1024x543.png\" alt=\"\" class=\"wp-image-669\" srcset=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-11-1024x543.png 1024w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-11-300x159.png 300w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-11-768x407.png 768w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-11.png 1376w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>ThreadPoolExecutor\u521b\u5efa\u7ebf\u7a0b\u6c60\u5bf9\u8c61\u793a\u4f8b<br>ExecutorService pools = new ThreadPoolExecutor(3, 5, 8 , TimeUnit.SECONDS, new ArrayBlockingQueue&lt;&gt;(6),Executors.defaultThreadFactory() , new ThreadPoolExecutor.AbortPolicy());<\/p>\n\n\n\n<p>ExecutorService\u7684\u5e38\u7528\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>void&nbsp;execute(Runnable&nbsp;command)&nbsp;<\/td><td>\u6267\u884c\u4efb\u52a1\/\u547d\u4ee4\uff0c\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u4e00\u822c\u7528\u6765\u6267\u884c&nbsp;Runnable&nbsp;\u4efb\u52a1<\/td><\/tr><tr><td>Future&lt;T&gt;&nbsp;submit(Callable&lt;T&gt;&nbsp;task)<\/td><td>\u6267\u884c\u4efb\u52a1\uff0c\u8fd4\u56de\u672a\u6765\u4efb\u52a1\u5bf9\u8c61\u83b7\u53d6\u7ebf\u7a0b\u7ed3\u679c\uff0c\u4e00\u822c\u62ff\u6765\u6267\u884c&nbsp;Callable&nbsp;\u4efb\u52a1<\/td><\/tr><tr><td>void&nbsp;shutdown()&nbsp;<\/td><td>\u7b49\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u540e\u5173\u95ed\u7ebf\u7a0b\u6c60<\/td><\/tr><tr><td>List&lt;Runnable&gt;&nbsp;shutdownNow()<\/td><td>\u7acb\u523b\u5173\u95ed\uff0c\u505c\u6b62\u6b63\u5728\u6267\u884c\u7684\u4efb\u52a1\uff0c\u5e76\u8fd4\u56de\u961f\u5217\u4e2d\u672a\u6267\u884c\u7684\u4efb\u52a1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u65b0\u4efb\u52a1\u62d2\u7edd\u7b56\u7565<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u7b56\u7565<\/td><td>\u8be6\u89e3<\/td><\/tr><tr><td>ThreadPoolExecutor.AbortPolicy<\/td><td>\u4e22\u5f03\u4efb\u52a1\u5e76\u629b\u51faRejectedExecutionException\u5f02\u5e38\u3002<strong>\u662f\u9ed8\u8ba4\u7684\u7b56\u7565<\/strong><\/td><\/tr><tr><td>ThreadPoolExecutor.DiscardPolicy\uff1a&nbsp;<\/td><td>\u4e22\u5f03\u4efb\u52a1\uff0c\u4f46\u662f\u4e0d\u629b\u51fa\u5f02\u5e38&nbsp;\u8fd9\u662f\u4e0d\u63a8\u8350\u7684\u505a\u6cd5<\/td><\/tr><tr><td>ThreadPoolExecutor.DiscardOldestPolicy<\/td><td>\u629b\u5f03\u961f\u5217\u4e2d\u7b49\u5f85\u6700\u4e45\u7684\u4efb\u52a1&nbsp;\u7136\u540e\u628a\u5f53\u524d\u4efb\u52a1\u52a0\u5165\u961f\u5217\u4e2d<\/td><\/tr><tr><td>ThreadPoolExecutor.CallerRunsPolicy<\/td><td>\u7531\u4e3b\u7ebf\u7a0b\u8d1f\u8d23\u8c03\u7528\u4efb\u52a1\u7684run()\u65b9\u6cd5\u4ece\u800c\u7ed5\u8fc7\u7ebf\u7a0b\u6c60\u76f4\u63a5\u6267\u884c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Runable\u4efb\u52a1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ThreadPoolDemo1.java\nimport java.util.concurrent.*;\n\n\/**\n    \u76ee\u6807\uff1a\u81ea\u5b9a\u4e49\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u5bf9\u8c61\uff0c\u5e76\u6d4b\u8bd5\u5176\u7279\u6027\u3002\n *\/\npublic class ThreadPoolDemo1 {\n    public static void main(String&#91;] args) {\n        \/\/ 1\u3001\u521b\u5efa\u7ebf\u7a0b\u6c60\u5bf9\u8c61\n        \/**\n         public ThreadPoolExecutor(int corePoolSize,\n                                 int maximumPoolSize,\n                                 long keepAliveTime,\n                                 TimeUnit unit,\n                                 BlockingQueue&lt;Runnable&gt; workQueue,\n                                 ThreadFactory threadFactory,\n                                 RejectedExecutionHandler handler)\n         *\/\n        ExecutorService pool = new ThreadPoolExecutor(3, 5 ,\n                6, TimeUnit.SECONDS, new ArrayBlockingQueue&lt;&gt;(5) , Executors.defaultThreadFactory(),\n               new ThreadPoolExecutor.AbortPolicy() );\n\n        \/\/ 2\u3001\u7ed9\u4efb\u52a1\u7ebf\u7a0b\u6c60\u5904\u7406\u3002\n        Runnable target = new MyRunnable();\n        pool.execute(target);\n        pool.execute(target);\n        pool.execute(target);\n\n        pool.execute(target);\n        pool.execute(target);\n        pool.execute(target);\n        pool.execute(target);\n        pool.execute(target);\n\n        \/\/ \u521b\u5efa\u4e34\u65f6\u7ebf\u7a0b\n        pool.execute(target);\n        pool.execute(target);\n\/\/        \/\/ \u4e0d\u521b\u5efa\uff0c\u62d2\u7edd\u7b56\u7565\u88ab\u89e6\u53d1\uff01\uff01\uff01\n\/\/        pool.execute(target);\n\n        \/\/ \u5173\u95ed\u7ebf\u7a0b\u6c60\uff08\u5f00\u53d1\u4e2d\u4e00\u822c\u4e0d\u4f1a\u4f7f\u7528\uff09\u3002\n        \/\/ pool.shutdownNow(); \/\/ \u7acb\u5373\u5173\u95ed\uff0c\u5373\u4f7f\u4efb\u52a1\u6ca1\u6709\u5b8c\u6210\uff0c\u4f1a\u4e22\u5931\u4efb\u52a1\u7684\uff01\n        pool.shutdown(); \/\/ \u4f1a\u7b49\u5f85\u5168\u90e8\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u4e4b\u540e\u518d\u5173\u95ed\uff08\u5efa\u8bae\u4f7f\u7528\u7684\uff09\n    }\n}\n\/\/MyRunnable.java\npublic class MyRunnable implements Runnable{\n    @Override\n    public void run() {\n        for (int i = 0; i &lt; 5; i++) {\n            System.out.println(Thread.currentThread().getName() + \"\u8f93\u51fa\u4e86\uff1aHelloWorld ==&gt; \"  + i);\n        }\n        try {\n            System.out.println(Thread.currentThread().getName() + \"\u672c\u4efb\u52a1\u4e0e\u7ebf\u7a0b\u7ed1\u5b9a\u4e86\uff0c\u7ebf\u7a0b\u8fdb\u5165\u4f11\u7720\u4e86~~~\");\n            Thread.sleep(10000000);\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p>ExecutorService\u7684\u5e38\u7528\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>void&nbsp;execute(Runnable&nbsp;command)&nbsp;<\/td><td>\u6267\u884c\u4efb\u52a1\/\u547d\u4ee4\uff0c\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u4e00\u822c\u7528\u6765\u6267\u884c&nbsp;Runnable&nbsp;\u4efb\u52a1<\/td><\/tr><tr><td>Future&lt;T&gt;&nbsp;submit(Callable&lt;T&gt;&nbsp;task)<\/td><td>\u6267\u884cCallable\u4efb\u52a1\uff0c\u8fd4\u56de\u672a\u6765\u4efb\u52a1\u5bf9\u8c61\u83b7\u53d6\u7ebf\u7a0b\u7ed3\u679c<\/td><\/tr><tr><td>void&nbsp;shutdown()&nbsp;<\/td><td>\u7b49\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u540e\u5173\u95ed\u7ebf\u7a0b\u6c60<\/td><\/tr><tr><td>List&lt;Runnable&gt;&nbsp;shutdownNow()<\/td><td>\u7acb\u523b\u5173\u95ed\uff0c\u505c\u6b62\u6b63\u5728\u6267\u884c\u7684\u4efb\u52a1\uff0c\u5e76\u8fd4\u56de\u961f\u5217\u4e2d\u672a\u6267\u884c\u7684\u4efb\u52a1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Callable\u4efb\u52a1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ThreadPoolDemo2.java\nimport java.util.concurrent.*;\n\n\/**\n    \u76ee\u6807\uff1a\u81ea\u5b9a\u4e49\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u5bf9\u8c61\uff0c\u5e76\u6d4b\u8bd5\u5176\u7279\u6027\u3002\n *\/\npublic class ThreadPoolDemo2 {\n    public static void main(String&#91;] args) throws Exception {\n        \/\/ 1\u3001\u521b\u5efa\u7ebf\u7a0b\u6c60\u5bf9\u8c61\n        \/**\n         public ThreadPoolExecutor(int corePoolSize,\n                                 int maximumPoolSize,\n                                 long keepAliveTime,\n                                 TimeUnit unit,\n                                 BlockingQueue&lt;Runnable&gt; workQueue,\n                                 ThreadFactory threadFactory,\n                                 RejectedExecutionHandler handler)\n         *\/\n        ExecutorService pool = new ThreadPoolExecutor(3, 5 ,\n                6, TimeUnit.SECONDS, new ArrayBlockingQueue&lt;&gt;(5) , Executors.defaultThreadFactory(),\n               new ThreadPoolExecutor.AbortPolicy() );\n\n        \/\/ 2\u3001\u7ed9\u4efb\u52a1\u7ebf\u7a0b\u6c60\u5904\u7406\u3002\n        Future&lt;String&gt; f1 = pool.submit(new MyCallable(100));\n        Future&lt;String&gt; f2 = pool.submit(new MyCallable(200));\n        Future&lt;String&gt; f3 = pool.submit(new MyCallable(300));\n        Future&lt;String&gt; f4 = pool.submit(new MyCallable(400));\n        Future&lt;String&gt; f5 = pool.submit(new MyCallable(500));\n\n\/\/        String rs = f1.get();\n\/\/        System.out.println(rs);\n\n        System.out.println(f1.get());\n        System.out.println(f2.get());\n        System.out.println(f3.get());\n        System.out.println(f4.get());\n        System.out.println(f5.get());\n    }\n}\n\/\/MyCallable.java\nimport java.util.concurrent.Callable;\n\n\/**\n    1\u3001\u5b9a\u4e49\u4e00\u4e2a\u4efb\u52a1\u7c7b \u5b9e\u73b0Callable\u63a5\u53e3  \u5e94\u8be5\u7533\u660e\u7ebf\u7a0b\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u540e\u7684\u7ed3\u679c\u7684\u6570\u636e\u7c7b\u578b\n *\/\npublic class MyCallable implements Callable&lt;String&gt;{\n    private int n;\n    public MyCallable(int n) {\n        this.n = n;\n    }\n\n    \/**\n       2\u3001\u91cd\u5199call\u65b9\u6cd5\uff08\u4efb\u52a1\u65b9\u6cd5\uff09\n     *\/\n    @Override\n    public String call() throws Exception {\n        int sum = 0;\n        for (int i = 1; i &lt;= n ; i++) {\n            sum += i;\n        }\n        return Thread.currentThread().getName()\n                + \"\u6267\u884c 1-\" + n+ \"\u7684\u548c\uff0c\u7ed3\u679c\u662f\uff1a\" + sum;\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>Executors\u5f97\u5230\u7ebf\u7a0b\u6c60\u5bf9\u8c61\u7684\u5e38\u7528\u65b9\u6cd5<br>Executors\uff1a\u7ebf\u7a0b\u6c60\u7684\u5de5\u5177\u7c7b\u901a\u8fc7\u8c03\u7528\u65b9\u6cd5\u8fd4\u56de\u4e0d\u540c\u7c7b\u578b\u7684\u7ebf\u7a0b\u6c60\u5bf9\u8c61\u3002<br>\u6ce8\u610f\uff1aExecutors\u7684\u5e95\u5c42\u5176\u5b9e\u4e5f\u662f\u57fa\u4e8e\u7ebf\u7a0b\u6c60\u7684\u5b9e\u73b0\u7c7bThreadPoolExecutor\u521b\u5efa\u7ebf\u7a0b\u6c60\u5bf9\u8c61\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5\u540d\u79f0<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;static&nbsp;ExecutorService&nbsp;newCachedThreadPool()<\/td><td>\u7ebf\u7a0b\u6570\u91cf\u968f\u7740\u4efb\u52a1\u589e\u52a0\u800c\u589e\u52a0\uff0c\u5982\u679c\u7ebf\u7a0b\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u4e14\u7a7a\u95f2\u4e86\u4e00\u6bb5\u65f6\u95f4\u5219\u4f1a\u88ab\u56de\u6536\u6389\u3002<\/td><\/tr><tr><td>public&nbsp;static&nbsp;ExecutorService&nbsp;newFixedThreadPool\u200b(int&nbsp;nThreads)<\/td><td>\u521b\u5efa\u56fa\u5b9a\u7ebf\u7a0b\u6570\u91cf\u7684\u7ebf\u7a0b\u6c60\uff0c\u5982\u679c\u67d0\u4e2a\u7ebf\u7a0b\u56e0\u4e3a\u6267\u884c\u5f02\u5e38\u800c\u7ed3\u675f\uff0c\u90a3\u4e48\u7ebf\u7a0b\u6c60\u4f1a\u8865\u5145\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u66ff\u4ee3\u5b83\u3002<\/td><\/tr><tr><td>public&nbsp;static&nbsp;ExecutorService&nbsp;newSingleThreadExecutor&nbsp;()<\/td><td>\u521b\u5efa\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u6c60\u5bf9\u8c61\uff0c\u5982\u679c\u8be5\u7ebf\u7a0b\u51fa\u73b0\u5f02\u5e38\u800c\u7ed3\u675f\uff0c\u90a3\u4e48\u7ebf\u7a0b\u6c60\u4f1a\u8865\u5145\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u3002<\/td><\/tr><tr><td>public&nbsp;static&nbsp;ScheduledExecutorService&nbsp;newScheduledThreadPool\u200b(int&nbsp;corePoolSize)<\/td><td>\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u6c60\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5728\u7ed9\u5b9a\u7684\u5ef6\u8fdf\u540e\u8fd0\u884c\u4efb\u52a1\uff0c\u6216\u8005\u5b9a\u671f\u6267\u884c\u4efb\u52a1\u3002&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Executors\u4f7f\u7528\u53ef\u80fd\u5b58\u5728\u7684\u9677\u9631<br>\u5927\u578b\u5e76\u53d1\u7cfb\u7edf\u73af\u5883\u4e2d\u4f7f\u7528Executors\u5982\u679c\u4e0d\u6ce8\u610f\u53ef\u80fd\u4f1a\u51fa\u73b0\u7cfb\u7edf\u98ce\u9669\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"238\" src=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-12-1024x238.png\" alt=\"\" class=\"wp-image-671\" srcset=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-12-1024x238.png 1024w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-12-300x70.png 300w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-12-768x179.png 768w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-12-1536x358.png 1536w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/01\/image-12.png 1598w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.concurrent.*;\n\n\/**\n    \u76ee\u6807\uff1a\u4f7f\u7528Executors\u7684\u5de5\u5177\u65b9\u6cd5\u76f4\u63a5\u5f97\u5230\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u5bf9\u8c61\u3002\n *\/\npublic class ThreadPoolDemo3 {\n    public static void main(String&#91;] args) throws Exception {\n        \/\/ 1\u3001\u521b\u5efa\u56fa\u5b9a\u7ebf\u7a0b\u6570\u636e\u7684\u7ebf\u7a0b\u6c60\n        ExecutorService pool = Executors.newFixedThreadPool(3);\n\n        pool.execute(new MyRunnable());\n        pool.execute(new MyRunnable());\n        pool.execute(new MyRunnable());\n        pool.execute(new MyRunnable()); \/\/ \u5df2\u7ecf\u6ca1\u6709\u591a\u4f59\u7ebf\u7a0b\u4e86\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u5b9a\u65f6\u5668<\/p>\n\n\n\n<p>\u5b9a\u65f6\u5668\u662f\u4e00\u79cd\u63a7\u5236\u4efb\u52a1\u5ef6\u65f6\u8c03\u7528\uff0c\u6216\u8005\u5468\u671f\u8c03\u7528\u7684\u6280\u672f\u3002<br>\u4f5c\u7528\uff1a\u95f9\u949f\u3001\u5b9a\u65f6\u90ae\u4ef6\u53d1\u9001\u3002<br>\u5b9a\u65f6\u5668\u7684\u5b9e\u73b0\u65b9\u5f0f<br>\u65b9\u5f0f\u4e00\uff1aTimer<br>\u65b9\u5f0f\u4e8c\uff1a ScheduledExecutorService<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u6784\u9020\u5668<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;Timer()<\/td><td>\u521b\u5efaTimer\u5b9a\u65f6\u5668\u5bf9\u8c61<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;void&nbsp;schedule\u200b(TimerTask&nbsp;task,&nbsp;long&nbsp;delay,&nbsp;long&nbsp;period)<\/td><td>\u5f00\u542f\u4e00\u4e2a\u5b9a\u65f6\u5668\uff0c\u6309\u7167\u8ba1\u5212\u5904\u7406TimerTask\u4efb\u52a1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Timer\u5b9a\u65f6\u5668\u7684\u7279\u70b9\u548c\u5b58\u5728\u7684\u95ee\u9898<br>1\u3001Timer\u662f\u5355\u7ebf\u7a0b\uff0c\u5904\u7406\u591a\u4e2a\u4efb\u52a1\u6309\u7167\u987a\u5e8f\u6267\u884c\uff0c\u5b58\u5728\u5ef6\u65f6\u4e0e\u8bbe\u7f6e\u5b9a\u65f6\u5668\u7684\u65f6\u95f4\u6709\u51fa\u5165\u3002<br>2\u3001\u53ef\u80fd\u56e0\u4e3a\u5176\u4e2d\u7684\u67d0\u4e2a\u4efb\u52a1\u7684\u5f02\u5e38\u4f7fTimer\u7ebf\u7a0b\u6b7b\u6389\uff0c\u4ece\u800c\u5f71\u54cd\u540e\u7eed\u4efb\u52a1\u6267\u884c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.Date;\nimport java.util.Timer;\nimport java.util.TimerTask;\n\n\/**\n    \u76ee\u6807\uff1aTimer\u5b9a\u65f6\u5668\u7684\u4f7f\u7528\u548c\u4e86\u89e3\u3002\n *\/\npublic class TimerDemo1 {\n    public static void main(String&#91;] args) {\n        \/\/ 1\u3001\u521b\u5efaTimer\u5b9a\u65f6\u5668\n        Timer timer = new Timer();  \/\/ \u5b9a\u65f6\u5668\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u5355\u7ebf\u7a0b\u3002\n        \/\/ 2\u3001\u8c03\u7528\u65b9\u6cd5\uff0c\u5904\u7406\u5b9a\u65f6\u4efb\u52a1\n        timer.schedule(new TimerTask() {\n            @Override\n            public void run() {\n                System.out.println(Thread.currentThread().getName() + \"\u6267\u884cAAA~~~\" + new Date());\n\/\/                try {\n\/\/                    Thread.sleep(5000);\n\/\/                } catch (InterruptedException e) {\n\/\/                    e.printStackTrace();\n\/\/                }\n            }\n        }, 0, 2000);\n\n        timer.schedule(new TimerTask() {\n            @Override\n            public void run() {\n                System.out.println(Thread.currentThread().getName() + \"\u6267\u884cBB~~~\"+ new Date());\n                System.out.println(10\/0);\n            }\n        }, 0, 2000);\n\n        timer.schedule(new TimerTask() {\n            @Override\n            public void run() {\n                System.out.println(Thread.currentThread().getName() + \"\u6267\u884cCCC~~~\"+ new Date());\n            }\n        }, 0, 3000);\n    }\n}<\/code><\/pre>\n\n\n\n<p>ScheduledExecutorService\u5b9a\u65f6\u5668<br>ScheduledExecutorService\u662f jdk1.5\u4e2d\u5f15\u5165\u4e86\u5e76\u53d1\u5305\uff0c\u76ee\u7684\u662f\u4e3a\u4e86\u5f25\u8865Timer\u7684\u7f3a\u9677, ScheduledExecutorService\u5185\u90e8\u4e3a\u7ebf\u7a0b\u6c60\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Executors\u7684\u65b9\u6cd5<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;static&nbsp;ScheduledExecutorService&nbsp;newScheduledThreadPool(int&nbsp;corePoolSize)<\/td><td>\u5f97\u5230\u7ebf\u7a0b\u6c60\u5bf9\u8c61<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>ScheduledExecutorService\u7684\u65b9\u6cd5<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>public&nbsp;ScheduledFuture&lt;\uff1f&gt;&nbsp;scheduleAtFixedRate(Runnable&nbsp;command,&nbsp;<br>long&nbsp;initialDelay,&nbsp;long&nbsp;period,&nbsp;TimeUnit&nbsp;unit)<\/td><td>\u5468\u671f\u8c03\u5ea6\u65b9\u6cd5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>ScheduledExecutorService\u7684\u4f18\u70b9<br>\u57fa\u4e8e\u7ebf\u7a0b\u6c60\uff0c\u67d0\u4e2a\u4efb\u52a1\u7684\u6267\u884c\u60c5\u51b5\u4e0d\u4f1a\u5f71\u54cd\u5176\u4ed6\u5b9a\u65f6\u4efb\u52a1\u7684\u6267\u884c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.Date;\nimport java.util.Timer;\nimport java.util.TimerTask;\nimport java.util.concurrent.Executors;\nimport java.util.concurrent.ScheduledExecutorService;\nimport java.util.concurrent.TimeUnit;\n\n\/**\n    \u76ee\u6807\uff1aTimer\u5b9a\u65f6\u5668\u7684\u4f7f\u7528\u548c\u4e86\u89e3\u3002\n *\/\npublic class TimerDemo2 {\n    public static void main(String&#91;] args) {\n        \/\/ 1\u3001\u521b\u5efaScheduledExecutorService\u7ebf\u7a0b\u6c60\uff0c\u505a\u5b9a\u65f6\u5668\n        ScheduledExecutorService pool = Executors.newScheduledThreadPool(3);\n\n        \/\/ 2\u3001\u5f00\u542f\u5b9a\u65f6\u4efb\u52a1\n        pool.scheduleAtFixedRate(new TimerTask() {\n            @Override\n            public void run() {\n                System.out.println(Thread.currentThread().getName() + \"\u6267\u884c\u8f93\u51fa\uff1aAAA  ==\u300b \" + new Date());\n                try {\n                    Thread.sleep(100000);\n                } catch (InterruptedException e) {\n                    e.printStackTrace();\n                }\n            }\n        }, 0, 2, TimeUnit.SECONDS);\n\n\n        pool.scheduleAtFixedRate(new TimerTask() {\n            @Override\n            public void run() {\n                System.out.println(Thread.currentThread().getName() + \"\u6267\u884c\u8f93\u51fa\uff1aBBB  ==\u300b \" + new Date());\n                System.out.println(10 \/ 0);\n            }\n        }, 0, 2, TimeUnit.SECONDS);\n\n\n        pool.scheduleAtFixedRate(new TimerTask() {\n            @Override\n            public void run() {\n                System.out.println(Thread.currentThread().getName() + \"\u6267\u884c\u8f93\u51fa\uff1aCCC  ==\u300b \" + new Date());\n            }\n        }, 0, 2, TimeUnit.SECONDS);\n\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"has-luminous-vivid-orange-color has-text-color\">\u591a\u7ebf\u7a0b\u90e8\u5206\u5f85\u7eed\u3002\u3002\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5355\u5143\u6d4b\u8bd5\uff08junit\uff09<\/h2>\n\n\n\n<p>\u5355\u5143\u6d4b\u8bd5\u5c31\u662f\u9488\u5bf9\u6700\u5c0f\u7684\u529f\u80fd\u5355\u5143\u7f16\u5199\u6d4b\u8bd5\u4ee3\u7801\uff0cJava\u7a0b\u5e8f\u6700\u5c0f\u7684\u529f\u80fd\u5355\u5143\u662f\u65b9\u6cd5\uff0c\u56e0\u6b64\uff0c\u5355\u5143\u6d4b\u8bd5\u5c31\u662f\u9488\u5bf9Java\u65b9\u6cd5\u7684\u6d4b\u8bd5\uff0c\u8fdb\u800c\u68c0\u67e5\u65b9\u6cd5\u7684\u6b63\u786e\u6027\u3002<br>\u76ee\u524d\u6d4b\u8bd5\u65b9\u6cd5\u662f\u600e\u4e48\u8fdb\u884c\u7684\uff0c\u5b58\u5728\u4ec0\u4e48\u95ee\u9898<br>\u53ea\u6709\u4e00\u4e2amain\u65b9\u6cd5\uff0c\u5982\u679c\u4e00\u4e2a\u65b9\u6cd5\u7684\u6d4b\u8bd5\u5931\u8d25\u4e86\uff0c\u5176\u4ed6\u65b9\u6cd5\u6d4b\u8bd5\u4f1a\u53d7\u5230\u5f71\u54cd\u3002<br>\u65e0\u6cd5\u5f97\u5230\u6d4b\u8bd5\u7684\u7ed3\u679c\u62a5\u544a\uff0c\u9700\u8981\u7a0b\u5e8f\u5458\u81ea\u5df1\u53bb\u89c2\u5bdf\u6d4b\u8bd5\u662f\u5426\u6210\u529f\u3002<br>\u65e0\u6cd5\u5b9e\u73b0\u81ea\u52a8\u5316\u6d4b\u8bd5\u3002<\/p>\n\n\n\n<p>Junit\u5355\u5143\u6d4b\u8bd5\u6846\u67b6<br>JUnit\u662f\u4f7f\u7528Java\u8bed\u8a00\u5b9e\u73b0\u7684\u5355\u5143\u6d4b\u8bd5\u6846\u67b6\uff0c\u5b83\u662f\u5f00\u6e90\u7684\uff0cJava\u5f00\u53d1\u8005\u90fd\u5e94\u5f53\u5b66\u4e60\u5e76\u4f7f\u7528JUnit\u7f16\u5199\u5355\u5143\u6d4b\u8bd5\u3002<br>\u6b64\u5916\uff0c\u51e0\u4e4e\u6240\u6709\u7684IDE\u5de5\u5177\u90fd\u96c6\u6210\u4e86JUnit\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u53ef\u4ee5\u76f4\u63a5\u5728IDE\u4e2d\u7f16\u5199\u5e76\u8fd0\u884cJUnit\u6d4b\u8bd5\uff0cJUnit\u76ee\u524d\u6700\u65b0\u7248\u672c\u662f5\u3002<\/p>\n\n\n\n<p>JUnit\u4f18\u70b9<br>JUnit\u53ef\u4ee5\u7075\u6d3b\u7684\u9009\u62e9\u6267\u884c\u54ea\u4e9b\u6d4b\u8bd5\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4e00\u952e\u6267\u884c\u5168\u90e8\u6d4b\u8bd5\u65b9\u6cd5\u3002<br>Junit\u53ef\u4ee5\u751f\u6210\u5168\u90e8\u65b9\u6cd5\u7684\u6d4b\u8bd5\u62a5\u544a\u3002<br>\u5355\u5143\u6d4b\u8bd5\u4e2d\u7684\u67d0\u4e2a\u65b9\u6cd5\u6d4b\u8bd5\u5931\u8d25\u4e86\uff0c\u4e0d\u4f1a\u5f71\u54cd\u5176\u4ed6\u6d4b\u8bd5\u65b9\u6cd5\u7684\u6d4b\u8bd5\u3002<\/p>\n\n\n\n<p>\u5b9e\u4f8b\uff1a<br>\u9700\u6c42\uff1a\u4f7f\u7528\u5355\u5143\u6d4b\u8bd5\u8fdb\u884c\u4e1a\u52a1\u65b9\u6cd5\u9884\u671f\u7ed3\u679c\u3001\u6b63\u786e\u6027\u6d4b\u8bd5\u7684\u5feb\u901f\u5165\u95e8<br>\u5206\u6790\uff1a<br>1\u5c06JUnit\u7684jar\u5305\u5bfc\u5165\u5230\u9879\u76ee\u4e2d<br>IDEA\u901a\u5e38\u6574\u5408\u597d\u4e86Junit\u6846\u67b6\uff0c\u4e00\u822c\u4e0d\u9700\u8981\u5bfc\u5165\u3002<br>\u5982\u679cIDEA\u6ca1\u6709\u6574\u5408\u597d\uff0c\u9700\u8981\u81ea\u5df1\u624b\u5de5\u5bfc\u5165\u5982\u4e0b2\u4e2aJUnit\u7684jar\u5305\u5230\u6a21\u5757<br>2\u7f16\u5199\u6d4b\u8bd5\u65b9\u6cd5\uff1a\u8be5\u6d4b\u8bd5\u65b9\u6cd5\u5fc5\u987b\u662f\u516c\u5171\u7684\u65e0\u53c2\u6570\u65e0\u8fd4\u56de\u503c\u7684\u975e\u9759\u6001\u65b9\u6cd5\u3002<br>3\u5728\u6d4b\u8bd5\u65b9\u6cd5\u4e0a\u4f7f\u7528@Test\u6ce8\u89e3\uff1a\u6807\u6ce8\u8be5\u65b9\u6cd5\u662f\u4e00\u4e2a\u6d4b\u8bd5\u65b9\u6cd5<br>4\u5728\u6d4b\u8bd5\u65b9\u6cd5\u4e2d\u5b8c\u6210\u88ab\u6d4b\u8bd5\u65b9\u6cd5\u7684\u9884\u671f\u6b63\u786e\u6027\u6d4b\u8bd5\u3002<br>5\u9009\u4e2d\u6d4b\u8bd5\u65b9\u6cd5\uff0c\u9009\u62e9\u201cJUnit\u8fd0\u884c\u201d \uff0c\u5982\u679c\u6d4b\u8bd5\u826f\u597d\u5219\u662f\u7eff\u8272\uff1b\u5982\u679c\u6d4b\u8bd5\u5931\u8d25\uff0c\u5219\u662f\u7ea2\u8272<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/UserService.java\n\/**\n   \u4e1a\u52a1\u65b9\u6cd5\n *\/\npublic class UserService {\n    public String loginName(String loginName , String passWord){\n        if(\"admin\".equals(loginName) &amp;&amp; \"123456\".equals(passWord)){\n            return \"\u767b\u5f55\u6210\u529f\";\n        }else {\n            return \"\u7528\u6237\u540d\u6216\u8005\u5bc6\u7801\u6709\u95ee\u9898\";\n        }\n    }\n\n    public void selectNames(){\n        System.out.println(10\/0);\n        System.out.println(\"\u67e5\u8be2\u5168\u90e8\u7528\u6237\u540d\u79f0\u6210\u529f~~\");\n    }\n}\n\/\/TestUserService.java\nimport org.junit.*;\n\n\/**\n   \u6d4b\u8bd5\u7c7b\n *\/\npublic class TestUserService {\n\n    \/\/ \u4fee\u9970\u5b9e\u4f8b\u65b9\u6cd5\u7684\n    @Before\n    public void before(){\n        System.out.println(\"===before\u65b9\u6cd5\u6267\u884c\u4e00\u6b21===\");\n    }\n\n    @After\n    public void after(){\n        System.out.println(\"===after\u65b9\u6cd5\u6267\u884c\u4e00\u6b21===\");\n    }\n\n    \/\/ \u4fee\u9970\u9759\u6001\u65b9\u6cd5\n    @BeforeClass\n    public static void beforeClass(){\n        System.out.println(\"===beforeClass\u65b9\u6cd5\u6267\u884c\u4e00\u6b21===\");\n    }\n\n    @AfterClass\n    public static void afterClass(){\n        System.out.println(\"===afterClass\u65b9\u6cd5\u6267\u884c\u4e00\u6b21===\");\n    }\n\n\n    \/**\n       \u6d4b\u8bd5\u65b9\u6cd5\n       \u6ce8\u610f\u70b9\uff1a\n            1\u3001\u5fc5\u987b\u662f\u516c\u5f00\u7684\uff0c\u65e0\u53c2\u6570 \u65e0\u8fd4\u56de\u503c\u7684\u65b9\u6cd5\n            2\u3001\u6d4b\u8bd5\u65b9\u6cd5\u5fc5\u987b\u4f7f\u7528@Test\u6ce8\u89e3\u6807\u8bb0\u3002\n     *\/\n    @Test\n    public void testLoginName(){\n        UserService userService = new UserService();\n        String rs = userService.loginName(\"admin\",\"123456\");\n\n        \/\/ \u8fdb\u884c\u9884\u671f\u7ed3\u679c\u7684\u6b63\u786e\u6027\u6d4b\u8bd5\uff1a\u65ad\u8a00\u3002\n        Assert.assertEquals(\"\u60a8\u7684\u767b\u5f55\u4e1a\u52a1\u53ef\u80fd\u51fa\u73b0\u95ee\u9898\", \"\u767b\u5f55\u6210\u529f\", rs );\n    }\n\n    @Test\n    public void testSelectNames(){\n        UserService userService = new UserService();\n        userService.selectNames();\n    }\n}<\/code><\/pre>\n\n\n\n<p>Junit\u5e38\u7528\u6ce8\u89e3(Junit 4.xxxx\u7248\u672c)<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u6ce8\u89e3<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>@Test&nbsp;<\/td><td>\u6d4b\u8bd5\u65b9\u6cd5<\/td><\/tr><tr><td>@Before<\/td><td>\u7528\u6765\u4fee\u9970\u5b9e\u4f8b\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u5728\u6bcf\u4e00\u4e2a\u6d4b\u8bd5\u65b9\u6cd5\u6267\u884c\u4e4b\u524d\u6267\u884c\u4e00\u6b21\u3002<\/td><\/tr><tr><td>@After<\/td><td>\u7528\u6765\u4fee\u9970\u5b9e\u4f8b\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u5728\u6bcf\u4e00\u4e2a\u6d4b\u8bd5\u65b9\u6cd5\u6267\u884c\u4e4b\u540e\u6267\u884c\u4e00\u6b21\u3002\u000b<\/td><\/tr><tr><td>@BeforeClass<\/td><td>\u7528\u6765\u9759\u6001\u4fee\u9970\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u5728\u6240\u6709\u6d4b\u8bd5\u65b9\u6cd5\u4e4b\u524d\u53ea\u6267\u884c\u4e00\u6b21\u3002\u000b<\/td><\/tr><tr><td>@AfterClass<\/td><td>\u7528\u6765\u9759\u6001\u4fee\u9970\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u5728\u6240\u6709\u6d4b\u8bd5\u65b9\u6cd5\u4e4b\u540e\u53ea\u6267\u884c\u4e00\u6b21\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u5f00\u59cb\u6267\u884c\u7684\u65b9\u6cd5:\u521d\u59cb\u5316\u8d44\u6e90\u3002<br>\u6267\u884c\u5b8c\u4e4b\u540e\u7684\u65b9\u6cd5:\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n\n\n\n<p>Junit\u5e38\u7528\u6ce8\u89e3(Junit 5.xxxx\u7248\u672c)\u000b<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u6ce8\u89e3<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>@Test&nbsp;<\/td><td>\u6d4b\u8bd5\u65b9\u6cd5<\/td><\/tr><tr><td>@BeforeEach<\/td><td>\u7528\u6765\u4fee\u9970\u5b9e\u4f8b\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u5728\u6bcf\u4e00\u4e2a\u6d4b\u8bd5\u65b9\u6cd5\u6267\u884c\u4e4b\u524d\u6267\u884c\u4e00\u6b21\u3002<\/td><\/tr><tr><td>@AfterEach<\/td><td>\u7528\u6765\u4fee\u9970\u5b9e\u4f8b\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u5728\u6bcf\u4e00\u4e2a\u6d4b\u8bd5\u65b9\u6cd5\u6267\u884c\u4e4b\u540e\u6267\u884c\u4e00\u6b21\u3002\u000b<\/td><\/tr><tr><td>@BeforeAll<\/td><td>\u7528\u6765\u9759\u6001\u4fee\u9970\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u5728\u6240\u6709\u6d4b\u8bd5\u65b9\u6cd5\u4e4b\u524d\u53ea\u6267\u884c\u4e00\u6b21\u3002\u000b<\/td><\/tr><tr><td>@AfterAll<\/td><td>\u7528\u6765\u9759\u6001\u4fee\u9970\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u5728\u6240\u6709\u6d4b\u8bd5\u65b9\u6cd5\u4e4b\u540e\u53ea\u6267\u884c\u4e00\u6b21\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u53cd\u5c04<\/h2>\n\n\n\n<p>\u53cd\u5c04\u662f\u6307\u5bf9\u4e8e\u4efb\u4f55\u4e00\u4e2aClass\u7c7b\uff0c\u5728\"\u8fd0\u884c\u7684\u65f6\u5019\"\u90fd\u53ef\u4ee5\u76f4\u63a5\u5f97\u5230\u8fd9\u4e2a\u7c7b\u5168\u90e8\u6210\u5206\u3002<br>\u5728\u8fd0\u884c\u65f6,\u53ef\u4ee5\u76f4\u63a5\u5f97\u5230\u8fd9\u4e2a\u7c7b\u7684\u6784\u9020\u5668\u5bf9\u8c61\uff1aConstructor<br>\u5728\u8fd0\u884c\u65f6,\u53ef\u4ee5\u76f4\u63a5\u5f97\u5230\u8fd9\u4e2a\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u5bf9\u8c61\uff1aField<br>\u5728\u8fd0\u884c\u65f6,\u53ef\u4ee5\u76f4\u63a5\u5f97\u5230\u8fd9\u4e2a\u7c7b\u7684\u6210\u5458\u65b9\u6cd5\u5bf9\u8c61\uff1aMethod<br>\u8fd9\u79cd\u8fd0\u884c\u65f6\u52a8\u6001\u83b7\u53d6\u7c7b\u4fe1\u606f\u4ee5\u53ca\u52a8\u6001\u8c03\u7528\u7c7b\u4e2d\u6210\u5206\u7684\u80fd\u529b\u79f0\u4e3aJava\u8bed\u8a00\u7684\u53cd\u5c04\u673a\u5236\u3002<\/p>\n\n\n\n<p>\u53cd\u5c04\u7684\u5173\u952e\uff1a<br>\u53cd\u5c04\u7684\u7b2c\u4e00\u6b65\u90fd\u662f\u5148\u5f97\u5230\u7f16\u8bd1\u540e\u7684Class\u7c7b\u5bf9\u8c61\uff0c\u7136\u540e\u5c31\u53ef\u4ee5\u5f97\u5230Class\u7684\u5168\u90e8\u6210\u5206<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n   \u76ee\u6807\uff1a\u53cd\u5c04\u7684\u7b2c\u4e00\u6b65\uff1a\u83b7\u53d6Class\u5bf9\u8c61\n *\/\npublic class Test {\n    public static void main(String&#91;] args) throws Exception {\n        \/\/ 1\u3001Class\u7c7b\u4e2d\u7684\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\uff1aforName(\u5168\u9650\u540d\uff1a\u5305\u540d + \u7c7b\u540d)\n        Class c = Class.forName(\"com.itheima.d2_reflect_class.Student\");\n        System.out.println(c); \/\/ Student.class\n\n        \/\/ 2\u3001\u7c7b\u540d.class\n        Class c1 = Student.class;\n        System.out.println(c1);\n\n        \/\/ 3\u3001\u5bf9\u8c61.getClass() \u83b7\u53d6\u5bf9\u8c61\u5bf9\u5e94\u7c7b\u7684Class\u5bf9\u8c61\u3002\n        Student s = new Student();\n        Class c2 = s.getClass();\n        System.out.println(c2);\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u4f7f\u7528\u53cd\u5c04\u6280\u672f\u83b7\u53d6\u6784\u9020\u5668\u5bf9\u8c61\u5e76\u4f7f\u7528<\/p>\n\n\n\n<p>\u53cd\u5c04\u7684\u7b2c\u4e00\u6b65\u662f\u5148\u5f97\u5230\u7c7b\u5bf9\u8c61\uff0c\u7136\u540e\u4ece\u7c7b\u5bf9\u8c61\u4e2d\u83b7\u53d6\u7c7b\u7684\u6210\u5206\u5bf9\u8c61\u3002<br>Class\u7c7b\u4e2d\u7528\u4e8e\u83b7\u53d6\u6784\u9020\u5668\u7684\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>Constructor&lt;?&gt;[]&nbsp;getConstructors\u200b()<\/td><td>\u8fd4\u56de\u6240\u6709\u6784\u9020\u5668\u5bf9\u8c61\u7684\u6570\u7ec4\uff08\u53ea\u80fd\u62ffpublic\u7684\uff09<\/td><\/tr><tr><td>Constructor&lt;?&gt;[]&nbsp;getDeclaredConstructors\u200b()<\/td><td>\u8fd4\u56de\u6240\u6709\u6784\u9020\u5668\u5bf9\u8c61\u7684\u6570\u7ec4\uff0c\u5b58\u5728\u5c31\u80fd\u62ff\u5230<\/td><\/tr><tr><td>Constructor&lt;T&gt;&nbsp;getConstructor\u200b(Class&lt;?&gt;...&nbsp;parameterTypes)<\/td><td>\u8fd4\u56de\u5355\u4e2a\u6784\u9020\u5668\u5bf9\u8c61\uff08\u53ea\u80fd\u62ffpublic\u7684\uff09<\/td><\/tr><tr><td>Constructor&lt;T&gt;&nbsp;getDeclaredConstructor\u200b(Class&lt;?&gt;...&nbsp;parameterTypes)<\/td><td>\u8fd4\u56de\u5355\u4e2a\u6784\u9020\u5668\u5bf9\u8c61\uff0c\u5b58\u5728\u5c31\u80fd\u62ff\u5230<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u83b7\u53d6\u6784\u9020\u5668\u7684\u4f5c\u7528\u4f9d\u7136\u662f\u521d\u59cb\u5316\u4e00\u4e2a\u5bf9\u8c61\u8fd4\u56de\u3002<br>Constructor\u7c7b\u4e2d\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u7b26\u53f7<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>T&nbsp;newInstance\u200b(Object...&nbsp;initargs)<\/td><td>\u6839\u636e\u6307\u5b9a\u7684\u6784\u9020\u5668\u521b\u5efa\u5bf9\u8c61<\/td><\/tr><tr><td>public&nbsp;void&nbsp;&nbsp;setAccessible(boolean&nbsp;flag)<\/td><td>\u8bbe\u7f6e\u4e3atrue,\u8868\u793a\u53d6\u6d88\u8bbf\u95ee\u68c0\u67e5\uff0c\u8fdb\u884c\u66b4\u529b\u53cd\u5c04<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/Student.java\npublic class Student {\n    private String name;\n    private int age;\n\n    private Student(){\n        System.out.println(\"\u65e0\u53c2\u6570\u6784\u9020\u5668\u6267\u884c\uff01\");\n    }\n\n    public Student(String name, int age) {\n        System.out.println(\"\u6709\u53c2\u6570\u6784\u9020\u5668\u6267\u884c\uff01\");\n        this.name = name;\n        this.age = age;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public int getAge() {\n        return age;\n    }\n\n    public void setAge(int age) {\n        this.age = age;\n    }\n\n    @Override\n    public String toString() {\n        return \"Student{\" +\n                \"name='\" + name + '\\'' +\n                \", age=\" + age +\n                '}';\n    }\n}\n\/\/TestStudent01.java \nimport org.junit.Test;\n\nimport java.lang.reflect.Constructor;\n\n\/**\n    \u76ee\u6807\uff1a\u53cd\u5c04_\u83b7\u53d6Constructor\u6784\u9020\u5668\u5bf9\u8c61.\n\n    \u53cd\u5c04\u7684\u7b2c\u4e00\u6b65\u662f\u5148\u5f97\u5230Class\u7c7b\u5bf9\u8c61\u3002\uff08Class\u6587\u4ef6\uff09\n\n    \u53cd\u5c04\u4e2dClass\u7c7b\u578b\u83b7\u53d6\u6784\u9020\u5668\u63d0\u4f9b\u4e86\u5f88\u591a\u7684API:\n         1. Constructor getConstructor(Class... parameterTypes)\n            \u6839\u636e\u53c2\u6570\u5339\u914d\u83b7\u53d6\u67d0\u4e2a\u6784\u9020\u5668\uff0c\u53ea\u80fd\u62ffpublic\u4fee\u9970\u7684\u6784\u9020\u5668\uff0c\u51e0\u4e4e\u4e0d\u7528\uff01\n         2. Constructor getDeclaredConstructor(Class... parameterTypes)\n            \u6839\u636e\u53c2\u6570\u5339\u914d\u83b7\u53d6\u67d0\u4e2a\u6784\u9020\u5668\uff0c\u53ea\u8981\u7533\u660e\u5c31\u53ef\u4ee5\u5b9a\u4f4d\uff0c\u4e0d\u5173\u5fc3\u6743\u9650\u4fee\u9970\u7b26\uff0c\u5efa\u8bae\u4f7f\u7528\uff01\n         3. Constructor&#91;] getConstructors()\n            \u83b7\u53d6\u6240\u6709\u7684\u6784\u9020\u5668\uff0c\u53ea\u80fd\u62ffpublic\u4fee\u9970\u7684\u6784\u9020\u5668\u3002\u51e0\u4e4e\u4e0d\u7528\uff01\uff01\u592a\u5f31\u4e86\uff01\n         4. Constructor&#91;] getDeclaredConstructors()\n            \u83b7\u53d6\u6240\u6709\u7533\u660e\u7684\u6784\u9020\u5668\uff0c\u53ea\u8981\u4f60\u5199\u6211\u5c31\u80fd\u62ff\u5230\uff0c\u65e0\u6240\u8c13\u6743\u9650\u3002\u5efa\u8bae\u4f7f\u7528\uff01\uff01\n    \u5c0f\u7ed3\uff1a\n        \u83b7\u53d6\u7c7b\u7684\u5168\u90e8\u6784\u9020\u5668\u5bf9\u8c61\uff1a Constructor&#91;] getDeclaredConstructors()\n            -- \u83b7\u53d6\u6240\u6709\u7533\u660e\u7684\u6784\u9020\u5668\uff0c\u53ea\u8981\u4f60\u5199\u6211\u5c31\u80fd\u62ff\u5230\uff0c\u65e0\u6240\u8c13\u6743\u9650\u3002\u5efa\u8bae\u4f7f\u7528\uff01\uff01\n        \u83b7\u53d6\u7c7b\u7684\u67d0\u4e2a\u6784\u9020\u5668\u5bf9\u8c61\uff1aConstructor getDeclaredConstructor(Class... parameterTypes)\n            -- \u6839\u636e\u53c2\u6570\u5339\u914d\u83b7\u53d6\u67d0\u4e2a\u6784\u9020\u5668\uff0c\u53ea\u8981\u7533\u660e\u5c31\u53ef\u4ee5\u5b9a\u4f4d\uff0c\u4e0d\u5173\u5fc3\u6743\u9650\u4fee\u9970\u7b26\uff0c\u5efa\u8bae\u4f7f\u7528\uff01\n\n *\/\npublic class TestStudent01 {\n    \/\/ 1. getConstructors:\n    \/\/ \u83b7\u53d6\u5168\u90e8\u7684\u6784\u9020\u5668\uff1a\u53ea\u80fd\u83b7\u53d6public\u4fee\u9970\u7684\u6784\u9020\u5668\u3002\n    \/\/ Constructor&#91;] getConstructors()\n    @Test\n    public void getConstructors(){\n        \/\/ a.\u7b2c\u4e00\u6b65\uff1a\u83b7\u53d6\u7c7b\u5bf9\u8c61\n        Class c = Student.class;\n        \/\/ b.\u63d0\u53d6\u7c7b\u4e2d\u7684\u5168\u90e8\u7684\u6784\u9020\u5668\u5bf9\u8c61(\u8fd9\u91cc\u53ea\u80fd\u62ffpublic\u4fee\u9970)\n        Constructor&#91;] constructors = c.getConstructors();\n        \/\/ c.\u904d\u5386\u6784\u9020\u5668\n        for (Constructor constructor : constructors) {\n            System.out.println(constructor.getName() + \"===&gt;\" + constructor.getParameterCount());\n        }\n    }\n\n\n    \/\/ 2.getDeclaredConstructors():\n    \/\/ \u83b7\u53d6\u5168\u90e8\u7684\u6784\u9020\u5668\uff1a\u53ea\u8981\u4f60\u6562\u5199\uff0c\u8fd9\u91cc\u5c31\u80fd\u62ff\u5230\uff0c\u65e0\u6240\u8c13\u6743\u9650\u662f\u5426\u53ef\u53ca\u3002\n    @Test\n    public void getDeclaredConstructors(){\n        \/\/ a.\u7b2c\u4e00\u6b65\uff1a\u83b7\u53d6\u7c7b\u5bf9\u8c61\n        Class c = Student.class;\n        \/\/ b.\u63d0\u53d6\u7c7b\u4e2d\u7684\u5168\u90e8\u7684\u6784\u9020\u5668\u5bf9\u8c61\n        Constructor&#91;] constructors = c.getDeclaredConstructors();\n        \/\/ c.\u904d\u5386\u6784\u9020\u5668\n        for (Constructor constructor : constructors) {\n            System.out.println(constructor.getName() + \"===&gt;\" + constructor.getParameterCount());\n        }\n    }\n\n    \/\/ 3.getConstructor(Class... parameterTypes)\n    \/\/ \u83b7\u53d6\u67d0\u4e2a\u6784\u9020\u5668\uff1a\u53ea\u80fd\u62ffpublic\u4fee\u9970\u7684\u67d0\u4e2a\u6784\u9020\u5668\n    @Test\n    public void getConstructor() throws Exception {\n        \/\/ a.\u7b2c\u4e00\u6b65\uff1a\u83b7\u53d6\u7c7b\u5bf9\u8c61\n        Class c = Student.class;\n        \/\/ b.\u5b9a\u4f4d\u5355\u4e2a\u6784\u9020\u5668\u5bf9\u8c61 (\u6309\u7167\u53c2\u6570\u5b9a\u4f4d\u65e0\u53c2\u6570\u6784\u9020\u5668 \u53ea\u80fd\u62ffpublic\u4fee\u9970\u7684\u67d0\u4e2a\u6784\u9020\u5668)\n        Constructor cons = c.getConstructor();\n        System.out.println(cons.getName() + \"===&gt;\" + cons.getParameterCount());\n    }\n\n\n    \/\/ 4.getConstructor(Class... parameterTypes)\n    \/\/ \u83b7\u53d6\u67d0\u4e2a\u6784\u9020\u5668\uff1a\u53ea\u8981\u4f60\u6562\u5199\uff0c\u8fd9\u91cc\u5c31\u80fd\u62ff\u5230\uff0c\u65e0\u6240\u8c13\u6743\u9650\u662f\u5426\u53ef\u53ca\u3002\n    @Test\n    public void getDeclaredConstructor() throws Exception {\n        \/\/ a.\u7b2c\u4e00\u6b65\uff1a\u83b7\u53d6\u7c7b\u5bf9\u8c61\n        Class c = Student.class;\n        \/\/ b.\u5b9a\u4f4d\u5355\u4e2a\u6784\u9020\u5668\u5bf9\u8c61 (\u6309\u7167\u53c2\u6570\u5b9a\u4f4d\u65e0\u53c2\u6570\u6784\u9020\u5668)\n        Constructor cons = c.getDeclaredConstructor();\n        System.out.println(cons.getName() + \"===&gt;\" + cons.getParameterCount());\n\n        \/\/ c.\u5b9a\u4f4d\u67d0\u4e2a\u6709\u53c2\u6784\u9020\u5668\n        Constructor cons1 = c.getDeclaredConstructor(String.class, int.class);\n        System.out.println(cons1.getName() + \"===&gt;\" + cons1.getParameterCount());\n\n    }\n\n}\n\/\/TestStudent02.java\nimport org.junit.Test;\n\nimport java.lang.reflect.Constructor;\n\n\/**\n    \u76ee\u6807: \u53cd\u5c04_\u83b7\u53d6Constructor\u6784\u9020\u5668\u7136\u540e\u901a\u8fc7\u8fd9\u4e2a\u6784\u9020\u5668\u521d\u59cb\u5316\u5bf9\u8c61\u3002\n\n    \u53cd\u5c04\u83b7\u53d6Class\u4e2d\u7684\u6784\u9020\u5668\u5bf9\u8c61Constructor\u4f5c\u7528\uff1a\n            \u4e5f\u662f\u521d\u59cb\u5316\u5e76\u5f97\u5230\u7c7b\u7684\u4e00\u4e2a\u5bf9\u8c61\u8fd4\u56de\u3002\n\n    Constructor\u7684API:\n         1. T newInstance(Object... initargs)\n                \u521b\u5efa\u5bf9\u8c61\uff0c\u6ce8\u5165\u6784\u9020\u5668\u9700\u8981\u7684\u6570\u636e\u3002\n         2. void setAccessible(true)\n                \u4fee\u6539\u8bbf\u95ee\u6743\u9650\uff0ctrue\u4ee3\u8868\u66b4\u529b\u653b\u7834\u6743\u9650\uff0cfalse\u8868\u793a\u4fdd\u7559\u4e0d\u53ef\u8bbf\u95ee\u6743\u9650(\u66b4\u529b\u53cd\u5c04)\n    \u5c0f\u7ed3\uff1a\n        \u53ef\u4ee5\u901a\u8fc7\u5b9a\u4f4d\u7c7b\u7684\u6784\u9020\u5668\u5bf9\u8c61\u3002\n        \u5982\u679c\u6784\u9020\u5668\u5bf9\u8c61\u6ca1\u6709\u8bbf\u95ee\u6743\u9650\u53ef\u4ee5\u901a\u8fc7\uff1avoid setAccessible(true)\u6253\u5f00\u6743\u9650\n        \u6784\u9020\u5668\u53ef\u4ee5\u901a\u8fc7T newInstance(Object... initargs)\u8c03\u7528\u81ea\u5df1\uff0c\u4f20\u5165\u53c2\u6570\uff01\n *\/\npublic class TestStudent02 {\n    \/\/ 1.\u8c03\u7528\u6784\u9020\u5668\u5f97\u5230\u4e00\u4e2a\u7c7b\u7684\u5bf9\u8c61\u8fd4\u56de\u3002\n    @Test\n    public void getDeclaredConstructor() throws Exception {\n        \/\/ a.\u7b2c\u4e00\u6b65\uff1a\u83b7\u53d6\u7c7b\u5bf9\u8c61\n        Class c = Student.class;\n        \/\/ b.\u5b9a\u4f4d\u5355\u4e2a\u6784\u9020\u5668\u5bf9\u8c61 (\u6309\u7167\u53c2\u6570\u5b9a\u4f4d\u65e0\u53c2\u6570\u6784\u9020\u5668)\n        Constructor cons = c.getDeclaredConstructor();\n        System.out.println(cons.getName() + \"===&gt;\" + cons.getParameterCount());\n\n        \/\/ \u5982\u679c\u9047\u5230\u4e86\u79c1\u6709\u7684\u6784\u9020\u5668\uff0c\u53ef\u4ee5\u66b4\u529b\u53cd\u5c04\n        cons.setAccessible(true); \/\/ \u6743\u9650\u88ab\u6253\u5f00\n\n        Student s = (Student) cons.newInstance();\n        System.out.println(s);\n\n        System.out.println(\"-------------------\");\n\n        \/\/ c.\u5b9a\u4f4d\u67d0\u4e2a\u6709\u53c2\u6784\u9020\u5668\n        Constructor cons1 = c.getDeclaredConstructor(String.class, int.class);\n        System.out.println(cons1.getName() + \"===&gt;\" + cons1.getParameterCount());\n\n        Student s1 = (Student) cons1.newInstance(\"\u5b59\u609f\u7a7a\", 1000);\n        System.out.println(s1);\n    }\n\n}<\/code><\/pre>\n\n\n\n<p>\u4f7f\u7528\u53cd\u5c04\u6280\u672f\u83b7\u53d6\u6210\u5458\u53d8\u91cf\u5bf9\u8c61\u5e76\u4f7f\u7528<\/p>\n\n\n\n<p>\u53cd\u5c04\u7684\u7b2c\u4e00\u6b65\u662f\u5148\u5f97\u5230\u7c7b\u5bf9\u8c61\uff0c\u7136\u540e\u4ece\u7c7b\u5bf9\u8c61\u4e2d\u83b7\u53d6\u7c7b\u7684\u6210\u5206\u5bf9\u8c61\u3002<br>Class\u7c7b\u4e2d\u7528\u4e8e\u83b7\u53d6\u6210\u5458\u53d8\u91cf\u7684\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>Field[]&nbsp;getFields\u200b()<\/td><td>\u8fd4\u56de\u6240\u6709\u6210\u5458\u53d8\u91cf\u5bf9\u8c61\u7684\u6570\u7ec4\uff08\u53ea\u80fd\u62ffpublic\u7684\uff09<\/td><\/tr><tr><td>Field[]&nbsp;getDeclaredFields\u200b()<\/td><td>\u8fd4\u56de\u6240\u6709\u6210\u5458\u53d8\u91cf\u5bf9\u8c61\u7684\u6570\u7ec4\uff0c\u5b58\u5728\u5c31\u80fd\u62ff\u5230<\/td><\/tr><tr><td>Field&nbsp;getField\u200b(String&nbsp;name)<\/td><td>\u8fd4\u56de\u5355\u4e2a\u6210\u5458\u53d8\u91cf\u5bf9\u8c61\uff08\u53ea\u80fd\u62ffpublic\u7684\uff09<\/td><\/tr><tr><td>Field&nbsp;getDeclaredField\u200b(String&nbsp;name)<\/td><td>\u8fd4\u56de\u5355\u4e2a\u6210\u5458\u53d8\u91cf\u5bf9\u8c61\uff0c\u5b58\u5728\u5c31\u80fd\u62ff\u5230<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u83b7\u53d6\u6210\u5458\u53d8\u91cf\u7684\u4f5c\u7528\u4f9d\u7136\u662f\u5728\u67d0\u4e2a\u5bf9\u8c61\u4e2d\u53d6\u503c\u3001\u8d4b\u503c<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u7b26\u53f7<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>void&nbsp;set\u200b(Object&nbsp;obj,&nbsp;Object&nbsp;value)\uff1a<\/td><td>\u8d4b\u503c<\/td><\/tr><tr><td>Object&nbsp;get\u200b(Object&nbsp;obj)<\/td><td>\u83b7\u53d6\u503c\u3002&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>import org.junit.Test;\n\nimport java.io.File;\nimport java.lang.reflect.Field;\n\n\/**\n     \u76ee\u6807\uff1a\u53cd\u5c04_\u83b7\u53d6Field\u6210\u5458\u53d8\u91cf\u5bf9\u8c61\u3002\n\n     \u53cd\u5c04\u7684\u7b2c\u4e00\u6b65\u662f\u5148\u5f97\u5230Class\u7c7b\u5bf9\u8c61\u3002\n\n     1\u3001Field getField(String name);\n            \u6839\u636e\u6210\u5458\u53d8\u91cf\u540d\u83b7\u5f97\u5bf9\u5e94Field\u5bf9\u8c61\uff0c\u53ea\u80fd\u83b7\u5f97public\u4fee\u9970\n     2.Field getDeclaredField(String name);\n            \u6839\u636e\u6210\u5458\u53d8\u91cf\u540d\u83b7\u5f97\u5bf9\u5e94Field\u5bf9\u8c61\uff0c\u53ea\u8981\u7533\u660e\u4e86\u5c31\u53ef\u4ee5\u5f97\u5230\n     3.Field&#91;] getFields();\n            \u83b7\u5f97\u6240\u6709\u7684\u6210\u5458\u53d8\u91cf\u5bf9\u5e94\u7684Field\u5bf9\u8c61\uff0c\u53ea\u80fd\u83b7\u5f97public\u7684\n     4.Field&#91;] getDeclaredFields();\n            \u83b7\u5f97\u6240\u6709\u7684\u6210\u5458\u53d8\u91cf\u5bf9\u5e94\u7684Field\u5bf9\u8c61\uff0c\u53ea\u8981\u7533\u660e\u4e86\u5c31\u53ef\u4ee5\u5f97\u5230\n     \u5c0f\u7ed3\uff1a\n        \u83b7\u53d6\u5168\u90e8\u6210\u5458\u53d8\u91cf\uff1agetDeclaredFields\n        \u83b7\u53d6\u67d0\u4e2a\u6210\u5458\u53d8\u91cf\uff1agetDeclaredField\n *\/\npublic class FieldDemo01 {\n    \/**\n     * 1.\u83b7\u53d6\u5168\u90e8\u7684\u6210\u5458\u53d8\u91cf\u3002\n     * Field&#91;] getDeclaredFields();\n     *  \u83b7\u5f97\u6240\u6709\u7684\u6210\u5458\u53d8\u91cf\u5bf9\u5e94\u7684Field\u5bf9\u8c61\uff0c\u53ea\u8981\u7533\u660e\u4e86\u5c31\u53ef\u4ee5\u5f97\u5230\n     *\/\n    @Test\n    public void getDeclaredFields(){\n        \/\/ a.\u5b9a\u4f4dClass\u5bf9\u8c61\n        Class c = Student.class;\n        \/\/ b.\u5b9a\u4f4d\u5168\u90e8\u6210\u5458\u53d8\u91cf\n        Field&#91;] fields = c.getDeclaredFields();\n        \/\/ c.\u904d\u5386\u4e00\u4e0b\n        for (Field field : fields) {\n            System.out.println(field.getName() + \"==&gt;\" + field.getType());\n        }\n    }\n\n    \/**\n        2.\u83b7\u53d6\u67d0\u4e2a\u6210\u5458\u53d8\u91cf\u5bf9\u8c61 Field getDeclaredField(String name);\n     *\/\n    @Test\n    public void getDeclaredField() throws Exception {\n        \/\/ a.\u5b9a\u4f4dClass\u5bf9\u8c61\n        Class c = Student.class;\n        \/\/ b.\u6839\u636e\u540d\u79f0\u5b9a\u4f4d\u67d0\u4e2a\u6210\u5458\u53d8\u91cf\n        Field f = c.getDeclaredField(\"age\");\n        System.out.println(f.getName() +\"===&gt;\" + f.getType());\n    }\n\n}\n\nimport org.junit.Test;\n\nimport java.lang.reflect.Field;\n\n\/**\n    \u76ee\u6807\uff1a\u53cd\u5c04\u83b7\u53d6\u6210\u5458\u53d8\u91cf: \u53d6\u503c\u548c\u8d4b\u503c\u3002\n\n    Field\u7684\u65b9\u6cd5\uff1a\u7ed9\u6210\u5458\u53d8\u91cf\u8d4b\u503c\u548c\u53d6\u503c\n        void set(Object obj, Object value)\uff1a\u7ed9\u5bf9\u8c61\u6ce8\u5165\u67d0\u4e2a\u6210\u5458\u53d8\u91cf\u6570\u636e\n        Object get(Object obj):\u83b7\u53d6\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u7684\u503c\u3002\n        void setAccessible(true);\u66b4\u529b\u53cd\u5c04\uff0c\u8bbe\u7f6e\u4e3a\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u79c1\u6709\u7c7b\u578b\u7684\u5c5e\u6027\u3002\n        Class getType(); \u83b7\u53d6\u5c5e\u6027\u7684\u7c7b\u578b\uff0c\u8fd4\u56deClass\u5bf9\u8c61\u3002\n        String getName(); \u83b7\u53d6\u5c5e\u6027\u7684\u540d\u79f0\u3002\n *\/\npublic class FieldDemo02 {\n    @Test\n    public void setField() throws Exception {\n        \/\/ a.\u53cd\u5c04\u7b2c\u4e00\u6b65\uff0c\u83b7\u53d6\u7c7b\u5bf9\u8c61\n        Class c = Student.class;\n        \/\/ b.\u63d0\u53d6\u67d0\u4e2a\u6210\u5458\u53d8\u91cf\n        Field ageF = c.getDeclaredField(\"age\");\n\n        ageF.setAccessible(true); \/\/ \u66b4\u529b\u6253\u5f00\u6743\u9650\n\n        \/\/ c.\u8d4b\u503c\n        Student s = new Student();\n        ageF.set(s , 18);  \/\/ s.setAge(18);\n        System.out.println(s);\n\n        \/\/ d\u3001\u53d6\u503c\n        int age = (int) ageF.get(s);\n        System.out.println(age);\n\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u4f7f\u7528\u53cd\u5c04\u6280\u672f\u83b7\u53d6\u65b9\u6cd5\u5bf9\u8c61\u5e76\u4f7f\u7528<br>\u53cd\u5c04\u7684\u7b2c\u4e00\u6b65\u662f\u5148\u5f97\u5230\u7c7b\u5bf9\u8c61\uff0c\u7136\u540e\u4ece\u7c7b\u5bf9\u8c61\u4e2d\u83b7\u53d6\u7c7b\u7684\u6210\u5206\u5bf9\u8c61\u3002<br>Class\u7c7b\u4e2d\u7528\u4e8e\u83b7\u53d6\u6210\u5458\u65b9\u6cd5\u7684\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u65b9\u6cd5<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>Method[]&nbsp;getMethods\u200b()<\/td><td>\u8fd4\u56de\u6240\u6709\u6210\u5458\u65b9\u6cd5\u5bf9\u8c61\u7684\u6570\u7ec4\uff08\u53ea\u80fd\u62ffpublic\u7684\uff09<\/td><\/tr><tr><td>Method[]&nbsp;getDeclaredMethods\u200b()<\/td><td>\u8fd4\u56de\u6240\u6709\u6210\u5458\u65b9\u6cd5\u5bf9\u8c61\u7684\u6570\u7ec4\uff0c\u5b58\u5728\u5c31\u80fd\u62ff\u5230<\/td><\/tr><tr><td>Method&nbsp;getMethod\u200b(String&nbsp;name,&nbsp;Class&lt;?&gt;...&nbsp;parameterTypes)&nbsp;<\/td><td>\u8fd4\u56de\u5355\u4e2a\u6210\u5458\u65b9\u6cd5\u5bf9\u8c61\uff08\u53ea\u80fd\u62ffpublic\u7684\uff09<\/td><\/tr><tr><td>Method&nbsp;getDeclaredMethod\u200b(String&nbsp;name,&nbsp;Class&lt;?&gt;...&nbsp;parameterTypes)<\/td><td>\u8fd4\u56de\u5355\u4e2a\u6210\u5458\u65b9\u6cd5\u5bf9\u8c61\uff0c\u5b58\u5728\u5c31\u80fd\u62ff\u5230<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Method\u7c7b\u4e2d\u7528\u4e8e\u89e6\u53d1\u6267\u884c\u7684\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u7b26\u53f7<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>Object&nbsp;invoke\u200b(Object&nbsp;obj,&nbsp;Object...&nbsp;args)<\/td><td>\u8fd0\u884c\u65b9\u6cd5\u53c2\u6570\u4e00\uff1a\u7528obj\u5bf9\u8c61\u8c03\u7528\u8be5\u65b9\u6cd5\u53c2\u6570\u4e8c\uff1a\u8c03\u7528\u65b9\u6cd5\u7684\u4f20\u9012\u7684\u53c2\u6570\uff08\u5982\u679c\u6ca1\u6709\u5c31\u4e0d\u5199\uff09\u8fd4\u56de\u503c\uff1a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\uff08\u5982\u679c\u6ca1\u6709\u5c31\u4e0d\u5199\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/dog.java\npublic class Dog {\n    private String name ;\n    public Dog(){\n    }\n\n    public Dog(String name) {\n        this.name = name;\n    }\n\n    public void run(){\n        System.out.println(\"\u72d7\u8dd1\u7684\u8d3c\u5feb~~\");\n    }\n\n    private void eat(){\n        System.out.println(\"\u72d7\u5403\u9aa8\u5934\");\n    }\n\n    private String eat(String name){\n        System.out.println(\"\u72d7\u5403\" + name);\n        return \"\u5403\u7684\u5f88\u5f00\u5fc3\uff01\";\n    }\n\n    public static void inAddr(){\n        System.out.println(\"\u5728\u9ed1\u9a6c\u5b66\u4e60Java!\");\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n}\n\/\/MethodDemo01.java\nimport org.junit.Test;\n\nimport java.lang.reflect.Method;\n\n\/**\n    \u76ee\u6807\uff1a\u53cd\u5c04\u2014\u2014\u83b7\u53d6Method\u65b9\u6cd5\u5bf9\u8c61\n\n    \u53cd\u5c04\u83b7\u53d6\u7c7b\u7684Method\u65b9\u6cd5\u5bf9\u8c61\uff1a\n         1\u3001Method getMethod(String name,Class...args);\n             \u6839\u636e\u65b9\u6cd5\u540d\u548c\u53c2\u6570\u7c7b\u578b\u83b7\u5f97\u5bf9\u5e94\u7684\u65b9\u6cd5\u5bf9\u8c61\uff0c\u53ea\u80fd\u83b7\u5f97public\u7684\n\n         2\u3001Method getDeclaredMethod(String name,Class...args);\n             \u6839\u636e\u65b9\u6cd5\u540d\u548c\u53c2\u6570\u7c7b\u578b\u83b7\u5f97\u5bf9\u5e94\u7684\u65b9\u6cd5\u5bf9\u8c61\uff0c\u5305\u62ecprivate\u7684\n\n         3\u3001Method&#91;] getMethods();\n             \u83b7\u5f97\u7c7b\u4e2d\u7684\u6240\u6709\u6210\u5458\u65b9\u6cd5\u5bf9\u8c61\uff0c\u8fd4\u56de\u6570\u7ec4\uff0c\u53ea\u80fd\u83b7\u5f97public\u4fee\u9970\u7684\u4e14\u5305\u542b\u7236\u7c7b\u7684\n\n         4\u3001Method&#91;] getDeclaredMethods();\n            \u83b7\u5f97\u7c7b\u4e2d\u7684\u6240\u6709\u6210\u5458\u65b9\u6cd5\u5bf9\u8c61\uff0c\u8fd4\u56de\u6570\u7ec4,\u53ea\u83b7\u5f97\u672c\u7c7b\u7533\u660e\u7684\u65b9\u6cd5\u3002\n\n    Method\u7684\u65b9\u6cd5\u6267\u884c\uff1a\n        Object invoke(Object obj, Object... args)\n          \u53c2\u6570\u4e00\uff1a\u89e6\u53d1\u7684\u662f\u54ea\u4e2a\u5bf9\u8c61\u7684\u65b9\u6cd5\u6267\u884c\u3002\n          \u53c2\u6570\u4e8c\uff1a args\uff1a\u8c03\u7528\u65b9\u6cd5\u65f6\u4f20\u9012\u7684\u5b9e\u9645\u53c2\u6570\n *\/\npublic class MethodDemo01 {\n    \/**\n     * 1.\u83b7\u5f97\u7c7b\u4e2d\u7684\u6240\u6709\u6210\u5458\u65b9\u6cd5\u5bf9\u8c61\n     *\/\n    @Test\n    public void getDeclaredMethods(){\n        \/\/ a.\u83b7\u53d6\u7c7b\u5bf9\u8c61\n        Class c = Dog.class;\n        \/\/ b.\u63d0\u53d6\u5168\u90e8\u65b9\u6cd5\uff1b\u5305\u62ec\u79c1\u6709\u7684\n        Method&#91;] methods = c.getDeclaredMethods();\n        \/\/ c.\u904d\u5386\u5168\u90e8\u65b9\u6cd5\n        for (Method method : methods) {\n            System.out.println(method.getName() +\" \u8fd4\u56de\u503c\u7c7b\u578b\uff1a\" + method.getReturnType() + \" \u53c2\u6570\u4e2a\u6570\uff1a\" + method.getParameterCount());\n        }\n    }\n\n    \/**\n     * 2. \u83b7\u53d6\u67d0\u4e2a\u65b9\u6cd5\u5bf9\u8c61\n     *\/\n    @Test\n    public void getDeclardMethod() throws Exception {\n        \/\/ a.\u83b7\u53d6\u7c7b\u5bf9\u8c61\n        Class c = Dog.class;\n        \/\/ b.\u63d0\u53d6\u5355\u4e2a\u65b9\u6cd5\u5bf9\u8c61\n        Method m = c.getDeclaredMethod(\"eat\");\n        Method m2 = c.getDeclaredMethod(\"eat\", String.class);\n\n        \/\/ \u66b4\u529b\u6253\u5f00\u6743\u9650\u4e86\n        m.setAccessible(true);\n        m2.setAccessible(true);\n\n        \/\/ c.\u89e6\u53d1\u65b9\u6cd5\u7684\u6267\u884c\n        Dog d = new Dog();\n        \/\/ \u6ce8\u610f\uff1a\u65b9\u6cd5\u5982\u679c\u662f\u6ca1\u6709\u7ed3\u679c\u56de\u6765\u7684\uff0c\u90a3\u4e48\u8fd4\u56de\u7684\u662fnull.\n        Object result = m.invoke(d);\n        System.out.println(result);\n\n        Object result2 = m2.invoke(d, \"\u9aa8\u5934\");\n        System.out.println(result2);\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u53cd\u5c04\u7684\u4f5c\u7528-\u7ed5\u8fc7\u7f16\u8bd1\u9636\u6bb5\u4e3a\u96c6\u5408\u6dfb\u52a0\u6570\u636e<br>\u53cd\u5c04\u662f\u4f5c\u7528\u5728\u8fd0\u884c\u65f6\u7684\u6280\u672f\uff0c\u6b64\u65f6\u96c6\u5408\u7684\u6cdb\u578b\u5c06\u4e0d\u80fd\u4ea7\u751f\u7ea6\u675f\u4e86\uff0c\u6b64\u65f6\u662f\u53ef\u4ee5\u4e3a\u96c6\u5408\u5b58\u5165\u5176\u4ed6\u4efb\u610f\u7c7b\u578b\u7684\u5143\u7d20\u7684\u3002<br>\u6cdb\u578b\u53ea\u662f\u5728\u7f16\u8bd1\u9636\u6bb5\u53ef\u4ee5\u7ea6\u675f\u96c6\u5408\u53ea\u80fd\u64cd\u4f5c\u67d0\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u5728\u7f16\u8bd1\u6210Class\u6587\u4ef6\u8fdb\u5165\u8fd0\u884c\u9636\u6bb5\u7684\u65f6\u5019\uff0c\u5176\u771f\u5b9e\u7c7b\u578b\u90fd\u662fArrayList\u4e86\uff0c\u6cdb\u578b\u76f8\u5f53\u4e8e\u88ab\u64e6\u9664\u4e86\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.lang.reflect.Method;\nimport java.util.ArrayList;\n\npublic class ReflectDemo {\n    public static void main(String&#91;] args) throws Exception {\n        \/\/ \u9700\u6c42\uff1a\u53cd\u5c04\u5b9e\u73b0\u6cdb\u578b\u64e6\u9664\u540e\uff0c\u52a0\u5165\u5176\u4ed6\u7c7b\u578b\u7684\u5143\u7d20\n        ArrayList&lt;String&gt; lists1 = new ArrayList&lt;&gt;();\n        ArrayList&lt;Integer&gt; lists2 = new ArrayList&lt;&gt;();\n\n        System.out.println(lists1.getClass());\n        System.out.println(lists2.getClass());\n\n        System.out.println(lists1.getClass() ==  lists2.getClass());  \/\/ ArrayList.class\n\n        System.out.println(\"---------------------------\");\n        ArrayList&lt;Integer&gt; lists3 = new ArrayList&lt;&gt;();\n        lists3.add(23);\n        lists3.add(22);\n        \/\/ lists3.add(\"\u9ed1\u9a6c\");\n\n        Class c = lists3.getClass(); \/\/ ArrayList.class  ===&gt; public boolean add(E e)\n        \/\/ \u5b9a\u4f4dc\u7c7b\u4e2d\u7684add\u65b9\u6cd5\n        Method add = c.getDeclaredMethod(\"add\", Object.class);\n        boolean rs = (boolean) add.invoke(lists3, \"\u9ed1\u9a6c\");\n        System.out.println(rs);\n\n        System.out.println(lists3);\n\n        ArrayList list4 = lists3;\n        list4.add(\"\u767d\u9a6c\");\n        list4.add(false);\n        System.out.println(lists3);\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u53cd\u5c04\u505a\u901a\u7528\u6846\u67b6<br>\u9700\u6c42\uff1a\u7ed9\u4f60\u4efb\u610f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5728\u4e0d\u6e05\u695a\u5bf9\u8c61\u5b57\u6bb5\u7684\u60c5\u51b5\u53ef\u4ee5\uff0c\u53ef\u4ee5\u628a\u5bf9\u8c61\u7684\u5b57\u6bb5\u540d\u79f0\u548c\u5bf9\u5e94\u503c\u5b58\u50a8\u5230\u6587\u4ef6\u4e2d\u53bb\u3002<br>\u9700\u6c42\uff1a<br>\u7ed9\u4f60\u4efb\u610f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5728\u4e0d\u6e05\u695a\u5bf9\u8c61\u5b57\u6bb5\u7684\u60c5\u51b5\u53ef\u4ee5\uff0c\u53ef\u4ee5\u628a\u5bf9\u8c61\u7684\u5b57\u6bb5\u540d\u79f0\u548c\u5bf9\u5e94\u503c\u5b58\u50a8\u5230\u6587\u4ef6\u4e2d\u53bb\u3002<br>\u5206\u6790<br>\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63a5\u6536\u4efb\u610f\u7c7b\u7684\u5bf9\u8c61\u3002<br>\u6bcf\u6b21\u6536\u5230\u4e00\u4e2a\u5bf9\u8c61\u540e\uff0c\u9700\u8981\u89e3\u6790\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5168\u90e8\u6210\u5458\u53d8\u91cf\u540d\u79f0\u3002<br>\u8fd9\u4e2a\u5bf9\u8c61\u53ef\u80fd\u662f\u4efb\u610f\u7684\uff0c\u90a3\u4e48\u600e\u4e48\u6837\u624d\u53ef\u4ee5\u77e5\u9053\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5168\u90e8\u6210\u5458\u53d8\u91cf\u540d\u79f0\u5462\uff1f<br>\u4f7f\u7528\u53cd\u5c04\u83b7\u53d6\u5bf9\u8c61\u7684Class\u7c7b\u5bf9\u8c61\uff0c\u7136\u540e\u83b7\u53d6\u5168\u90e8\u6210\u5458\u53d8\u91cf\u4fe1\u606f\u3002<br>\u904d\u5386\u6210\u5458\u53d8\u91cf\u4fe1\u606f\uff0c\u7136\u540e\u63d0\u53d6\u672c\u6210\u5458\u53d8\u91cf\u5728\u5bf9\u8c61\u4e2d\u7684\u5177\u4f53\u503c<br>\u5b58\u5165\u6210\u5458\u53d8\u91cf\u540d\u79f0\u548c\u503c\u5230\u6587\u4ef6\u4e2d\u53bb\u5373\u53ef\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/Student.java\npublic class Student {\r\n    private String name;\r\n    private char sex;\r\n    private int age;\r\n    private String className;\r\n    private String hobby;\r\n\r\n    public Student(){\r\n\r\n    }\r\n\r\n    public Student(String name, char sex, int age, String className, String hobby) {\r\n        this.name = name;\r\n        this.sex = sex;\r\n        this.age = age;\r\n        this.className = className;\r\n        this.hobby = hobby;\r\n    }\r\n\r\n\r\n    public String getName() {\r\n        return name;\r\n    }\r\n\r\n    public void setName(String name) {\r\n        this.name = name;\r\n    }\r\n\r\n    public char getSex() {\r\n        return sex;\r\n    }\r\n\r\n    public void setSex(char sex) {\r\n        this.sex = sex;\r\n    }\r\n\r\n    public int getAge() {\r\n        return age;\r\n    }\r\n\r\n    public void setAge(int age) {\r\n        this.age = age;\r\n    }\r\n\r\n    public String getClassName() {\r\n        return className;\r\n    }\r\n\r\n    public void setClassName(String className) {\r\n        this.className = className;\r\n    }\r\n\r\n    public String getHobby() {\r\n        return hobby;\r\n    }\r\n\r\n    public void setHobby(String hobby) {\r\n        this.hobby = hobby;\r\n    }\r\n}\n\n\/\/Teacher.java\npublic class Teacher {\r\n    private String name;\r\n    private char sex;\r\n    private double salary;\r\n\r\n    public Teacher(){\r\n\r\n    }\r\n\r\n    public Teacher(String name, char sex, double salary) {\r\n        this.name = name;\r\n        this.sex = sex;\r\n        this.salary = salary;\r\n    }\r\n\r\n    public String getName() {\r\n        return name;\r\n    }\r\n\r\n    public void setName(String name) {\r\n        this.name = name;\r\n    }\r\n\r\n    public char getSex() {\r\n        return sex;\r\n    }\r\n\r\n    public void setSex(char sex) {\r\n        this.sex = sex;\r\n    }\r\n\r\n    public double getSalary() {\r\n        return salary;\r\n    }\r\n\r\n    public void setSalary(double salary) {\r\n        this.salary = salary;\r\n    }\r\n}\n\n\/\/MybatisUtil.java\nimport java.io.FileOutputStream;\r\nimport java.io.PrintStream;\r\nimport java.lang.reflect.Field;\r\n\r\npublic class MybatisUtil {\r\n    \/**\r\n     \u4fdd\u5b58\u4efb\u610f\u7c7b\u578b\u7684\u5bf9\u8c61\r\n     * @param obj\r\n     *\/\r\n    public static void save(Object obj){\r\n        try (\r\n                PrintStream ps = new PrintStream(new FileOutputStream(\"junit-reflect-annotation-proxy-app\/src\/data.txt\", true));\r\n        ){\r\n            \/\/ 1\u3001\u63d0\u53d6\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5168\u90e8\u6210\u5458\u53d8\u91cf\uff1a\u53ea\u6709\u53cd\u5c04\u53ef\u4ee5\u89e3\u51b3\r\n            Class c = obj.getClass();  \/\/   c.getSimpleName()\u83b7\u53d6\u5f53\u524d\u7c7b\u540d   c.getName\u83b7\u53d6\u5168\u9650\u540d\uff1a\u5305\u540d+\u7c7b\u540d\r\n            ps.println(\"================\" + c.getSimpleName() + \"================\");\r\n\r\n            \/\/ 2\u3001\u63d0\u53d6\u5b83\u7684\u5168\u90e8\u6210\u5458\u53d8\u91cf\r\n            Field&#91;] fields = c.getDeclaredFields();\r\n            \/\/ 3\u3001\u83b7\u53d6\u6210\u5458\u53d8\u91cf\u7684\u4fe1\u606f\r\n            for (Field field : fields) {\r\n                String name = field.getName();\r\n                \/\/ \u63d0\u53d6\u672c\u6210\u5458\u53d8\u91cf\u5728obj\u5bf9\u8c61\u4e2d\u7684\u503c\uff08\u53d6\u503c\uff09\r\n                field.setAccessible(true);\r\n                String value = field.get(obj) + \"\";\r\n                ps.println(name  + \"=\" + value);\r\n            }\r\n        } catch (Exception e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n}\n\n\/\/ReflectDemo.java\nimport java.util.Date;\r\nimport java.util.Properties;\r\n\r\n\/**\r\n   \u76ee\u6807\uff1a\u63d0\u4f9b\u4e00\u4e2a\u901a\u7528\u6846\u67b6\uff0c\u652f\u6301\u4fdd\u5b58\u6240\u6709\u5bf9\u8c61\u7684\u5177\u4f53\u4fe1\u606f\u3002\r\n *\/\r\npublic class ReflectDemo {\r\n    public static void main(String&#91;] args) throws Exception {\r\n        Student s = new Student();\r\n        s.setName(\"\u732a\u516b\u6212\");\r\n        s.setClassName(\"\u897f\u5929\u8dd1\u8def1\u73ed\");\r\n        s.setAge(1000);\r\n        s.setHobby(\"\u5403\uff0c\u7761\");\r\n        s.setSex('\u7537');\r\n        MybatisUtil.save(s);\r\n\r\n        Teacher t = new Teacher();\r\n        t.setName(\"\u6ce2\u4ed4\");\r\n        t.setSex('\u7537');\r\n        t.setSalary(6000);\r\n        MybatisUtil.save(t);\r\n    }\r\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u6ce8\u89e3<\/h2>\n\n\n\n<p>Java \u6ce8\u89e3\uff08Annotation\uff09\u53c8\u79f0 Java \u6807\u6ce8\uff0c\u662f JDK5.0 \u5f15\u5165\u7684\u4e00\u79cd\u6ce8\u91ca\u673a\u5236\u3002<br>Java \u8bed\u8a00\u4e2d\u7684\u7c7b\u3001\u6784\u9020\u5668\u3001\u65b9\u6cd5\u3001\u6210\u5458\u53d8\u91cf\u3001\u53c2\u6570\u7b49\u90fd\u53ef\u4ee5\u88ab\u6ce8\u89e3\u8fdb\u884c\u6807\u6ce8\u3002<br>\u5bf9Java\u4e2d\u7c7b\u3001\u65b9\u6cd5\u3001\u6210\u5458\u53d8\u91cf\u505a\u6807\u8bb0\uff0c\u7136\u540e\u8fdb\u884c\u7279\u6b8a\u5904\u7406\uff0c\u81f3\u4e8e\u5230\u5e95\u505a\u4f55\u79cd\u5904\u7406\u7531\u4e1a\u52a1\u9700\u6c42\u6765\u51b3\u5b9a\u3002<br>\u4f8b\u5982\uff1aJUnit\u6846\u67b6\u4e2d\uff0c\u6807\u8bb0\u4e86\u6ce8\u89e3@Test\u7684\u65b9\u6cd5\u5c31\u53ef\u4ee5\u88ab\u5f53\u6210\u6d4b\u8bd5\u65b9\u6cd5\u6267\u884c\uff0c\u800c\u6ca1\u6709\u6807\u8bb0\u7684\u5c31\u4e0d\u80fd\u5f53\u6210\u6d4b\u8bd5\u65b9\u6cd5\u6267\u884c\u3002<\/p>\n\n\n\n<p>\u81ea\u5b9a\u4e49\u6ce8\u89e3 --- \u683c\u5f0f<br>\u81ea\u5b9a\u4e49\u6ce8\u89e3\u5c31\u662f\u81ea\u5df1\u505a\u4e00\u4e2a\u6ce8\u89e3\u6765\u4f7f\u7528\u3002\u6bcf\u4e2a\u5c5e\u6027\u90fd\u5fc5\u987b\u6709\u503c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public @interface \u6ce8\u89e3\u540d\u79f0 {\n    public \u5c5e\u6027\u7c7b\u578b \u5c5e\u6027\u540d() default \u9ed8\u8ba4\u503c ;\n}\n\npublic @interface Book {\r\n    String value(); \/\/ \u7279\u6b8a\u5c5e\u6027\r\n    double price() ;\r\n    \/\/double price() default 9.9;\r\n}\n\npublic @interface MyBook {\r\n    String name();\r\n    String&#91;] authors();\r\n    double price();\r\n}\n\n\/**\r\n   \u76ee\u6807\uff1a\u5b66\u4f1a\u81ea\u5b9a\u4e49\u6ce8\u89e3\u3002\u638c\u63e1\u5176\u5b9a\u4e49\u683c\u5f0f\u548c\u8bed\u6cd5\u3002\r\n *\/\r\n@MyBook(name=\"\u300a\u7cbe\u901aJavaSE\u300b\",authors = {\"\u9ed1\u9a6c\", \"dlei\"} , price = 199.5)\r\n\/\/@Book(value = \"\/delete\")\r\n\/\/ @Book(\"\/delete\")\r\n@Book(value = \"\/delete\", price = 23.5)\r\n\/\/@Book(\"\/delete\")\r\npublic class AnnotationDemo1 {\r\n\r\n    @MyBook(name=\"\u300a\u7cbe\u901aJavaSE2\u300b\",authors = {\"\u9ed1\u9a6c\", \"dlei\"} , price = 199.5)\r\n    private AnnotationDemo1(){\r\n\r\n    }\r\n\r\n    @MyBook(name=\"\u300a\u7cbe\u901aJavaSE1\u300b\",authors = {\"\u9ed1\u9a6c\", \"dlei\"} , price = 199.5)\r\n    public static void main(String&#91;] args) {\r\n        @MyBook(name=\"\u300a\u7cbe\u901aJavaSE2\u300b\",authors = {\"\u9ed1\u9a6c\", \"dlei\"} , price = 199.5)\r\n        int age = 21;\r\n    }\r\n}<\/code><\/pre>\n\n\n\n<p>\u7279\u6b8a\u5c5e\u6027<br>value\u5c5e\u6027\uff0c\u5982\u679c\u53ea\u6709\u4e00\u4e2avalue\u5c5e\u6027\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528value\u5c5e\u6027\u7684\u65f6\u5019\u53ef\u4ee5\u7701\u7565value\u540d\u79f0\u4e0d\u5199!!<br>\u4f46\u662f\u5982\u679c\u6709\u591a\u4e2a\u5c5e\u6027, \u4e14\u591a\u4e2a\u5c5e\u6027\u6ca1\u6709\u9ed8\u8ba4\u503c\uff0c\u90a3\u4e48value\u540d\u79f0\u662f\u4e0d\u80fd\u7701\u7565\u7684\u3002<\/p>\n\n\n\n<p>\u5143\u6ce8\u89e3<br>\u5143\u6ce8\u89e3\uff1a\u6ce8\u89e3\u6ce8\u89e3\u7684\u6ce8\u89e3\u3002<br>\u5143\u6ce8\u89e3\u6709\u4e24\u4e2a\uff1a<br>@Target: \u7ea6\u675f\u81ea\u5b9a\u4e49\u6ce8\u89e3\u53ea\u80fd\u5728\u54ea\u4e9b\u5730\u65b9\u4f7f\u7528\uff0c<br>@Retention\uff1a\u7533\u660e\u6ce8\u89e3\u7684\u751f\u547d\u5468\u671f<br>@Target\u4e2d\u53ef\u4f7f\u7528\u7684\u503c\u5b9a\u4e49\u5728ElementType\u679a\u4e3e\u7c7b\u4e2d\uff0c\u5e38\u7528\u503c\u5982\u4e0b<br>TYPE\uff0c\u7c7b\uff0c\u63a5\u53e3<br>FIELD, \u6210\u5458\u53d8\u91cf<br>METHOD, \u6210\u5458\u65b9\u6cd5<br>PARAMETER, \u65b9\u6cd5\u53c2\u6570<br>CONSTRUCTOR, \u6784\u9020\u5668<br>LOCAL_VARIABLE, \u5c40\u90e8\u53d8\u91cf<br>@Retention\u4e2d\u53ef\u4f7f\u7528\u7684\u503c\u5b9a\u4e49\u5728RetentionPolicy\u679a\u4e3e\u7c7b\u4e2d\uff0c\u5e38\u7528\u503c\u5982\u4e0b<br>SOURCE\uff1a \u6ce8\u89e3\u53ea\u4f5c\u7528\u5728\u6e90\u7801\u9636\u6bb5\uff0c\u751f\u6210\u7684\u5b57\u8282\u7801\u6587\u4ef6\u4e2d\u4e0d\u5b58\u5728<br>CLASS\uff1a \u6ce8\u89e3\u4f5c\u7528\u5728\u6e90\u7801\u9636\u6bb5\uff0c\u5b57\u8282\u7801\u6587\u4ef6\u9636\u6bb5\uff0c\u8fd0\u884c\u9636\u6bb5\u4e0d\u5b58\u5728\uff0c\u9ed8\u8ba4\u503c.<br>RUNTIME\uff1a\u6ce8\u89e3\u4f5c\u7528\u5728\u6e90\u7801\u9636\u6bb5\uff0c\u5b57\u8282\u7801\u6587\u4ef6\u9636\u6bb5\uff0c\u8fd0\u884c\u9636\u6bb5\uff08\u5f00\u53d1\u5e38\u7528\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u591a\u7ebf\u7a0b\uff08\u5f85\u7eed\uff09\uff0c\u5355\u5143\u6d4b\u8bd5\uff0c\u53cd\u5c04\uff0c\u6ce8\u91ca<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-664","post","type-post","status-publish","format-standard","hentry","category-java"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/posts\/664","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/comments?post=664"}],"version-history":[{"count":13,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/posts\/664\/revisions"}],"predecessor-version":[{"id":684,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/posts\/664\/revisions\/684"}],"wp:attachment":[{"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/media?parent=664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/categories?post=664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/tags?post=664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}