{"id":10006585,"date":"2022-09-23T19:02:13","date_gmt":"2022-09-23T11:02:13","guid":{"rendered":"https:\/\/ityet.com\/?p=10006585"},"modified":"2022-09-23T19:02:13","modified_gmt":"2022-09-23T11:02:13","slug":"java%e5%8f%8d%e5%b0%84%e7%9c%9f%e6%ad%a3%e7%9a%84%e8%af%a6%e8%a7%a3%ef%bc%8c%e5%ad%a6%e4%bb%a5%e8%87%b4%e7%94%a8%ef%bc%8c%e5%ae%9e%e6%88%98%e6%a1%88%e4%be%8b%ef%bc%8c%e8%99%bd%e4%b8%8d%e5%8f%8a","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006585","title":{"rendered":"Java\u53cd\u5c04\u771f\u6b63\u7684\u8be6\u89e3\uff0c\u5b66\u4ee5\u81f4\u7528\uff0c\u5b9e\u6218\u6848\u4f8b\uff0c\u867d\u4e0d\u53ca\u4e07\u5b57\uff0c\u4f46\u4e5f\u5df2\u6709\u8fd18000\u5b57"},"content":{"rendered":"<blockquote>\n<p>\u4f5c\u4e3aJava\u5f00\u53d1\u8005\uff0c\u4f60\u8ba4\u4e3a\u53cd\u5c04\u8fd9\u4e2a\u77e5\u8bc6\u70b9\u91cd\u8981\u7a0b\u5ea6\uff0c\u5728\u4f60\u5fc3\u91cc\u662f\u4ec0\u4e48\u6837\u7684\u5462\uff1f<\/p>\n<p>\u4ee5\u524d\u6211\u4e5f\u53ea\u89c9\u5f97\u53cd\u5c04\u975e\u5e38\u91cd\u8981\uff0c\u4f46\u603b\u5f52\u662f\u542c\u8fd9\u4e2a\u6587\u7ae0\u8bf4\uff0c\u542c\u90a3\u4e2a\u670b\u53cb\u8bf4\uff0c\u5b66\u662f\u5b66\u4e86\uff0c\u4f46\u5374\u6ca1\u600e\u4e48\u5e94\u7528\u3002<\/p>\n<p>\u5f53\u6211\u6b63\u5f0f\u8fdb\u5165\u5230\u793e\u4f1a\u5f53 cv \u4ed4\u7684\u65f6\u5019\uff0c\u9700\u8981\u8003\u8651\u7684\u95ee\u9898\u591a\u4e86\uff0c\u6162\u6162\u601d\u8003\u95ee\u9898\u4e86\uff0c\u5c31\u89c9\u5f97\u53cd\u5c04\u662f\u4e2a\u529b\u5927\u65e0\u7a77\u7684\u4e1c\u897f\uff0c\u66f4\u4f1a\u611f\u89c9\u53cd\u5c04\u662f\u4e2a\u65e0\u6240\u4e0d\u80fd\u7684\u4e1c\u897f\uff0c<strong>\u5982\u5404\u79cd\u5404\u6837\u7684\u6846\u67b6\u7684\u5e95\u5c42\uff0c\u5404\u79cd\u5404\u6837\u7684\u62e6\u622a\u5668\u7684\u5b9e\u73b0\uff0c\u53cd\u5c04\u90fd\u662f\u5176\u4e2d\u5c11\u4e0d\u4e86\u7684\u4e00\u90e8\u5206<\/strong>~<\/p>\n<p>\u5982\u679c\u5e73\u65f6\u7740\u91cd\u4e8e\u5f00\u53d1\u4e1a\u52a1\u7684\u8bdd\uff0c\u90a3\u4e48\u786e\u5b9e\u4f1a\u8f83\u5c11\u4f7f\u7528\u5230\u53cd\u5c04\u673a\u5236\uff0c\u4f46\u5e76\u975e\u662f\u8bf4\u53cd\u5c04\u5b83\u4e0d\u91cd\u8981\uff0c\u53cd\u5c04\u5b83\u53ef\u662f\u642d\u5efa\u811a\u624b\u67b6\u7684\u57fa\u7840\u7684\u57fa\u7840\u52d2~<\/p>\n<\/blockquote>\n<p>\u6587\u7ae0\u5927\u81f4\u601d\u8def\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2vD5\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u5168\u6587\u5171 7500 \u5b57\u5de6\u53f3\uff0c\u6848\u4f8b\u5747\u53ef\u8fd0\u884c\uff0c\u9605\u8bfb\u65f6\u95f4\u5927\u7ea6\u9700\u898120\u5206\u949f\u5de6\u53f3\uff0c\u5982\u6709\u95ee\u9898\uff0c\u8bf7\u7559\u8a00\u6216\u53d1\u9001\u90ae\u4ef6\uff08<a href=\"https:\/\/segmentfault.com\/cdn-cgi\/l\/email-protection#96f8ecf5c9e1effed6a7a0a5b8f5f9fb\">mailto:<span class=\"__cf_email__\" data-cfemail=\"5d33273e022a24351d6c6b6e733e3230\">[email&#160;protected]<\/span><\/a>\uff09\u3002<\/p>\n<p>\u7f16\u5199\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5373\u4f7f\u4e66\u5199\u5b8c\u5df2\u9605\u8bfb\u8fc7\uff0c\u4f46\u96be\u514d\u53ef\u80fd\u4f1a\u51fa\u73b0\u9057\u6f0f\uff0c\u5982\u6709\u53d1\u73b0\u95ee\u9898\u8bf7\u53ca\u65f6\u8054\u7cfb\u4fee\u6b63\uff0c\u975e\u5e38\u611f\u8c22\u4f60\u7684\u9605\u8bfb\uff0c\u5e0c\u671b\u6211\u4eec\u90fd\u80fd\u6210\u4e3a\u6280\u672f\u9053\u8def\u4e0a\u7684\u670b\u53cb\u3002<\/p>\n<h2>\u4e00\u3001\u53cd\u5c04\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>JAVA \u53cd\u5c04\u673a\u5236\u662f\u5728\u8fd0\u884c\u72b6\u6001\u4e2d\uff0c\u5bf9\u4e8e\u4efb\u610f\u4e00\u4e2a\u7c7b\uff0c\u90fd\u80fd\u591f\u77e5\u9053\u8fd9\u4e2a\u7c7b\u7684\u6240\u6709\u5c5e\u6027\u548c\u65b9\u6cd5\uff1b\u5bf9\u4e8e\u4efb\u610f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u90fd\u80fd\u591f\u8c03\u7528\u5b83\u7684\u4efb\u610f\u4e00\u4e2a\u65b9\u6cd5\u548c\u5c5e\u6027\uff1b\u8fd9\u79cd<strong>\u52a8\u6001\u83b7\u53d6\u7684\u4fe1\u606f\u4ee5\u53ca\u52a8\u6001\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\u7684\u529f\u80fd\u79f0\u4e3ajava\u8bed\u8a00\u7684\u53cd\u5c04\u673a\u5236<\/strong>\u3002<\/p>\n<p>\u4e0d\u8fc7\u8981\u60f3\u89e3\u5256\u4e00\u4e2a\u7c7b\uff0c\u5c31\u8981\u5148\u83b7\u53d6\u5230\u8be5\u7c7b\u7684\u5b57\u8282\u7801\u6587\u4ef6\u5bf9\u5e94\u7684Class\u7c7b\u578b\u7684\u5bf9\u8c61.<\/p>\n<p>\u7a0d\u540e\u5c31\u4f1a\u8bb2\u5230~<\/p>\n<p>&#8220;<strong>\u53cd\u5c04\u4e4b\u6240\u4ee5\u88ab\u79f0\u4e3a\u6846\u67b6\u7684\u7075\u9b42<\/strong>&#8220;\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5b83\u8d4b\u4e88\u4e86\u6211\u4eec\u5728\u8fd0\u884c\u65f6\u5206\u6790\u7c7b\u4ee5\u53ca\u6267\u884c\u7c7b\u4e2d\u65b9\u6cd5\u7684\u80fd\u529b\uff0c\u8fd9\u79cd\u80fd\u529b\u4e5f\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684\u52a8\u6001\u6027\uff0c\u5229\u7528\u8fd9\u79cd\u6027\u8d28\u53ef\u4ee5\u4f7f\u7f16\u5199\u7684\u7a0b\u5e8f\u66f4\u7075\u6d3b\u66f4\u901a\u7528\u3002<\/p>\n<p>\u53cd\u5c04\u673a\u5236\u53ef\u4ee5\u7528\u6765\uff1a<\/p>\n<ul>\n<li>\u5728\u8fd0\u884c\u65f6\u5206\u6790\u7c7b\u7684\u80fd\u529b\uff0c\u5982\u53ef\u4ee5\u6784\u9020\u4efb\u610f\u4e00\u4e2a\u7c7b\uff0c\u53ef\u4ee5\u83b7\u53d6\u4efb\u610f\u4e00\u4e2a\u7c7b\u7684\u5168\u90e8\u4fe1\u606f\uff0c<\/li>\n<li>\u5728\u8fd0\u884c\u65f6\u68c0\u67e5\u5bf9\u8c61\uff0c\u5982\u5728\u8fd0\u884c\u65f6\u5224\u65ad\u4efb\u610f\u4e00\u4e2a\u5bf9\u8c61\u6240\u5c5e\u7684\u7c7b<\/li>\n<li>\u5b9e\u73b0\u6cdb\u578b\u6570\u7ec4\u64cd\u4f5c\u4ee3\u7801\uff0c\u56e0\u4e3a\u5728\u8fd0\u884c\u65f6\u53ef\u4ee5\u83b7\u53d6\u6cdb\u578b\u4fe1\u606f<\/li>\n<li>\u5229\u7528Method\u5bf9\u8c61\uff0c\u5982\u6211\u4eec\u7ecf\u5e38\u4f7f\u7528\u7684\u52a8\u6001\u4ee3\u7406\uff0c\u5c31\u662f\u4f7f\u7528<code>Method.invoke()<\/code>\u6765\u5b9e\u73b0\u65b9\u6cd5\u7684\u8c03\u7528\u3002<\/li>\n<\/ul>\n<p>\u53cd\u5c04\u662f\u4e00\u79cd\u529f\u80fd\u5f3a\u5927\u4e14\u590d\u6742\u7684\u673a\u5236\uff0c\u5728\u5f00\u53d1Java\u5de5\u5177\u6216\u6846\u67b6\u65b9\u9762\uff0c\u53cd\u5c04\u66f4\u662f\u4e0d\u53ef\u7f3a\u5c11\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<h2>\u4e8c\u3001Class \u5bf9\u8c61\u8be6\u89e3<\/h2>\n<p>\u4e4b\u524d\u8bf4\u5230\u4e86\uff0c\u5982\u679c\u8981\u5206\u6790\u4e00\u4e2a\u7c7b\uff0c\u5c31\u5fc5\u987b\u8981\u83b7\u53d6\u5230\u8be5\u7c7b\u7684\u5b57\u8282\u7801\u6587\u4ef6\u5bf9\u5e94 Class \u7c7b\u578b\u5bf9\u8c61\u3002<\/p>\n<p>\u53e6\u5916\u5982\u679c\u6709\u542c\u5230<code>\u7c7b\u6a21\u677f\u5bf9\u8c61<\/code>\uff0c\u8fd9\u4e2a\u8bf4\u7684\u5176\u5b9e\u5c31\u662f<code>Class\u5bf9\u8c61<\/code>\uff0c\u5927\u5bb6\u4e0d\u8981\u8bef\u4f1a\u4e86\u3002<\/p>\n<h3>2.1\u3001\u5982\u4f55\u83b7\u53d6\u5230Class\u5bf9\u8c61\u5462\uff1f<\/h3>\n<p>\u5f97\u5230Class\u7684\u65b9\u5f0f\u603b\u5171\u6709\u56db\u79cd\uff1a<\/p>\n<ul>\n<li>\u901a\u8fc7\u5bf9\u8c61\u8c03\u7528 <code>getClass()<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6<\/li>\n<li>\u76f4\u63a5\u901a\u8fc7<code>\u7c7b\u540d.class<\/code> \u7684\u65b9\u5f0f\u5f97\u5230<\/li>\n<li>\u901a\u8fc7 <code>Class<\/code>\u5bf9\u8c61\u7684 <code>forName()<\/code> \u9759\u6001\u65b9\u6cd5\u6765\u83b7\u53d6<\/li>\n<li><code>Classloader<\/code>\uff0c\u901a\u8fc7\u7c7b\u52a0\u8f7d\u5668\u8fdb\u884c\u83b7\u53d6<\/li>\n<\/ul>\n<pre><code>\u00a0\/**\n\u00a0 * @description:\n\u00a0 * @author: Ning Zaichun\n\u00a0 * @date: 2022\u5e7409\u670815\u65e5 22:49\n\u00a0 *\/\n\u00a0public class ClassDemo01 {\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0@Test\n\u00a0 \u00a0 \u00a0public void test1() throws Exception {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/1\u3001\u901a\u8fc7\u5bf9\u8c61\u8c03\u7528 getClass() \u65b9\u6cd5\u6765\u83b7\u53d6\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/  \u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u800c\u6211\u4e0d\u77e5\u9053\u4f60\u5177\u4f53\u662f\u4ec0\u4e48\u7c7b\uff0c\u7528\u8fd9\u79cd\u65b9\u6cd5\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Student student = new Student();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Class studentClass1 = student.getClass();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(studentClass1);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ out: class com.nzc.Student\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/2\u3001\u76f4\u63a5\u901a\u8fc7`\u7c7b\u540d.class` \u7684\u65b9\u5f0f\u5f97\u5230\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u4efb\u4f55\u4e00\u4e2a\u7c7b\u90fd\u6709\u4e00\u4e2a\u9690\u542b\u7684\u9759\u6001\u6210\u5458\u53d8\u91cf class\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ Class studentClass2 = Student.class;\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Class&lt;?&gt; studentClass2 = Student.class;\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(studentClass2);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ out: class com.nzc.Student\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;studentClass1\u548cstudentClass2 \u662f\u5426\u76f8\u7b49==&gt;&quot; + (studentClass1 == studentClass2));\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ studentClass1\u548cstudentClass2 \u662f\u5426\u76f8\u7b49==&gt;true\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/3\u3001\u901a\u8fc7 Class \u5bf9\u8c61\u7684 forName() \u9759\u6001\u65b9\u6cd5\u6765\u83b7\u53d6\uff0c\u4f7f\u7528\u7684\u6700\u591a\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u00a0 \u4f46\u9700\u8981\u629b\u51fa\u6216\u6355\u83b7 ClassNotFoundException \u5f02\u5e38\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Class&lt;?&gt; studentClass3 = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(studentClass3);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ out: class com.nzc.Student\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;studentClass1\u548cstudentClass3 \u662f\u5426\u76f8\u7b49==&gt;&quot; + (studentClass1 == studentClass3));\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/studentClass1\u548cstudentClass3 \u662f\u5426\u76f8\u7b49==&gt;true\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/4\u3001 \u4f7f\u7528\u7c7b\u7684\u52a0\u8f7d\u5668\uff1aClassLoader \u6765\u83b7\u53d6Class\u5bf9\u8c61\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0ClassLoader classLoader = ClassDemo01.class.getClassLoader();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Class studentClass4 = classLoader.loadClass(&quot;com.nzc.Student&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(studentClass4);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;studentClass1\u548cstudentClass4 \u662f\u5426\u76f8\u7b49==&gt;&quot; + (studentClass1 == studentClass4));\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/studentClass1\u548cstudentClass4 \u662f\u5426\u76f8\u7b49==&gt;true\n\u00a0 \u00a0  }\n\u00a0}<\/code><\/pre>\n<p>\u5728\u8fd9\u56db\u79cd\u65b9\u5f0f\u4e2d\uff0c\u6700\u5e38\u4f7f\u7528\u7684\u662f\u7b2c\u4e09\u79cd\u65b9\u5f0f\uff0c\u7b2c\u4e00\u79cd\u90fd\u76f4\u63a5new\u5bf9\u8c61\u5566\uff0c\u5b8c\u5168\u6ca1\u6709\u5fc5\u8981\u518d\u4f7f\u7528\u53cd\u5c04\u4e86\uff1b\u7b2c\u4e8c\u79cd\u65b9\u5f0f\u4e5f\u5df2\u7ecf\u660e\u786e\u4e86\u7c7b\u7684\u540d\u79f0\uff0c\u76f8\u5f53\u4e8e\u5df2\u7ecf\u56fa\u5b9a\u4e0b\u6765\uff0c\u5931\u53bb\u4e86\u4e00\u79cd\u52a8\u6001\u9009\u62e9\u52a0\u8f7d\u7c7b\u7684\u6548\u679c\uff1b\u800c\u7b2c\u4e09\u79cd\u65b9\u5f0f\uff0c\u53ea\u8981\u4f20\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u8fd9\u4e2a\u5b57\u7b26\u4e32\u53ef\u4ee5\u662f\u81ea\u5df1\u4f20\u5165\u7684\uff0c\u4e5f\u53ef\u4ee5\u662f\u5199\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u7684\u3002<\/p>\n<p>\u50cf\u5728\u5b66 JDBC \u8fde\u63a5\u7684\u65f6\u5019\uff0c\u5927\u5bb6\u80af\u5b9a\u90fd\u4f7f\u7528\u8fc7 <code>Class<\/code>\u5bf9\u8c61\u7684 <code>forName()<\/code> \u9759\u6001\u65b9\u6cd5\u6765\u83b7\u53d6Class\u5bf9\u8c61\uff0c\u518d\u52a0\u8f7d\u6570\u636e\u5e93\u8fde\u63a5\u5bf9\u8c61\uff0c\u4f46\u53ef\u80fd\u90a3\u65f6\u5019\u53ea\u662f\u5306\u5306\u800c\u8fc7\u7f62\u4e86\u3002<\/p>\n<p><strong>\u6ce8\u610f<\/strong>\uff1a\u4e0d\u77e5\u9053\u5927\u5bb6\u6709\u6ca1\u6709\u89c2\u5bdf\uff0c\u6211\u628a\u5404\u79cd\u65b9\u5f0f\u6240\u83b7\u53d6\u5230\u7684<code>class<\/code>\u5bf9\u8c61\uff0c\u90fd\u8fdb\u884c\u4e86\u4e00\u756a\u6bd4\u8f83\uff0c\u5e76\u4e14\u7ed3\u679c\u90fd\u4e3a<code>true<\/code>\uff0c\u8fd9\u662f\u56e0\u4e3a<strong>\u4e00\u4e2a\u7c7b\u5728 JVM \u4e2d\u53ea\u4f1a\u6709\u4e00\u4e2a Class \u5b9e\u4f8b<\/strong>\uff0c\u4e3a\u4e86\u89e3\u91ca\u6b64\u70b9\uff0c\u6211\u628a\u7c7b\u52a0\u8f7d\u8fc7\u7a0b\u4e5f\u7b80\u5355\u7684\u505a\u4e86\u4e00\u4e2a\u9648\u8ff0\u3002<\/p>\n<h3>2.2\u3001\u7c7b\u7684\u52a0\u8f7d\u8fc7\u7a0b<\/h3>\n<p>\u5f53\u6211\u4eec\u9700\u8981\u4f7f\u7528\u67d0\u4e2a\u7c7b\u65f6\uff0c\u5982\u679c\u8be5\u7c7b\u8fd8\u672a\u88ab\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u5219\u4f1a\u7ecf\u5386\u4e0b\u9762\u7684\u8fc7\u7a0b\u5bf9\u7c7b\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2vEb\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u5373\u7c7b\u7684\u52a0\u8f7d &#8212;&gt; \u94fe\u63a5 &#8212;&gt; \u521d\u59cb\u5316\u4e09\u4e2a\u9636\u6bb5\u3002<\/p>\n<p>\u5728\u8fd9\u91cc\u6211\u53ea\u7740\u773c\u4e8e\u7c7b\u7684\u52a0\u8f7d\u8fc7\u7a0b\u4e86\uff0c\u60f3\u8981\u4e86\u89e3\u66f4\u4e3a\u8be6\u7ec6\u7684\uff0c\u5c31\u9700\u8981\u5927\u5bb6\u53bb\u627e\u627e\u8d44\u6599\u770b\u770b\u5566~<\/p>\n<p><strong>\u52a0\u8f7d\u8fc7\u7a0b<\/strong>\uff1a<\/p>\n<p>1\u3001\u5728\u6211\u4eec\u8fdb\u884c\u7f16\u8bd1\u540e\uff08javac.exe\u547d\u4ee4\uff09\uff0c\u4f1a\u751f\u6210\u4e00\u4e2a\u6216\u591a\u4e2a\u5b57\u8282\u7801\u6587\u4ef6\uff08\u5c31\u662f\u9879\u76ee\u4e2d\u7f16\u8bd1\u5b8c\u4f1a\u51fa\u73b0\u7684 target \u76ee\u5f55\u4e0b\u7684\u4ee5.class\u7ed3\u5c3e\u7684\u6587\u4ef6\uff09<\/p>\n<p>2\u3001\u63a5\u7740\u5f53\u6211\u4eec\u4f7f\u7528 java.exe \u547d\u4ee4\u5bf9\u67d0\u4e2a\u5b57\u8282\u7801\u6587\u4ef6\u8fdb\u884c\u89e3\u91ca\u8fd0\u884c\u65f6\u3002<\/p>\n<p>3\u3001\u52a0\u8f7d\u8fc7\u7a0b<\/p>\n<ul>\n<li>\u5c31\u76f8\u5f53\u4e8e\u5c06 class \u6587\u4ef6\u5b57\u8282\u7801\u5185\u5bb9\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u5e76\u5c06\u8fd9\u4e9b\u9759\u6001\u6570\u636e\u8f6c\u6362\u6210\u65b9\u6cd5\u533a\u7684\u8fd0\u884c\u65f6\u6570\u636e\u7ed3\u6784\uff1b<\/li>\n<li>\u5e76\u751f\u6210\u4e00\u4e2a\u4ee3\u8868\u8fd9\u4e2a\u7c7b\u7684 <code>java.lang.Class<\/code> \u5bf9\u8c61\uff0c\u8fd9\u4e2a\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u7684\u7c7b\uff0c\u6211\u4eec\u79f0\u4e3a\u8fd0\u884c\u65f6\u7c7b\uff0c\u6b64\u8fd0\u884c\u65f6\u7c7b\uff0c\u5c31\u662f <code>Class<\/code>\u7684\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u6240\u6709\u9700\u8981\u8bbf\u95ee\u548c\u4f7f\u7528\u7c7b\u6570\u636e\u53ea\u80fd\u901a\u8fc7\u8fd9\u4e2a <code>Class<\/code> \u5bf9\u8c61\u3002<\/li>\n<li>\u6240\u8c13<code>Class<\/code>\u5bf9\u8c61\uff0c\u4e5f\u79f0\u4e3a<strong>\u7c7b\u6a21\u677f\u5bf9\u8c61<\/strong>\uff0c\u5176\u5b9e\u5c31\u662f Java \u7c7b\u5728 JVM \u5185\u5b58\u4e2d\u7684\u4e00\u4e2a\u5feb\u7167\uff0cJVM \u5c06\u4ece\u5b57\u8282\u7801\u6587\u4ef6\u4e2d\u89e3\u6790\u51fa\u7684\u5e38\u91cf\u6c60\u3001 \u7c7b\u5b57\u6bb5\u3001\u7c7b\u65b9\u6cd5\u7b49\u4fe1\u606f\u5b58\u50a8\u5230\u6a21\u677f\u4e2d\uff0c\u8fd9\u6837 JVM \u5728\u8fd0\u884c\u671f\u4fbf\u80fd\u901a\u8fc7\u7c7b\u6a21\u677f\u800c\u83b7 \u53d6 Java \u7c7b\u4e2d\u7684\u4efb\u610f\u4fe1\u606f\uff0c\u80fd\u591f\u5bf9 Java \u7c7b\u7684\u6210\u5458\u53d8\u91cf\u8fdb\u884c\u904d\u5386\uff0c\u4e5f\u80fd\u8fdb\u884c Java \u65b9\u6cd5\u7684\u8c03\u7528\u3002<\/li>\n<li>\u53cd\u5c04\u7684\u673a\u5236\u5373\u57fa\u4e8e\u8fd9\u4e00\u57fa\u7840\u3002\u5982\u679c JVM \u6ca1\u6709\u5c06 Java \u7c7b\u7684\u58f0\u660e\u4fe1\u606f\u5b58\u50a8\u8d77\u6765\uff0c\u5219 JVM \u5728\u8fd0\u884c\u671f\u4e5f\u65e0\u6cd5\u8fdb\u884c\u53cd\u5c04\u3002<\/li>\n<\/ul>\n<p>4\u3001\u8fd9\u4e2a\u52a0\u8f7d\u7684\u8fc7\u7a0b\u8fd8\u9700\u8981\u7c7b\u52a0\u8f7d\u5668\u53c2\u4e0e\uff0c\u5173\u4e8e\u7c7b\u52a0\u8f7d\u5668\u7684\u7c7b\u578b\u5927\u5bb6\u53ef\u4ee5\u53bb\u4e86\u89e3\u4e86\u89e3\uff0c\u8fd8\u6709\u53cc\u4eb2\u59d4\u6d3e\u673a\u5236\u7b49\uff0c\u6b64\u5904\u6211\u4fbf\u4e0d\u518d\u591a\u8a00<\/p>\n<h3>2.3\u3001\u4e3a\u4e86\u66f4\u4fbf\u4e8e\u8bb0\u5fc6\u7684\u56fe<\/h3>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2vEc\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\uff08\u56fe\u7247\u8bf4\u660e\uff1a\u4e3a\u66f4\u597d\u7684\u63cf\u8ff0JVM\u4e2d\u53ea\u6709\u4e00\u4e2aClass\u5bf9\u8c61\uff0c\u800c\u753b\u4e0b\u6b64\u56fe\uff0c\u5e0c\u671b\u901a\u8fc7\u8fd9\u5f20\u7b80\u56fe\uff0c\u8ba9\u4f60\u8bb0\u5fc6\u66f4\u4e3a\u6df1\u523b\uff09<\/p>\n<h4>2.4\u3001Class \u5e38\u7528\u7684API<\/h4>\n<p><strong>\u901a\u8fc7 Class \u7c7b\u83b7\u53d6\u6210\u5458\u53d8\u91cf\u3001\u6210\u5458\u65b9\u6cd5\u3001\u63a5\u53e3\u3001\u8d85\u7c7b\u3001\u6784\u9020\u65b9\u6cd5\u7b49<\/strong><\/p>\n<ul>\n<li><code>getName()<\/code>\uff1a\u83b7\u5f97\u7c7b\u7684\u5b8c\u6574\u540d\u5b57\u3002<\/li>\n<li><code>getFields()<\/code>\uff1a\u83b7\u5f97\u7c7b\u7684<code>public<\/code>\u7c7b\u578b\u7684\u5c5e\u6027\u3002<\/li>\n<li><code>getDeclaredFields()<\/code>\uff1a\u83b7\u5f97\u7c7b\u7684\u6240\u6709\u5c5e\u6027\u3002\u5305\u62ec<code>private<\/code>\u58f0\u660e\u7684\u548c\u7ee7\u627f\u7c7b<\/li>\n<li><code>getMethods()<\/code>\uff1a\u83b7\u5f97\u7c7b\u7684<code>public<\/code>\u7c7b\u578b\u7684\u65b9\u6cd5\u3002<\/li>\n<li><code>getDeclaredMethods()<\/code>\uff1a\u83b7\u5f97\u7c7b\u7684\u6240\u6709\u65b9\u6cd5\u3002\u5305\u62ec<code>private<\/code>\u58f0\u660e\u7684\u548c\u7ee7\u627f\u7c7b<\/li>\n<li><code>getMethod(String name, Class[] parameterTypes)<\/code>\uff1a\u83b7\u5f97\u7c7b\u7684\u7279\u5b9a\u65b9\u6cd5\uff0c<code>name<\/code>\u53c2\u6570\u6307\u5b9a\u65b9\u6cd5\u7684\u540d\u5b57\uff0c<code>parameterTypes<\/code> \u53c2\u6570\u6307\u5b9a\u65b9\u6cd5\u7684\u53c2\u6570\u7c7b\u578b\u3002<\/li>\n<li><code>getConstructors()<\/code>\uff1a\u83b7\u5f97\u7c7b\u7684<code>public<\/code>\u7c7b\u578b\u7684\u6784\u9020\u65b9\u6cd5\u3002<\/li>\n<li><code>getConstructor(Class[] parameterTypes)<\/code>\uff1a\u83b7\u5f97\u7c7b\u7684\u7279\u5b9a\u6784\u9020\u65b9\u6cd5\uff0c<code>parameterTypes<\/code>\u53c2\u6570\u6307\u5b9a\u6784\u9020\u65b9\u6cd5\u7684\u53c2\u6570\u7c7b\u578b\u3002<\/li>\n<li><code>newInstance()<\/code>\uff1a\u901a\u8fc7\u7c7b\u7684\u4e0d\u5e26\u53c2\u6570\u7684\u6784\u9020\u65b9\u6cd5\u521b\u5efa\u8fd9\u4e2a\u7c7b\u7684\u4e00\u4e2a\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<p>\u53e6\u5916\u5c31\u8fd8\u6709\u53cd\u5c04\u5305\u4e0b\u7684\u51e0\u4e2a\u5e38\u7528\u7684\u5bf9\u8c61<code>Constructor\u3001Filed\u3001Method<\/code>\u7b49\uff0c\u5206\u522b\u8868\u793a\u7c7b\u7684\u6784\u9020\u5668\u3001\u5b57\u6bb5\u5c5e\u6027\u3001\u65b9\u6cd5\u7b49\u7b49<\/p>\n<p>\u8fd9\u4e9b\u90fd\u4f1a\u5728\u4e0b\u6587\u6162\u6162\u9648\u8ff0\u51fa\u6765~<\/p>\n<h2>\u4e09\u3001\u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u5b8c\u6574\u4fe1\u606f\u5e76\u4f7f\u7528<\/h2>\n<p>\u6240\u8c13<strong>\u8fd0\u884c\u65f6\u7c7b<\/strong>\uff0c\u5c31\u662f\u7a0b\u5e8f\u8fd0\u884c\u65f6\u6240\u521b\u5efa\u51fa\u6765\u7684\u7c7b\uff0c\u4f60\u76f4\u63a5\u7406\u89e3\u4e3a\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u5230\u7684\u7c7b\u4e5f\u53ef\u3002\u5927\u4f53\u610f\u601d\u662f\u5982\u6b64\u3002<\/p>\n<p>\u5728\u8bb2\u8ff0\u8fd9\u4e00\u5c0f\u8282\u65f6\uff0c\u5148\u8981\u7406\u89e3<strong>Java\u4e2d\u4e00\u5207\u7686\u5bf9\u8c61<\/strong>\u8fd9\u53e5\u8bdd\u3002<\/p>\n<p>\u6211\u4eec\u5e73\u5e38\u7f16\u5199\u4e00\u4e2a\u7c7b\uff0c\u6211\u4eec\u4f1a\u5c06\u5b83\u79f0\u4e3a\u4e00\u4e2aJava\u5bf9\u8c61\uff0c\u4f46\u662f\u5728\u53cd\u5c04\u8fd9\u91cc\u5c06\u6b64\u6982\u5ff5\u518d\u6b21\u5411\u4e0a\u62bd\u8c61\u4e86\u3002<\/p>\n<p>\u7c7b\u7684\u57fa\u672c\u4fe1\u606f\uff1a\u6784\u9020\u65b9\u6cd5\u3001\u6210\u5458\u53d8\u91cf\uff0c\u65b9\u6cd5\uff0c\u7c7b\u4e0a\u7684\u6ce8\u89e3\uff0c\u65b9\u6cd5\u6ce8\u89e3\uff0c\u6210\u5458\u53d8\u91cf\u6ce8\u89e3\u7b49\u7b49\uff0c\u8fd9\u4e9b\u90fd\u662fJava\u5bf9\u8c61\uff0c\u4e5f\u662f\u8bc1\u660e\u4e86<code>Java\u4e2d\u4e00\u5207\u7686\u5bf9\u8c61<\/code>\u8fd9\u53e5\u8bdd\u3002<\/p>\n<p>\u5176\u4e2d<code>Constructor<\/code>\u5c31\u8868\u793a\u6784\u9020\u65b9\u6cd5\u7684\u5bf9\u8c61\uff0c\u4ed6\u5305\u542b\u4e86\u6784\u9020\u65b9\u6cd5\u7684\u4e00\u5207\u4fe1\u606f\uff0c<\/p>\n<p><code>Field\u3001Method<\/code>\u7b49\u7b49\u90fd\u662f\u5982\u6b64\u3002<\/p>\n<p>\u4e0d\u8981\u592a\u8fc7\u4e8e\u9ebb\u70e6\u548c\u91cd\u590d\u4e66\u5199\uff0c\u6211\u5c06\u6848\u4f8b\u4e2d\u64cd\u4f5c\u7684\u6240\u6709\u76f8\u5173\u4ee3\u7801\uff0c\u90fd\u653e\u5728\u6b64\u5904\u4e86\uff0c\u6848\u4f8b\u4e2d\u7684\u4f9d\u8d56\u5168\u90e8\u57fa\u4e8e\u6b64\u3002<\/p>\n<pre><code>\u00a0public interface TestService {\n\u00a0}<\/code><\/pre>\n<pre><code>\u00a0@Target({ElementType.TYPE,ElementType.PARAMETER, ElementType.METHOD, ElementType.FIELD})\n\u00a0@Retention(RetentionPolicy.RUNTIME)\n\u00a0@Documented\n\u00a0public @interface MarkAnnotation {\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0String value() default &quot;&quot;;\n\u00a0\u200b\n\u00a0}<\/code><\/pre>\n<pre><code>\u00a0public class Generic&lt;T&gt; {\n\u00a0}\n\u00a0\u200b<\/code><\/pre>\n<pre><code>\u00a0public interface GenericInterface&lt;T&gt; {\n\u00a0}\n\u00a0\u200b<\/code><\/pre>\n<pre><code>\u00a0\/\/ TYPE \u8868\u793a\u53ef\u4ee5\u6807\u8bb0\u5728\u7c7b\u4e0a\n\u00a0\/\/  PARAMETER \u8868\u793a\u53ef\u4ee5\u6807\u8bb0\u5728\u65b9\u6cd5\u5f62\u5f0f\u53c2\u6570\n\u00a0\/\/  METHOD \u65b9\u6cd5\n\u00a0\/\/  FIELD \u6210\u5458\u5c5e\u6027\u4e0a\n\u00a0@Target({ElementType.TYPE,ElementType.METHOD, ElementType.FIELD,ElementType.PARAMETER})\n\u00a0@Retention(RetentionPolicy.RUNTIME) \/\/ \u8fd9\u91cc\u8868\u660e\u662f\u8fd0\u884c\u65f6\u6ce8\u89e3\n\u00a0@Documented\n\u00a0public @interface LikeAnnotation {\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0String value() default &quot;&quot;;\n\u00a0\u200b\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0String[] params() default {};\n\u00a0}<\/code><\/pre>\n<pre><code>\u00a0@Data\n\u00a0@MarkAnnotation\n\u00a0public class Person implements TestService{\n\u00a0 \u00a0 \u00a0private String sex;\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0public Integer age;\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0private void mySex(String sex){\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;\u6211\u7684\u6027\u522b&quot;+sex);\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0public void myAge(Integer age){\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;\u6211\u7684\u5e74\u9f84&quot;+age);\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0\u200b\n\u00a0}<\/code><\/pre>\n<pre><code>\u00a0@ToString(callSuper = true) \/\/ \u589e\u52a0\u8fd9\u884c\u662f\u4e3a\u4e86\u6253\u5370\u65f6\u5c06\u7236\u7c7b\u5c5e\u6027\u4e5f\u6253\u5370\u51fa\u6765\uff0c\u65b9\u4fbf\u67e5\u770b~\n\u00a0@Data\n\u00a0@LikeAnnotation(value = &quot;123&quot;)\n\u00a0public class Student extends Person implements Serializable {\n\u00a0 \u00a0 \u00a0@LikeAnnotation\n\u00a0 \u00a0 \u00a0private String username;\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0@LikeAnnotation\n\u00a0 \u00a0 \u00a0public String school;\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0private Double score;\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0public Student() {\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0private Student(String username) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0this.username = username;\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0public Student(String username, String school) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0this.username = username;\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0this.school = school;\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0@LikeAnnotation\n\u00a0 \u00a0 \u00a0public void hello() {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;\u4e16\u754c\uff0c\u4f60\u597d&quot;);\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0public void say( String username) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;\u4f60\u597d\uff0c\u6211\u53eb&quot; + username);\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0private void myScore(Double score) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;\u6211\u7684\u5206\u6570\u662f\u4e00\u4e2a\u79c1\u5bc6\u4e1c\u897f\uff0c&quot; + score);\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0public void annotationTest(@LikeAnnotation \u00a0String username,@MarkAnnotation String str){\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println( &quot;\u6d4b\u8bd5\u83b7\u53d6\u65b9\u6cd5\u53c2\u6570\u4e2d\u7684\u6ce8\u89e3\u4fe1\u606f&quot;);\n\u00a0 \u00a0  }\n\u00a0}<\/code><\/pre>\n<h3>3.1\u3001\u53cd\u5c04\u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u6784\u9020\u65b9\u6cd5\u5e76\u4f7f\u7528<\/h3>\n<p>class\u83b7\u53d6\u6784\u9020\u65b9\u6cd5\u7684\u76f8\u5173<code>API<\/code><\/p>\n<pre><code>\u00a0\/\/ \u83b7\u53d6\u6240\u6709\u7684\u6784\u9020\u51fd\u6570\n\u00a0Constructor&lt;?&gt;[] getConstructors()\n\u00a0\u200b\n\u00a0\/\/ \u83b7\u53d6 public\u6216 private \u4fee\u9970\u7684\u72d7\u8d5e\u51fd\u6570\uff0c\u53ea\u8981\u53c2\u6570\u5339\u914d\u5373\u53ef\n\u00a0Constructor&lt;?&gt;[] getDeclaredConstructors()\n\u00a0\u200b\n\u00a0\/\/ \u83b7\u53d6\u6240\u6709 public \u4fee\u9970\u7684 \u6784\u9020\u51fd\u6570\n\u00a0Constructor&lt;T&gt; getConstructor(Class&lt;?&gt;... parameterTypes)\n\u00a0 \u00a0 \u00a0\n\u00a0\/\/\u8c03\u7528\u6b64\u65b9\u6cd5\uff0c\u521b\u5efa\u5bf9\u5e94\u7684\u8fd0\u884c\u65f6\u7c7b\u7684\u5bf9\u8c61\u3002\n\u00a0public T newInstance(Object ... initargs)<\/code><\/pre>\n<p><code>newInstance()<\/code>\uff1a\u8c03\u7528\u6b64\u65b9\u6cd5\uff0c\u521b\u5efa\u5bf9\u5e94\u7684\u8fd0\u884c\u65f6\u7c7b\u7684\u5bf9\u8c61\u3002\u5185\u90e8\u8c03\u7528\u4e86\u8fd0\u884c\u65f6\u7c7b\u7684\u7a7a\u53c2\u7684\u6784\u9020\u5668\u3002<\/p>\n<p>\u8981\u60f3\u6b64\u65b9\u6cd5\u6b63\u5e38\u7684\u521b\u5efa\u8fd0\u884c\u65f6\u7c7b\u7684\u5bf9\u8c61\uff0c\u8981\u6c42\uff1a<\/p>\n<ul>\n<li>\u8fd0\u884c\u65f6\u7c7b\u5fc5\u987b\u63d0\u4f9b\u7a7a\u53c2\u7684\u6784\u9020\u5668\uff1b<\/li>\n<li>\u7a7a\u53c2\u7684\u6784\u9020\u5668\u7684\u8bbf\u95ee\u6743\u9650\u5f97\u591f\u3002\u901a\u5e38\uff0c\u8bbe\u7f6e\u4e3a public\u3002<\/li>\n<\/ul>\n<p>\u4e3a\u4ec0\u4e48\u8981 javabean \u4e2d\u8981\u6c42\u63d0\u4f9b\u4e00\u4e2a public \u7684\u7a7a\u53c2\u6784\u9020\u5668\uff1f<\/p>\n<p>\u539f\u56e0\uff1a 1\u3001\u4fbf\u4e8e\u901a\u8fc7\u53cd\u5c04\uff0c\u521b\u5efa\u8fd0\u884c\u65f6\u7c7b\u7684\u5bf9\u8c61\uff1b2\u3001\u4fbf\u4e8e\u5b50\u7c7b\u7ee7\u627f\u6b64\u8fd0\u884c\u65f6\u7c7b\u65f6\uff0c\u9ed8\u8ba4\u8c03\u7528 super() \u65f6\uff0c\u4fdd\u8bc1\u7236\u7c7b\u6709\u6b64\u6784 \u9020\u5668\u3002<\/p>\n<p>\u60f3\u8981\u66f4\u8be6\u7ec6\u7684\u4e86\u89e3\uff0c\u5efa\u8bae\u53bb\u770b\u751f\u6210\u7684\u5b57\u8282\u7801\u6587\u4ef6\uff0c\u5728\u90a3\u91cc\u80fd\u591f\u7ed9\u51fa\u4f60\u7b54\u6848\u3002<\/p>\n<p><strong>\u6d4b\u8bd5<\/strong>\uff1a<\/p>\n<pre><code>\u00a0\/**\n\u00a0 * @description:\n\u00a0 * @author: Ning Zaichun\n\u00a0 * @date: 2022\u5e7409\u670817\u65e5 1:17\n\u00a0 *\/\n\u00a0public class ConstructorTest {\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0\/**\n\u00a0 \u00a0 \u00a0 * \u83b7\u53d6\u516c\u6709\u3001\u79c1\u6709\u7684\u6784\u9020\u65b9\u6cd5 \u5e76\u8c03\u7528\u521b\u5efa\u5bf9\u8c61\n\u00a0 \u00a0 \u00a0 *\/\n\u00a0 \u00a0 \u00a0@Test\n\u00a0 \u00a0 \u00a0public void test1() throws Exception {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Class&lt;?&gt; aClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;======\u83b7\u53d6\u5168\u90e8public \u4fee\u9970\u7684\u6784\u9020\u65b9\u6cd5=========&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Constructor&lt;?&gt;[] constructors = aClass.getConstructors();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0for (Constructor&lt;?&gt; constructor : constructors) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(constructor);\n\u00a0 \u00a0 \u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;======\u83b7\u53d6 public\u3001private \u4fee\u9970\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u53ea\u8981\u53c2\u6570\u5339\u914d\u5373\u53ef=========&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/**\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 * \u8fd9\u91cc\u7684\u53c2\u6570 Class&lt;?&gt;... parameterTypes \u586b\u5199\u7684\u662f\u53c2\u6570\u7684\u7c7b\u578b\uff0c\u800c\u5e76\u975e\u67d0\u4e2a\u51c6\u786e\u7684\u503c\u4fe1\u606f\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 *\/\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Constructor&lt;?&gt; constructor = aClass.getDeclaredConstructor(String.class);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(constructor);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u56e0\u4e3a\u6b64\u6784\u9020\u51fd\u6570\u662f private \u4fee\u9970\uff0c\u5982\u679c\u4e0d\u8bbe\u7f6e\u66b4\u529b\u53cd\u5c04\uff0c\u5219\u6ca1\u6709\u6743\u9650\u8bbf\u95ee\u3002\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u8fd9\u91ccsetAccessible(true) \u662f\u8bbe\u7f6e\u66b4\u529b\u53cd\u5c04\uff0c\u5982\u679c\u4e0d\u8bbe\u7f6e\uff0c\u5219\u4f1a\u62a5\u9519\uff0c\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0constructor.setAccessible(true);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u8fd9\u91cc\u8c03\u7528\u7684\u6709\u53c2\u6784\u9020\uff0c\u6240\u4ee5\u5728\u8c03\u7528 newInstance \u65b9\u6cd5\u65f6\uff0c\u4e5f\u9700\u8981\u586b\u5199\u53c2\u6570\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Object o1 = constructor.newInstance(&quot;\u5b81\u5728\u6625&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0constructor.setAccessible(false);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;o1===&gt;&quot;+o1);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/**\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 * \u5982\u679c\u9700\u8981\u83b7\u53d6\u6709\u53c2\u6784\u9020\uff0c\u53ea\u9700\u8981\u586b\u5199\u5bf9\u5e94\u7684\u53c2\u6570\u7c7b\u578b\u5373\u53ef\uff0c\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 * \u83b7\u53d6\u65e0\u53c2\u6784\u9020\uff0c\u586bnull\u6216\u4e0d\u586b\u90fd\u53ef\u3002\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 *\/\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Constructor&lt;?&gt; constructor1 = aClass.getConstructor();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Constructor&lt;?&gt; constructor2 = aClass.getConstructor(String.class,String.class);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;\u65e0\u53c2\u6784\u9020==&gt;&quot;+constructor1);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;\u6709\u53c2\u6784\u9020==&gt;&quot;+constructor2);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Object o2 = constructor1.newInstance();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Object o3 = constructor2.newInstance(&quot;\u5b81\u5728\u66252&quot;,&quot;xxxx\u793e\u4f1a&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;o2===&gt;&quot;+o2);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;o3===&gt;&quot;+o3);\n\u00a0 \u00a0  }\n\u00a0}<\/code><\/pre>\n<p>\u65e2\u7136\u80fd\u591f\u83b7\u53d6\u5230\u6784\u9020\u65b9\u6cd5\uff0c\u90a3\u4e48\u4e5f\u5c31\u662f\u53ef\u4ee5\u4f7f\u7528\u7684\uff0c\u7528<code>Constructor.newInstance()<\/code>\u65b9\u6cd5\u6765\u8c03\u7528\u6784\u9020\u65b9\u6cd5\u5373\u53ef\uff0c\u5728\u4e0b\u5217\u7684\u6253\u5370\u4fe1\u606f\u4e2d\uff0c\u4e5f\u53ef\u4ee5\u770b\u51fa\u6765\u786e\u5b9e\u5982\u6b64\uff0c\u5982\u679c\u660e\u786e\u8981\u83b7\u53d6\u4e3a<code>Student<\/code>\u5bf9\u8c61\u7684\u8bdd\uff0c\u8fdb\u884c\u5f3a\u8f6c\u5373\u53ef\u3002<\/p>\n<pre><code>\u00a0======\u83b7\u53d6\u5168\u90e8public \u4fee\u9970\u7684\u6784\u9020\u65b9\u6cd5=========\n\u00a0public com.nzc.Student(java.lang.String,java.lang.String)\n\u00a0public com.nzc.Student()\n\u00a0======\u83b7\u53d6 public\u3001private \u4fee\u9970\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u53ea\u8981\u53c2\u6570\u5339\u914d\u5373\u53ef=========\n\u00a0private com.nzc.Student(java.lang.String)\n\u00a0o1===&gt;Student(username=\u5b81\u5728\u6625, school=null, age=null)\n\u00a0\u65e0\u53c2\u6784\u9020==&gt;public com.nzc.Student()\n\u00a0\u6709\u53c2\u6784\u9020==&gt;public com.nzc.Student(java.lang.String,java.lang.String)\n\u00a0o2===&gt;Student(username=null, school=null, age=null)\n\u00a0o3===&gt;Student(username=\u5b81\u5728\u66252, school=xxxx\u793e\u4f1a, age=null)<\/code><\/pre>\n<h3>3.2\u3001\u53cd\u5c04\u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u6210\u5458\u53d8\u91cf\u4fe1\u606f<\/h3>\n<p><code>class<\/code>\u5bf9\u8c61\u4e2d\u83b7\u53d6\u7c7b\u6210\u5458\u4fe1\u606f\u4f7f\u7528\u5230\u7684API<\/p>\n<pre><code>\u00a0Field[] getFields();\n\u00a0 \n\u00a0Field[] getDeclaredFields();\n\u00a0\u200b\n\u00a0Field getDeclaredField(String name);\n\u00a0\u200b\n\u00a0public native Class&lt;? super T&gt; getSuperclass();<\/code><\/pre>\n<p>\u8fd9\u91cc\u7684 <code>Field<\/code> \u7c7b\u5bf9\u8c61\uff0c\u5176\u5b9e\u5c31\u662f\u8868\u793a\u7c7b\u5bf9\u8c61\u4e2d\u7684\u6210\u5458\u5c5e\u6027\uff0c\u4e0d\u8fc7\u8fd8\u6709\u591a\u4e86\u5f88\u591a\u5176\u4ed6\u5728\u53cd\u5c04\u65f6\u9700\u8981\u7528\u5230\u7684\u5c5e\u6027\u548cAPI\u7f62\u4e86~<\/p>\n<h4>3.2.1\u3001\u83b7\u53d6\u79c1\u6709\u516c\u6709\u7c7b\u6210\u5458\u4fe1\u606f<\/h4>\n<p>\u4e3a\u4e86\u6709\u66f4\u597d\u7684\u5bf9\u6bd4\uff0c\u6211\u5148\u7f16\u5199\u4e86\u4e00\u6bb5\u4e0d\u4f7f\u7528\u53cd\u5c04\u65f6\u7684\u6b63\u5e38\u64cd\u4f5c\u3002<\/p>\n<pre><code>\u00a0\/**\n\u00a0 \u00a0 \u00a0 * \u4e0d\u4f7f\u7528\u53cd\u5c04\u7684\u8fdb\u884c\u64cd\u4f5c\n\u00a0 \u00a0 \u00a0 *\/\n\u00a0@Test\n\u00a0public void test1() {\n\u00a0 \u00a0 \u00a0Student student = new Student();\n\u00a0 \u00a0 \u00a0student.setUsername(&quot;username&quot;);\n\u00a0 \u00a0 \u00a0student.setSchool(&quot;xxxx\u793e\u4f1a&quot;);\n\u00a0 \u00a0 \u00a0student.setScore(100.0);\n\u00a0 \u00a0 \u00a0\/\/ \u6c38\u8fdc\u4e09\u5c81\u7684\u5c0f\u4f19\u5b50 \u54c8\u54c8 \ud83e\udd21\n\u00a0 \u00a0 \u00a0student.setAge(3);\n\u00a0 \u00a0 \u00a0student.setSex(&quot;\u7537&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0System.out.println(&quot;student\u4fe1\u606f===&gt;&quot; + student);\n\u00a0 \u00a0 \u00a0\/\/ out:student\u4fe1\u606f===&gt;Student(super=Person(sex=\u7537, age=3), username=username, school=xxxx\u793e\u4f1a, score=100.0)\n\u00a0}<\/code><\/pre>\n<p>\u73b0\u5728\u6211\u518d\u4f7f\u7528\u53cd\u5c04\u6765\u5b9e\u73b0\u4e0a\u8ff0\u64cd\u4f5c~<\/p>\n<p>\u5728\u5b9e\u73b0\u4e4b\u524d\uff0c\u8fd8\u662f\u5148\u6765\u770b\u770b\u5982\u4f55\u83b7\u53d6\u516c\u6709\u3001\u79c1\u6709\u7684\u6210\u5458\u53d8\u91cf\u5427<\/p>\n<pre><code>\u00a0@Test\n\u00a0public void test2() throws Exception {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0System.out.println(&quot;========\u83b7\u53d6\u6240\u6709 public \u4fee\u9970\u7684\u6210\u5458\u5c5e\u6027\uff08\u5305\u62ec\u7236\u7c7b\u5c5e\u6027\uff09=====&quot;);\n\u00a0 \u00a0 \u00a0Field[] fields = stuClass.getFields();\n\u00a0 \u00a0 \u00a0for (Field field : fields) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(field);\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0\/\/public java.lang.String com.nzc.Student.school\n\u00a0 \u00a0 \u00a0\/\/public java.lang.Integer com.nzc.Person.age\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0System.out.println(&quot;========\u83b7\u53d6\u6240\u6709(public\u3001private\u3001protected\u7b49\u4fee\u9970\u7684)\u5c5e\u6027\u6210\u5458\uff08\u4e0d\u5305\u62ec\u7236\u7c7b\u6210\u5458\u5c5e\u6027\uff09=====&quot;);\n\u00a0 \u00a0 \u00a0Field[] fields1 = stuClass.getDeclaredFields();\n\u00a0 \u00a0 \u00a0for (Field field : fields1) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(field);\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0\/\/private java.lang.String com.nzc.Student.username\n\u00a0 \u00a0 \u00a0\/\/public java.lang.String com.nzc.Student.school\n\u00a0 \u00a0 \u00a0\/\/private java.lang.Double com.nzc.Student.score\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0System.out.println(&quot;========\u901a\u8fc7\u53cd\u5c04\uff0c\u83b7\u53d6\u5bf9\u8c61\u6307\u5b9a\u7684\u5c5e\u6027=====&quot;);\n\u00a0 \u00a0 \u00a0Field username = stuClass.getDeclaredField(&quot;username&quot;);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;username===&gt;&quot; + username);\n\u00a0}<\/code><\/pre>\n<p>\u4f46\u662f\u4f60\u53d1\u73b0\u6ca1\u6709\uff0c\u8fd9\u65e0\u6cd5\u83b7\u53d6\u5230\u7236\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u4fe1\u606f\uff0c\u7236\u7c7b\u7684\u4fe1\u606f\uff0c\u6211\u4eec\u8be5\u5982\u4f55\u83b7\u53d6\u5462\uff1f<\/p>\n<h4>3.2.2\u3001\u83b7\u53d6\u7236\u7c7b\u6210\u5458\u5c5e\u6027\u4fe1\u606f<\/h4>\n<p>\u5176\u5b9e\u4e00\u6837\u7684\uff0c\u6211\u4eec\u4e5f\u662f\u8981\u83b7\u53d6\u5230\u7236\u7c7b\u7684<code>Class<\/code>\u5bf9\u8c61\uff0c\u5728<code>Class API<\/code>\u4e2d\u6709\u4e00\u4e2a<code>getSuperClass()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u5230\u7236\u7c7b\u7684<code>class<\/code>\u5bf9\u8c61\uff0c\u5176\u4ed6\u7684\u64cd\u4f5c\u90fd\u662f\u4e00\u6837\u7684~<\/p>\n<pre><code>\u00a0@Test\n\u00a0public void test5() throws ClassNotFoundException {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;========\u83b7\u53d6\u6240\u6709\u5c5e\u6027\u6210\u5458\uff08\u5305\u62ec\u7236\u7c7b\u6210\u5458\u5c5e\u6027\uff09=====&quot;);\n\u00a0 \u00a0 \u00a0Class clazz = stuClass;\n\u00a0 \u00a0 \u00a0List&lt;Field&gt; fieldList = new ArrayList&lt;&gt;();\n\u00a0 \u00a0 \u00a0while (clazz != null) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0fieldList.addAll(new ArrayList&lt;&gt;(Arrays.asList(clazz.getDeclaredFields())));\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0clazz = clazz.getSuperclass();\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0Field[] fields2 = new Field[fieldList.size()];\n\u00a0 \u00a0 \u00a0fieldList.toArray(fields2);\n\u00a0 \u00a0 \u00a0for (Field field : fields2) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(field);\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0\/\/private java.lang.String com.nzc.Student.username\n\u00a0 \u00a0 \u00a0\/\/public java.lang.String com.nzc.Student.school\n\u00a0 \u00a0 \u00a0\/\/private java.lang.Double com.nzc.Student.score\n\u00a0 \u00a0 \u00a0\/\/private java.lang.String com.nzc.Person.sex\n\u00a0 \u00a0 \u00a0\/\/public java.lang.Integer com.nzc.Person.age\n\u00a0}<\/code><\/pre>\n<p>\u5230\u8fd9\u91cc\u6211\u4eec\u5df2\u7ecf\u77e5\u9053\u5982\u4f55\u83b7\u53d6\u5230\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u4fe1\u606f\u4e86\uff0c\u5c31\u53ef\u4ee5\u6765\u770b\u770b\u5982\u4f55\u7ed9\u5b83\u4eec\u8bbe\u7f6e\u503c\uff0c\u6216\u8005\u901a\u8fc7\u53cd\u5c04\u7684\u65b9\u5f0f\u6765\u83b7\u53d6\u5230\u503c\u4e86\u3002<\/p>\n<h4>3.2.3\u3001\u8bbe\u7f6e\u6216\u4fee\u6539\u7c7b\u6210\u5458\u53d8\u91cf\u503c<\/h4>\n<pre><code>\u00a0@Test\n\u00a0public void test3() throws Exception {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;\u83b7\u53d6\u5230 filed \u540e\uff0c\u8bbe\u7f6e\u503c\u6216\u4fee\u6539\u503c&quot;);\n\u00a0 \u00a0 \u00a0Constructor&lt;?&gt; constructor = stuClass.getConstructor();\n\u00a0 \u00a0 \u00a0Object o = constructor.newInstance();\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0\/\/\u64cd\u4f5cpubilc \u5c5e\u6027\n\u00a0 \u00a0 \u00a0Field school = stuClass.getDeclaredField(&quot;school&quot;);\n\u00a0 \u00a0 \u00a0school.set(o,&quot;xxxx\u793e\u4f1a&quot;);\n\u00a0 \u00a0 \u00a0System.out.println(o);\n\u00a0 \u00a0 \u00a0\/\/Student(super=Person(sex=null, age=null), username=null, school=xxxx\u793e\u4f1a, score=null)\n\u00a0 \u00a0 \u00a0\/\/ \u53e6\u5916\u65e2\u7136\u53ef\u4ee5\u8bbe\u7f6e\uff0c\u90a3\u4e48\u81ea\u7136\u4e5f\u662f\u53ef\u4ee5\u83b7\u53d6\u7684\n\u00a0 \u00a0 \u00a0System.out.println(school.get(o));\n\u00a0 \u00a0 \u00a0\/\/xxxx\u793e\u4f1a\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0\/\/ \u64cd\u4f5c private \u4fee\u9970\u7684\u6210\u5458\u5c5e\u6027\n\u00a0 \u00a0 \u00a0Field name = stuClass.getDeclaredField(&quot;username&quot;);\n\u00a0 \u00a0 \u00a0\/\/ setAccessible(true) \u56e0\u4e3a\u662f\u83b7\u53d6private \u4fee\u9970\u7684\u6210\u5458\u53d8\u91cf\n\u00a0 \u00a0 \u00a0\/\/ \u4e0d\u8bbe\u7f6e\u66b4\u529b\u53cd\u5c04 \u662f\u65e0\u6cd5\u83b7\u53d6\u5230\u7684\uff0c\u4f1a\u76f4\u63a5\u62a5 IllegalAccessException \u5f02\u5e38\n\u00a0 \u00a0 \u00a0name.setAccessible(true);\n\u00a0 \u00a0 \u00a0name.set(o,&quot;Ningzaichun&quot;);\n\u00a0 \u00a0 \u00a0name.setAccessible(false);\n\u00a0 \u00a0 \u00a0System.out.println(o);\n\u00a0 \u00a0 \u00a0\/\/Student(super=Person(sex=null, age=null), username=Ningzaichun, school=xxxx\u793e\u4f1a, score=null)\n\u00a0}<\/code><\/pre>\n<p>\u5176\u5b9e\u770b\u5230\u8fd9\u91cc\u5bf9\u4e8e\u53cd\u5c04\u5df2\u7ecf\u6709\u4e2a\u5927\u6982\u7684\u5370\u8c61\u4e86\uff0c\u5e76\u4e14\u8fd9\u90fd\u662f\u6bd4\u8f83\u5e73\u5e38\u4e14\u5b9e\u7528\u7684\u4e00\u4e9b\u65b9\u6cd5\u3002<\/p>\n<h4>3.2.4\u3001\u83b7\u53d6\u6210\u5458\u53d8\u91cf\u6ce8\u89e3\u4fe1\u606f<\/h4>\n<pre><code>\u00a0@Test\n\u00a0public void test4() throws Exception {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0 \u00a0 \u00a0Field school = stuClass.getDeclaredField(&quot;school&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0LikeAnnotation annotation = school.getAnnotation(LikeAnnotation.class);\n\u00a0 \u00a0 \u00a0System.out.println(annotation);\n\u00a0 \u00a0 \u00a0\/\/@com.nzc.LikeAnnotation(params=[], value=)\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0Annotation[] annotations = school.getAnnotations();\n\u00a0 \u00a0 \u00a0for (Annotation annotation1 : annotations) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(annotation1);\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0\/\/@com.nzc.LikeAnnotation(params=[], value=)\n\u00a0\u200b\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0LikeAnnotation declaredAnnotation = school.getDeclaredAnnotation(LikeAnnotation.class);\n\u00a0 \u00a0 \u00a0System.out.println(declaredAnnotation);\n\u00a0 \u00a0 \u00a0\/\/@com.nzc.LikeAnnotation(params=[], value=)\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0Annotation[] declaredAnnotations = school.getDeclaredAnnotations();\n\u00a0 \u00a0 \u00a0for (Annotation declaredAnnotation1 : declaredAnnotations) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(declaredAnnotation1);\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0\/\/@com.nzc.LikeAnnotation(params=[], value=)\n\u00a0}<\/code><\/pre>\n<p>\u5173\u4e8egetAnnotation\u3001getDeclaredAnnotation \u7684\u5206\u6790\u5927\u5bb6\u53ef\u4ee5\u770b\u770b\u4e0b\u9762\u8fd9\u7bc7\u6587\u7ae0<a href=\"https:\/\/link.segmentfault.com\/?enc=XP30TfciFiOoBEyrSvM0Nw%3D%3D.DM3wSU3asNWYe84HiRz8%2B97RsUWCLVyc8%2B%2BaOOfJJptP1AoSbEkM3TC0FYAs0xlQLIjPBtYbDUr3A3HbQNhoVw%3D%3D\" rel=\"nofollow\">@Repeatable\u8be6\u89e3-getAnnotation\u3001getDeclaredAnnotation\u83b7\u53d6\u4e0d\u5230\u5bf9\u8c61<\/a><\/p>\n<p>\u5bf9\u4e8e\u60f3\u8981\u66f4\u8be6\u7ec6\u7684\u4e86\u89e3Java\u6ce8\u89e3\u7684\u670b\u53cb\uff0c\u5927\u5bb6\u53ef\u4ee5\u7ee7\u7eed\u627e\u627e\u76f8\u5173\u8d44\u6599\u3002<\/p>\n<h3>3.3\u3001\u53cd\u5c04\u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u5bf9\u5bf9\u8c61\u65b9\u6cd5\u4fe1\u606f\u5e76\u8c03\u7528<\/h3>\n<p>Class\u5bf9\u8c61\u4e2d\u4f7f\u7528\u7684\u76f8\u5173API<\/p>\n<pre><code>\u00a0Method[] getMethods();\n\u00a0\u200b\n\u00a0Method getMethod(String name, Class&lt;?&gt;... parameterTypes);\n\u00a0\u200b\n\u00a0Method[] getDeclaredMethods();\n\u00a0\u200b\n\u00a0Method getDeclaredMethod(String name, Class&lt;?&gt;... parameterTypes);\n\u00a0\u200b\n\u00a0\/\/ \u83b7\u53d6\u65b9\u6cd5\u8fd4\u56de\u503c\u7c7b\u578b\n\u00a0Class&lt;?&gt; getReturnType();\n\u00a0\u200b\n\u00a0\/\/ obj \u2013 \u8c03\u7528\u5e95\u5c42\u65b9\u6cd5\u7684\u5bf9\u8c61 \n\u00a0\/\/ args \u2013 \u7528\u4e8e\u65b9\u6cd5\u8c03\u7528\u7684\u53c2\u6570 \n\u00a0\/\/ return \u4f7f\u7528\u53c2\u6570args\u5728obj\u4e0a\u8c03\u5ea6\u6b64\u5bf9\u8c61\u8868\u793a\u7684\u65b9\u6cd5\u7684\u7ed3\u679c\n\u00a0Object invoke(Object obj, Object... args)<\/code><\/pre>\n<h4>3.3.1\u3001\u83b7\u53d6\u5bf9\u8c61\u65b9\u6cd5<\/h4>\n<p>\u83b7\u53d6\u516c\u6709\u3001\u79c1\u6709\u65b9\u6cd5<\/p>\n<pre><code>\u00a0@Test\n\u00a0public void test1() throws Exception {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0System.out.println(&quot;========\u83b7\u53d6\u6240\u6709public\u4fee\u9970\u7684\u65b9\u6cd5======&quot;);\n\u00a0 \u00a0 \u00a0Method[] methods = stuClass.getMethods();\n\u00a0 \u00a0 \u00a0for (Method method : methods) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(method);\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0\/\/public boolean com.nzc.Student.equals(java.lang.Object)\n\u00a0 \u00a0 \u00a0\/\/public java.lang.String com.nzc.Student.toString()\n\u00a0 \u00a0 \u00a0\/\/public int com.nzc.Student.hashCode()\n\u00a0 \u00a0 \u00a0\/\/public void com.nzc.Student.hello()\n\u00a0 \u00a0 \u00a0\/\/public void com.nzc.Student.say(java.lang.String)\n\u00a0 \u00a0 \u00a0\/\/public java.lang.Double com.nzc.Student.getScore()\n\u00a0 \u00a0 \u00a0\/\/public void com.nzc.Student.setScore(java.lang.Double)\n\u00a0 \u00a0 \u00a0\/\/public void com.nzc.Student.setSchool(java.lang.String) .... \u8fd8\u6709\u4e00\u4e9b\u6ca1\u5199\u51fa\u6765\u4e86\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0System.out.println(&quot;========\u83b7\u53d6\u5bf9\u8c61\u3010\u6307\u5b9a\u7684public\u4fee\u9970\u7684\u65b9\u6cd5\u3011======&quot;);\n\u00a0 \u00a0 \u00a0\/\/ \u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\u65b9\u6cd5\u540d\uff0c\u6b64\u5904\u662f\u83b7\u53d6public\u4fee\u9970\u7684\u65e0\u53c2\u65b9\u6cd5\n\u00a0 \u00a0 \u00a0Method hello = stuClass.getMethod(&quot;hello&quot;);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;hello===&gt;&quot;+hello);\n\u00a0 \u00a0 \u00a0\/\/ \u5e26\u53c2\u65b9\u6cd5\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u586b\u5199\u3010\u53c2\u6570\u7c7b\u578b\u3011\n\u00a0 \u00a0 \u00a0Method say = stuClass.getMethod(&quot;say&quot;, String.class);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;say===&gt;&quot;+say);\n\u00a0 \u00a0 \u00a0\/\/hello===&gt;public void com.nzc.Student.hello()\n\u00a0 \u00a0 \u00a0\/\/say===&gt;public void com.nzc.Student.say(java.lang.String)\n\u00a0\u200b\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0\/\/ \u53c2\u6570\u4e3a \u65b9\u6cd5\u540d\uff0c\u6b64\u5904\u662f\u83b7\u53d6 private \u4fee\u9970\u7684\u65e0\u53c2\u65b9\u6cd5\n\u00a0 \u00a0 \u00a0\/\/ stuClass.getDeclaredMethod(&quot;&quot;);\n\u00a0 \u00a0 \u00a0Method myScore = stuClass.getDeclaredMethod(&quot;myScore&quot;, Double.class);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;myScore==&gt;&quot;+myScore);\n\u00a0 \u00a0 \u00a0\/\/myScore==&gt;private void com.nzc.Student.myScore(java.lang.Double)\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0System.out.println(&quot;=======\u83b7\u53d6\u6240\u6709\u7684\u65b9\u6cd5=======&quot;);\n\u00a0 \u00a0 \u00a0Method[] declaredMethods = stuClass.getDeclaredMethods();\n\u00a0 \u00a0 \u00a0for (Method declaredMethod : declaredMethods) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(declaredMethod);\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0\/\/public void com.nzc.Student.say(java.lang.String)\n\u00a0 \u00a0 \u00a0\/\/private void com.nzc.Student.myScore(java.lang.Double)\n\u00a0 \u00a0 \u00a0\/\/public java.lang.Double com.nzc.Student.getScore()\n\u00a0 \u00a0 \u00a0\/\/public void com.nzc.Student.setScore(java.lang.Double)\n\u00a0 \u00a0 \u00a0\/\/protected boolean com.nzc.Student.canEqual(java.lang.Object)\n\u00a0}<\/code><\/pre>\n<p>\u65e2\u7136\u80fd\u83b7\u53d6\u5230\uff0c\u90a3\u4e48\u4e5f\u662f\u80fd\u591f\u8c03\u7528\u7684\u5566~\uff0c<\/p>\n<h4>3.3.2\u3001\u8c03\u7528\u5bf9\u8c61\u65b9\u6cd5<\/h4>\n<p>\u8fd8\u8bb0\u5f97\u7ecf\u5e38\u80fd\u770b\u5230\u7684\u4e00\u4e2a<code>invoke()<\/code>\u65b9\u6cd5\u5417\uff0c\u8fd9\u91cc\u5c31\u662f\u8c03\u7528<code>method.invoke()<\/code>\u65b9\u6cd5\u6765\u5b9e\u73b0\u65b9\u6cd5\u7684\u8c03\u7528\u3002<\/p>\n<pre><code>\u00a0@Test\n\u00a0public void test2() throws Exception {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0 \u00a0 \u00a0Constructor&lt;?&gt; constructor = stuClass.getConstructor();\n\u00a0 \u00a0 \u00a0Object o = constructor.newInstance();\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0Method myScore = stuClass.getDeclaredMethod(&quot;myScore&quot;, Double.class);\n\u00a0 \u00a0 \u00a0myScore.setAccessible(true);\n\u00a0 \u00a0 \u00a0\/\/ \u8c03\u7528\u65b9\u6cd5\n\u00a0 \u00a0 \u00a0myScore.invoke(o, 99.0);\n\u00a0 \u00a0 \u00a0\/\/ \u76f8\u5f53\u4e8e Student student= new Student();\n\u00a0 \u00a0 \u00a0\/\/ student.myScore(99.0);\n\u00a0 \u00a0 \u00a0myScore.setAccessible(false);\n\u00a0}<\/code><\/pre>\n<p>\u4e4b\u524d\u9610\u8ff0\u4e86 <code>Method<\/code>\u5b83\u672c\u8eab\u5c31\u8bb0\u5f55\u4e86\u65b9\u6cd5\u7684\u4e00\u5207\u4fe1\u606f\uff0c\u6211\u4eec\u5b9e\u73b0\u8c03\u7528\u4e5f\u5c31\u662f\u7b2c\u4e00\u6b65\u7f62\u4e86\uff0c\u8bf4\u5b83\u53ef\u4ee5\u83b7\u53d6\u5230\u5f53\u65f6\u5b9a\u4e49\u65b9\u6cd5\u7684\u4e00\u5207\u90fd\u4e0d\u4e3a\u8fc7\uff0c\u63a5\u4e0b\u6765\u4e00\u6b65\u4e00\u6b65\u6765\u8bf4\u5427\u3002<\/p>\n<h4>3.3.3\u3001\u83b7\u53d6\u65b9\u6cd5\u4e0a\u7684\u6ce8\u89e3\u4fe1\u606f<\/h4>\n<pre><code>\u00a0@Test\n\u00a0public void test2() throws Exception {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;==== \u83b7\u53d6\u6210\u5458\u53d8\u91cf\u4e0a\u6307\u5b9a\u7684\u6ce8\u89e3\u4fe1\u606f===&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0Field username = stuClass.getDeclaredField(&quot;username&quot;);\n\u00a0 \u00a0 \u00a0System.out.println(username);\n\u00a0 \u00a0 \u00a0\/\/private java.lang.String com.nzc.Student.username\n\u00a0 \u00a0 \u00a0Annotation annotation = username.getAnnotation(LikeAnnotation.class);\n\u00a0 \u00a0 \u00a0System.out.println(annotation);\n\u00a0 \u00a0 \u00a0\/\/@com.nzc.LikeAnnotation(params=[], value=)\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0Method hello = stuClass.getDeclaredMethod(&quot;hello&quot;);\n\u00a0 \u00a0 \u00a0LikeAnnotation annotation1 = hello.getAnnotation(LikeAnnotation.class);\n\u00a0 \u00a0 \u00a0System.out.println(hello+&quot;====&quot;+annotation1);\n\u00a0 \u00a0 \u00a0\/\/ public void com.nzc.Student.hello()<a href=\"\/cdn-cgi\/l\/email-protection\" class=\"__cf_email__\" data-cfemail=\"0d303030304d6e62602363776e23416466684c636362796c79646263\">[email&#160;protected]<\/a>(params=[], value=)\n\u00a0}<\/code><\/pre>\n<h4>3.3.4\u3001\u83b7\u53d6\u65b9\u6cd5\u53c2\u6570\u53ca\u53c2\u6570\u6ce8\u89e3\u4fe1\u606f<\/h4>\n<p>\u4e0d\u8fc7\u5728\u5199\u9879\u76ee\u65f6\uff0c\u6709\u53ef\u80fd\u8fd8\u4f1a\u8981\u83b7\u53d6\u65b9\u6cd5\u53c2\u6570\u4e0a\u7684\u6ce8\u89e3\uff0c\u90a3\u8be5\u5982\u4f55\u83b7\u53d6\u65b9\u6cd5\u53c2\u6570\u5462\uff1f\u53c8\u8be5\u5982\u4f55\u83b7\u53d6\u65b9\u6cd5\u53c2\u6570\u7684\u6ce8\u89e3\u4fe1\u606f\u5462\uff1f<\/p>\n<pre><code>\u00a0@Test\n\u00a0public void test3() throws Exception {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;==== \u83b7\u53d6\u65b9\u6cd5\u53c2\u6570\u4e2d\u7684\u6ce8\u89e3\u4fe1\u606f===&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0Method annotationTest = stuClass.getDeclaredMethod(&quot;annotationTest&quot;,String.class,String.class);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; returnType = annotationTest.getReturnType();\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u6743\u9650\u4fee\u9970\u7b26\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(Modifier.toString(annotationTest.getModifiers()) );\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u5230\u5168\u90e8\u7684\u65b9\u6cd5\u53c2\u6570\n\u00a0 \u00a0 \u00a0Parameter[] parameters = annotationTest.getParameters();\n\u00a0 \u00a0 \u00a0for (Parameter parameter : parameters) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Annotation annotation = parameter.getAnnotation(LikeAnnotation.class);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0if(annotation!=null){\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u53c2\u6570\u7c7b\u578b\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Class&lt;?&gt; type = parameter.getType();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u53c2\u6570\u540d\u79f0\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0String name = parameter.getName();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(&quot;\u53c2\u6570\u7c7b\u578b&quot;+type+&quot;  \u53c2\u6570\u540d\u79f0==&gt;&quot;+name+&quot; \u53c2\u6570\u4e0a\u7684\u6ce8\u89e3\u4fe1\u606f&quot;+annotation);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/\u53c2\u6570\u7c7b\u578bclass java.lang.String  \u53c2\u6570\u540d\u79f0==&gt;arg0 \u53c2\u6570\u4e0a\u7684\u6ce8\u89e3\u4fe1\u606f@com.nzc.LikeAnnotation(params=[], value=)\n\u00a0 \u00a0 \u00a0 \u00a0  }\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u53c2\u6570\u4e0a\u5168\u90e8\u7684\u6ce8\u89e3\u4fe1\u606f\n\u00a0 \u00a0 \u00a0Annotation[][] parameterAnnotations = annotationTest.getParameterAnnotations();\n\u00a0 \u00a0 \u00a0for (int i = 0; i &lt; parameterAnnotations.length; i++) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0for (int i1 = 0; i1 &lt; parameterAnnotations[i].length; i1++) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(parameterAnnotations[i][i1]);\n\u00a0 \u00a0 \u00a0 \u00a0  }\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0\/\/ @com.nzc.LikeAnnotation(params=[], value=)\n\u00a0 \u00a0 \u00a0\/\/@com.nzc.MarkAnnotation(value=)\n\u00a0 \u00a0 \u00a0int parameterCount = annotationTest.getParameterCount();\n\u00a0 \u00a0 \u00a0System.out.println(&quot;\u83b7\u53d6\u53c2\u6570\u4e2a\u6570==&gt;&quot;+parameterCount);\n\u00a0}\n\u00a0\u200b\n\u00a0\u200b<\/code><\/pre>\n<h4>3.3.5\u3001\u83b7\u53d6\u65b9\u6cd5\u8fd4\u56de\u53c2\u6570\u548c\u65b9\u6cd5\u6743\u9650\u4fee\u9970\u7b26<\/h4>\n<pre><code>\u00a0@Test\n\u00a0public void test33() throws Exception {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0Method annotationTest = stuClass.getDeclaredMethod(&quot;annotationTest&quot;,String.class,String.class);\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; returnType = annotationTest.getReturnType();\n\u00a0 \u00a0 \u00a0System.out.println(returnType);\n\u00a0 \u00a0 \u00a0\/\/void\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u6743\u9650\u4fee\u9970\u7b26\n\u00a0 \u00a0 \u00a0System.out.println(Modifier.toString(annotationTest.getModifiers()) );\n\u00a0 \u00a0 \u00a0\/\/public\n\u00a0}<\/code><\/pre>\n<h3>3.4\u3001\u53cd\u5c04\u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u4fe1\u606f\u3001\u63a5\u53e3\u4fe1\u606f\u3001\u5305\u4fe1\u606f<\/h3>\n<h4>3.4.1\u3001\u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u7684\u63a5\u53e3\u4fe1\u606f<\/h4>\n<pre><code>\u00a0\/**\n\u00a0 \u00a0 \u00a0 *  \u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u5b9e\u73b0\u7684\u63a5\u53e3\n\u00a0 \u00a0 \u00a0 *\/\n\u00a0@Test\n\u00a0public void test5() {\n\u00a0 \u00a0 \u00a0Class clazz = Student.class;\n\u00a0 \u00a0 \u00a0Class[] interfaces = clazz.getInterfaces();\n\u00a0 \u00a0 \u00a0for (Class c : interfaces) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(c);\n\u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0System.out.println(&quot;====================&quot;);\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u7684\u7236\u7c7b\u5b9e\u73b0\u7684\u63a5\u53e3\n\u00a0 \u00a0 \u00a0Class[] interfaces1 = clazz.getSuperclass().getInterfaces();\n\u00a0 \u00a0 \u00a0for (Class c : interfaces1) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(c);\n\u00a0 \u00a0  }\n\u00a0}<\/code><\/pre>\n<h4>3.4.2\u3001\u83b7\u53d6\u7c7b\u6240\u5728\u5305\u7684\u4fe1\u606f<\/h4>\n<pre><code>\u00a0\/**\n\u00a0 \u00a0 \u00a0 * \u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u6240\u5728\u7684\u5305\n\u00a0 \u00a0 \u00a0 *\/\n\u00a0@Test\n\u00a0public void test6() {\n\u00a0 \u00a0 \u00a0Class clazz = Person.class;\n\u00a0 \u00a0 \u00a0Package pack = clazz.getPackage();\n\u00a0 \u00a0 \u00a0System.out.println(pack);\n\u00a0 \u00a0 \u00a0\/\/ out:package com.nzc\n\u00a0}<\/code><\/pre>\n<h4>3.4.3\u3001\u83b7\u53d6\u7c7b\u4e0a\u6ce8\u89e3\u4fe1\u606f<\/h4>\n<pre><code>\u00a0@Test\n\u00a0public void test1() throws Exception {\n\u00a0 \u00a0 \u00a0Class&lt;?&gt; stuClass = Class.forName(&quot;com.nzc.Student&quot;);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;==== \u83b7\u53d6\u7c7b\u4e0a\u6307\u5b9a\u7684\u6ce8\u89e3\u4fe1\u606f===&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0LikeAnnotation annotation = stuClass.getAnnotation(LikeAnnotation.class);\n\u00a0 \u00a0 \u00a0System.out.println(annotation);\n\u00a0 \u00a0 \u00a0\/\/@com.nzc.LikeAnnotation(params=[], value=123)\n\u00a0 \u00a0 \u00a0System.out.println(&quot;\u83b7\u53d6\u6ce8\u89e3\u4e0a\u7684\u503c\u4fe1\u606f==&gt;&quot;+annotation.value());\n\u00a0 \u00a0 \u00a0\/\/\u83b7\u53d6\u6ce8\u89e3\u4e0a\u7684\u503c\u4fe1\u606f==&gt;123\n\u00a0 \u00a0 \u00a0\/\/annotation.params(); \u6ce8\u89e3\u6709\u51e0\u4e2a\u5c5e\u6027\uff0c\u5c31\u53ef\u4ee5\u83b7\u53d6\u51e0\u4e2a\u5c5e\u6027\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0System.out.println(&quot;====  \u83b7\u53d6\u7c7b\u4e0a\u5168\u90e8\u6ce8\u89e3\u4fe1\u606f===&quot;);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0Annotation[] annotations = stuClass.getAnnotations();\n\u00a0 \u00a0 \u00a0for (Annotation annotation1 : annotations) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(annotation1);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/@com.nzc.LikeAnnotation(params=[], value=123)\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0LikeAnnotation declaredAnnotation = stuClass.getDeclaredAnnotation(LikeAnnotation.class);\n\u00a0 \u00a0 \u00a0System.out.println(&quot;declaredAnnotation==&gt;&quot;+declaredAnnotation);\n\u00a0 \u00a0 \u00a0\/\/declaredAnnotation==&gt;@com.nzc.LikeAnnotation(params=[], value=123)\n\u00a0 \u00a0 \u00a0Annotation[] declaredAnnotations = stuClass.getDeclaredAnnotations();\n\u00a0\u200b\n\u00a0}<\/code><\/pre>\n<p><code>\u6ce8\u610f<\/code>\uff1alombok \u76f8\u5173\u7684\u6ce8\u89e3\u662f\u65e0\u6cd5\u83b7\u53d6\u5230\u7684\uff0c\u56e0\u4e3a lombok \u6ce8\u89e3\u4e3a\u7f16\u8bd1\u65f6\u6ce8\u89e3\uff0c\u5e76\u975e\u662f\u8fd0\u884c\u65f6\u6ce8\u89e3\uff0c\u5728\u7f16\u8bd1\u5b8c\u6210\u540e\uff0clombok \u6ce8\u89e3\u5e76\u4e0d\u4f1a\u4fdd\u7559\u4e8e<code>class<\/code>\u6587\u4ef6\u4e2d\uff0c\u56e0\u6b64\u662f\u65e0\u6cd5\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u5230\u7684\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2vEe\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p><code>@Data<\/code> \u4e5f\u6807\u660e\u4e86\u5b83\u7684\u5b58\u5728\u7ea7\u522b\u4e3a\u6e90\u7801\u7ea7\u522b\uff0c\u800c\u8fd0\u884c\u65f6\u5b58\u5728\u6ce8\u89e3<code>@Retention<\/code>\u4e3a<code>@Retention(RetentionPolicy.RUNTIME)<\/code> \u3002<\/p>\n<h4>3.5\u3001\u53cd\u5c04\u83b7\u53d6\u8fd0\u884c\u65f6\u7c7b\u7684\u7236\u7c7b\u7684\u6cdb\u578b\u4fe1\u606f\u3001\u63a5\u53e3\u6cdb\u578b\u4fe1\u606f<\/h4>\n<pre><code>\u00a0@Test\n\u00a0public void test8(){\n\u00a0 \u00a0 \u00a0Class clazz = Person.class;\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u6cdb\u578b\u7236\u7c7b\u4fe1\u606f\n\u00a0 \u00a0 \u00a0Type genericSuperclass = clazz.getGenericSuperclass();\n\u00a0 \u00a0 \u00a0System.out.println(genericSuperclass);\n\u00a0 \u00a0 \u00a0\/\/ com.nzc.Generic&lt;java.lang.String&gt;\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u6cdb\u578b\u63a5\u53e3\u4fe1\u606f\n\u00a0 \u00a0 \u00a0Type[] genericInterfaces = clazz.getGenericInterfaces();\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0for (Type genericInterface : genericInterfaces) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(genericInterface);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/interface com.nzc.TestService\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/com.nzc.GenericInterface&lt;java.lang.String&gt;\n\u00a0 \u00a0  }\n\u00a0}<\/code><\/pre>\n<h2>\u56db\u3001\u53cd\u5c04\u5e94\u7528\u573a\u666f\u53ca\u5b9e\u6218\u6848\u4f8b<\/h2>\n<h3>5.1\u3001\u90a3\u5230\u5e95\u4ec0\u4e48\u65f6\u5019\u4f1a\u4f7f\u7528\u53cd\u5c04<\/h3>\n<p>\u4e00\u53e5\u8bdd\u8bf4\u5b83\u7684\u5e94\u7528\u573a\u666f\u5c31\u662f\uff1a<code>\u786e\u5b9a\u4e0d\u4e0b\u6765\u5230\u5e95\u4f7f\u7528\u54ea\u4e2a\u7c7b\u7684\u65f6\u5019<\/code>\uff0c\u6bd4\u5982\u4f60\u8981\u5f00\u53d1\u4e00\u4e2a\u901a\u7528\u5de5\u5177\u7c7b\uff0c\u4e3a\u4e86\u8fbe\u5230\u901a\u7528\u6027\uff0c\u4f20\u5165\u7684\u53c2\u6570\u5bf9\u8c61\uff0c\u4e00\u822c\u90fd\u662f\u65e0\u6cd5\u9650\u5236\u7684\uff0c\u8fd9\u4e2a\u65f6\u5019\u5c31\u662f\u8981\u7528\u5230\u53cd\u5c04\u5566~\u3002<\/p>\n<p>\u53cd\u5c04\u7684\u7279\u5f81\uff1a\u52a8\u6001\u6027<\/p>\n<h3>5.2\u3001AOP + \u81ea\u5b9a\u4e49\u6ce8\u89e3 \u4fee\u6539\u524d\u7aef\u4f20\u9012\u7684\u53c2\u6570\u4fe1\u606f<\/h3>\n<p>\u9700\u6c42\u5982\u4e0b\uff1a\u6211\u73b0\u5728\u5f15\u5165\u4e86\u4e00\u4e2a\u7b2c\u4e09\u65b9 jar \u5305\uff0c\u91cc\u9762\u6709\u4e00\u4e2a MyBatis-Plus \u67e5\u8be2\u6784\u9020\u5668\uff0c\u5176\u4e2d\u6784\u9020 <code>LIKE<\/code>\u6761\u4ef6\u67e5\u8be2\u7684\u6761\u4ef6\u662f\u5f53\u524d\u7aef\u4f20\u8fc7\u6765\u7684\u53c2\u6570\u5e26\u6709\u9017\u53f7\u65f6\uff0c\u62fc\u63a5\u4e3a<code>LIKE<\/code>\u67e5\u8be2\u6761\u4ef6\u3002<\/p>\n<p>\u5173\u952e\u4ee3\u7801\uff1a<\/p>\n<p>\u6807\u8bc6\u5728\u5bf9\u8c61\u7684\u67d0\u4e2a\u6210\u5458\u5c5e\u6027\u4e0a<\/p>\n<pre><code>\u00a0@Target({ElementType.METHOD, ElementType.FIELD})\n\u00a0@Retention(RetentionPolicy.RUNTIME)\n\u00a0@Documented\n\u00a0public @interface LikeAnnotation {\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0String value() default &quot;&quot;;\n\u00a0}\n\u00a0\u200b<\/code><\/pre>\n<p>\u6807\u8bc6\u5728Controller\u5c42\u4e0a\uff0c\u4ee5\u6b64\u6765\u5224\u65ad\u90a3\u4e9b\u8bf7\u6c42\u662f\u9700\u8981\u88ab\u5207\u5165\u7684\u3002<\/p>\n<pre><code>\u00a0@Target({ElementType.PARAMETER, ElementType.METHOD, ElementType.FIELD})\n\u00a0@Retention(RetentionPolicy.RUNTIME)\n\u00a0@Documented\n\u00a0public @interface MarkAnnotation {\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0String value() default &quot;&quot;;\n\u00a0\u200b\n\u00a0}<\/code><\/pre>\n<p>\u4e00\u4e2a\u975e\u5e38\u7b80\u5355\u7684Javabean<\/p>\n<pre><code>\u00a0@Data\n\u00a0public class Login {\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0@LikeAnnotation(value = &quot;username&quot;)\n\u00a0 \u00a0 \u00a0private String username;\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0private String password;\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0public Login() {\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0public Login(String username, String password) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0this.username = username;\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0this.password = password;\n\u00a0 \u00a0  }\n\u00a0}\n\u00a0\u200b<\/code><\/pre>\n<p>Controller \u7c7b<\/p>\n<pre><code>\u00a0@Slf4j\n\u00a0@RestController\n\u00a0public class HelloController {\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0@MarkAnnotation\n\u00a0 \u00a0 \u00a0@GetMapping(&quot;\/search&quot;)\n\u00a0 \u00a0 \u00a0public Login getLikeLogin(Login login){\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0System.out.println(login);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0return login;\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0}<\/code><\/pre>\n<p>\u91cd\u70b9\u91cd\u70b9\uff0c\u5207\u9762\u7c7b <code>LikeAnnotationAspect<\/code>\uff0c\u5904\u7406\u903b\u8f91\u5168\u90e8\u5728\u6b64\u5904<\/p>\n<pre><code>\u00a0@Aspect\n\u00a0@Component\n\u00a0@Slf4j\n\u00a0public class LikeAnnotationAspect {\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0\/\/ \u6807\u8bb0\u4e86 @MarkAnnotation \u6ce8\u89e3\u7684\u624d\u5207\u5165 \u964d\u4f4e\u6027\u80fd\u6d88\u8017\n\u00a0 \u00a0 \u00a0@Pointcut(&quot;@annotation(com.nzc.annotation.MarkAnnotation)&quot;)\n\u00a0 \u00a0 \u00a0public void pointCut() {\n\u00a0\u200b\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u5f53\u524d\u7c7b\u53ca\u7236\u7c7b\u6240\u6709\u7684\u6210\u5458\u5c5e\u6027\n\u00a0 \u00a0 \u00a0private static Field[] getAllFields(Object object) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Class&lt;?&gt; clazz = object.getClass();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0List&lt;Field&gt; fieldList = new ArrayList&lt;&gt;();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0while (clazz != null) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0fieldList.addAll(new ArrayList&lt;&gt;(Arrays.asList(clazz.getDeclaredFields())));\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0clazz = clazz.getSuperclass();\n\u00a0 \u00a0 \u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Field[] fields = new Field[fieldList.size()];\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0fieldList.toArray(fields);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0return fields;\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0@Around(&quot;pointCut()&quot;)\n\u00a0 \u00a0 \u00a0public Object doAround(ProceedingJoinPoint pjp) throws Throwable {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0long start = System.currentTimeMillis();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Object[] args = pjp.getArgs();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u5230\u7b2c\u4e00\u4e2a\u53c2\u6570\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Object parameter = args[0];\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0log.info(&quot;parameter==&gt;{}&quot;, parameter);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0if (parameter == null) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0return pjp.proceed();\n\u00a0 \u00a0 \u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Field[] fields = getAllFields(parameter);\n\u00a0\u200b\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0for (Field field : fields) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0log.debug(&quot;------field.name------&quot; + field.getName());\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0if (field.getAnnotation(LikeAnnotation.class) != null) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0try {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0field.setAccessible(true);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Object username = field.get(parameter);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0field.setAccessible(false);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0if (username != null &amp;&amp; !username.equals(&quot;&quot;)) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0field.setAccessible(true);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0field.set(parameter, &quot;,&quot; + username + &quot;,&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0field.setAccessible(false);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0  } catch (Exception e) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0 \u00a0  }\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u8c03\u7528\u65b9\u6cd5\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Object result = pjp.proceed();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0long end = System.currentTimeMillis();\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0log.debug(&quot;\u4fee\u6539\u8017\u65f6==&gt;&quot; + (end - start) + &quot;ms&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0return result;\n\u00a0 \u00a0  }\n\u00a0\u200b\n\u00a0}<\/code><\/pre>\n<p>\u5b9e\u73b0\u6548\u679c\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042504995\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042504996\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<h3>5.3\u3001Mybatis \u62e6\u622a\u5668\u5b9e\u73b0\u81ea\u52a8\u586b\u5145\u521b\u5efa\u4eba\u3001\u4fee\u6539\u4eba\u4fe1\u606f<\/h3>\n<p>\u770b\u4f3c\u597d\u50cf\u5199\u4e1a\u52a1\u7684\u6211\u4eec\uff0c\u6ca1\u6709\u600e\u4e48\u63a5\u89e6Java\u53cd\u5c04\uff0c\u4f46\u5b9e\u9645\u4e0a\u53ef\u80fd\u5904\u5904\u90fd\u9690\u542b\u7740\u53cd\u5c04\u3002<\/p>\n<p>\u4f7f\u7528\u8fc7 Mybatis-Plus \u7684\u670b\u53cb\uff0c\u5e94\u8be5\u77e5\u9053\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u81ea\u52a8\u586b\u5145\u6570\u636e\uff08\u521b\u5efa\u65f6\u95f4\u3001\u66f4\u65b0\u65f6\u95f4\u3001\u521b\u5efa\u4eba\u3001\u66f4\u65b0\u4eba\u7b49\uff09\uff0c\u4e0d\u8fc7\u90a3\u4e2a\u662f\u5b9e\u73b0<code>MetaObjectHandler<\/code>\u63a5\u53e3\u8fdb\u884c\u5904\u7406\u7684\u3002<\/p>\n<p>\u4f46\u662f\u4eca\u5929\u7684\u8bdd\uff0c\u6211\u7528Mybatis \u539f\u751f\u7684\u62e6\u622a\u5668\u6765\u8fdb\u884c\u4e00\u756a\u5b9e\u73b0\uff0c\u5b9e\u73b0\u6bcf\u6b21\u66f4\u65b0\u3001\u6dfb\u52a0\u65f6\u81ea\u52a8\u586b\u5145\u521b\u5efa\u4eba\u3001\u66f4\u65b0\u4eba\u7b49\uff0c\u8868\u91cc\u6ca1\u65f6\u95f4\u5b57\u6bb5\uff0c\u5c31\u6ca1\u6f14\u793a\u65f6\u95f4\u4e86\uff0c\u4f46\u5b9e\u73b0\u539f\u7406\u90fd\u4e00\u81f4\u3002<\/p>\n<pre><code>\u00a0import lombok.extern.slf4j.Slf4j;\n\u00a0import org.apache.ibatis.binding.MapperMethod.ParamMap;\n\u00a0import org.apache.ibatis.executor.Executor;\n\u00a0import org.apache.ibatis.mapping.MappedStatement;\n\u00a0import org.apache.ibatis.mapping.SqlCommandType;\n\u00a0import org.apache.ibatis.plugin.*;\n\u00a0import org.springframework.stereotype.Component;\n\u00a0\u200b\n\u00a0import java.lang.reflect.Field;\n\u00a0import java.util.*;\n\u00a0\u200b\n\u00a0\/**\n\u00a0 * mybatis\u62e6\u622a\u5668\uff0c\u81ea\u52a8\u6ce8\u5165\u521b\u5efa\u4eba\u3001\u521b\u5efa\u65f6\u95f4\u3001\u4fee\u6539\u4eba\u3001\u4fee\u6539\u65f6\u95f4\n\u00a0 * @author Ning Zaichun\n\u00a0 *\/\n\u00a0@Slf4j\n\u00a0@Component\n\u00a0@Intercepts({ @Signature(type = Executor.class, method = &quot;update&quot;, args = { MappedStatement.class, Object.class }) })\n\u00a0public class MybatisInterceptor implements Interceptor {\n\u00a0    \n\u00a0    public static Field[] getAllFields(Object object) {\n\u00a0        Class&lt;?&gt; clazz = object.getClass();\n\u00a0        List&lt;Field&gt; fieldList = new ArrayList&lt;&gt;();\n\u00a0        while (clazz != null) {\n\u00a0            fieldList.addAll(new ArrayList&lt;&gt;(Arrays.asList(clazz.getDeclaredFields())));\n\u00a0            clazz = clazz.getSuperclass();\n\u00a0        }\n\u00a0        Field[] fields = new Field[fieldList.size()];\n\u00a0        fieldList.toArray(fields);\n\u00a0        return fields;\n\u00a0    }\n\u00a0\u200b\n\u00a0    @Override\n\u00a0    public Object intercept(Invocation invocation) throws Throwable {\n\u00a0        MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];\n\u00a0        String sqlId = mappedStatement.getId();\n\u00a0        log.info(&quot;------sqlId------&quot; + sqlId);\n\u00a0\/\/2022-09-17 17:16:50.714  INFO 14592 --- [nio-8080-exec-1] com.nzc.tree.commons.MybatisInterceptor  : ------sqlId------com.nzc.tree.mapper.CategoryMapper.updateById\n\u00a0        SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType();\n\u00a0        Object parameter = invocation.getArgs()[1];\n\u00a0        log.info(&quot;------sqlCommandType------&quot; + sqlCommandType);\n\u00a0\/\/2022-09-17 17:16:50.714  INFO 14592 --- [nio-8080-exec-1] com.nzc.tree.commons.MybatisInterceptor  : ------sqlCommandType------UPDATE\n\u00a0\u200b\n\u00a0        if (parameter == null) {\n\u00a0            return invocation.proceed();\n\u00a0        }\n\u00a0        if (SqlCommandType.INSERT == sqlCommandType) {\n\u00a0            Field[] fields = getAllFields(parameter);\n\u00a0            for (Field field : fields) {\n\u00a0                log.info(&quot;------field.name------&quot; + field.getName());\n\u00a0                try {\n\u00a0                    if (&quot;createBy&quot;.equals(field.getName())) {\n\u00a0                        field.setAccessible(true);\n\u00a0                        Object local_createBy = field.get(parameter);\n\u00a0                        field.setAccessible(false);\n\u00a0                        if (local_createBy == null || local_createBy.equals(&quot;&quot;)) {\n\u00a0                                field.setAccessible(true);\n\u00a0                                field.set(parameter, &quot;nzc-create&quot;);\n\u00a0                                field.setAccessible(false);\n\u00a0                            }\n\u00a0                    }\n\u00a0                } catch (Exception e) {\n\u00a0                    e.printStackTrace();\n\u00a0                }\n\u00a0            }\n\u00a0        }\n\u00a0        if (SqlCommandType.UPDATE == sqlCommandType) {\n\u00a0            Field[] fields = null;\n\u00a0            if (parameter instanceof ParamMap) {\n\u00a0                ParamMap&lt;?&gt; p = (ParamMap&lt;?&gt;) parameter;\n\u00a0                if (p.containsKey(&quot;et&quot;)) {\n\u00a0                    parameter = p.get(&quot;et&quot;);\n\u00a0                } else {\n\u00a0                    parameter = p.get(&quot;param1&quot;);\n\u00a0                }\n\u00a0                if (parameter == null) {\n\u00a0                    return invocation.proceed();\n\u00a0                }\n\u00a0\u200b\n\u00a0                fields = getAllFields(parameter);\n\u00a0            } else {\n\u00a0                fields = getAllFields(parameter);\n\u00a0            }\n\u00a0\u200b\n\u00a0            for (Field field : fields) {\n\u00a0                log.info(&quot;------field.name------&quot; + field.getName());\n\u00a0                try {\n\u00a0                    if (&quot;updateBy&quot;.equals(field.getName())) {\n\u00a0                            field.setAccessible(true);\n\u00a0                            field.set(parameter,&quot;nzc-update&quot;);\n\u00a0                            field.setAccessible(false);\n\u00a0                    }\n\u00a0                } catch (Exception e) {\n\u00a0                    e.printStackTrace();\n\u00a0                }\n\u00a0            }\n\u00a0        }\n\u00a0        return invocation.proceed();\n\u00a0    }\n\u00a0\u200b\n\u00a0    @Override\n\u00a0    public Object plugin(Object target) {\n\u00a0        return Plugin.wrap(target, this);\n\u00a0    }\n\u00a0\u200b\n\u00a0    @Override\n\u00a0    public void setProperties(Properties properties) {\n\u00a0        \/\/ TODO Auto-generated method stub\n\u00a0    }\n\u00a0}<\/code><\/pre>\n<p>\u91cc\u9762\u7275\u626f\u5230\u7684\u4e00\u4e9b Mybatis \u4e2d\u7684\u4e00\u4e9b\u5bf9\u8c61\uff0c\u6211\u6ca1\u7ec6\u8bf4\u4e86\uff0c\u5927\u5bb6\u6253\u5370\u51fa\u6765\u7684\u65f6\u5019\u90fd\u53ef\u4ee5\u770b\u5230\u7684\u3002<\/p>\n<p>\u6d4b\u8bd5\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2vD9\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u6267\u884c\u7684<code>SQL<\/code>\u8bed\u53e5\u6253\u5370\u4fe1\u606f<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2vD8\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u7ed3\u679c\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2vD7\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u53cd\u5c04\u7684\u7279\u6027\uff0c\u770b\u4f3c\u548c\u6211\u4eec\u5929\u5929\u5199\u4e1a\u52a1\u6ca1\u5565\u5173\u7cfb\uff0c\u4f46\u662f\u5b83\u5176\u5b9e\u4e00\u76f4\u4f34\u968f\u7740\u6211\u4eec\uff0c\u8fd9\u4e5f\u662f Java \u5f00\u53d1\u8005\u7684\u57fa\u7840\u77e5\u8bc6\uff0c\u57fa\u7840\u4e0d\u7262\uff0c\u5730\u52a8\u5c71\u6447~<\/p>\n<h3>\u4e94\u3001\u53cd\u5c04\u7684\u4f18\u7f3a\u70b9<\/h3>\n<p><strong>\u4f18\u70b9<\/strong>\uff1a \u53cd\u5c04\u63d0\u9ad8\u4e86\u7a0b\u5e8f\u7684\u7075\u6d3b\u6027\u548c\u6269\u5c55\u6027\uff0c\u964d\u4f4e\u8026\u5408\u6027\uff0c\u63d0\u9ad8\u81ea\u9002\u5e94\u80fd\u529b\u3002 \u5b83\u5141\u8bb8\u7a0b\u5e8f\u521b\u5efa\u548c\u63a7\u5236\u4efb\u4f55\u7c7b\u7684\u5bf9\u8c61\uff0c\u65e0\u9700\u63d0\u524d\u786c\u7f16\u7801\u76ee\u6807\u7c7b\uff1b<strong>\u5bf9\u4e8e\u4efb\u610f\u4e00\u4e2a\u7c7b\uff0c\u90fd\u80fd\u591f\u77e5\u9053\u8fd9\u4e2a\u7c7b\u7684\u6240\u6709\u5c5e\u6027\u548c\u65b9\u6cd5\uff1b\u5bf9\u4e8e\u4efb\u610f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u90fd\u80fd\u591f\u8c03\u7528\u5b83\u7684\u4efb\u610f\u4e00\u4e2a\u65b9\u6cd5<\/strong>\uff1b<\/p>\n<p><strong>\u7f3a\u70b9<\/strong> \uff1a\u8ba9\u6211\u4eec\u5728\u8fd0\u884c\u65f6\u6709\u4e86\u5206\u6790\u64cd\u4f5c\u7c7b\u7684\u80fd\u529b\uff0c\u8fd9\u540c\u6837\u4e5f\u589e\u52a0\u4e86\u5b89\u5168\u95ee\u9898\u3002\u6bd4\u5982\u53ef\u4ee5\u65e0\u89c6\u6cdb\u578b\u53c2\u6570\u7684\u5b89\u5168\u68c0\u67e5\uff08\u6cdb\u578b\u53c2\u6570\u7684\u5b89\u5168\u68c0\u67e5\u53d1\u751f\u5728\u7f16\u8bd1\u65f6\uff09\u3002\u53e6\u5916\uff0c\u53cd\u5c04\u7684\u6027\u80fd\u4e5f\u8981\u7a0d\u5dee\u70b9\uff0c\u4e0d\u8fc7\uff0c\u5bf9\u4e8e\u6846\u67b6\u6765\u8bf4\u5b9e\u9645\u662f\u5f71\u54cd\u4e0d\u5927\u7684\u3002<\/p>\n<blockquote><p><a href=\"https:\/\/link.segmentfault.com\/?enc=Dn8L9kqWKz62qRwUVJmSUA%3D%3D.XgqmFM3hCnAUI2BGEYEcA54DXUeqelpK345ARZgvrUMp9beNXDL%2B9kxVmI2KqfUg71CesuqU5CVTUjR%2ByAkULg%3D%3D\" rel=\"nofollow\">\u53cd\u5c04\u662f\u5426\u771f\u7684\u4f1a\u8ba9\u4f60\u7684\u7a0b\u5e8f\u6027\u80fd\u964d\u4f4e\u5417<\/a>?<\/p><\/blockquote>\n<p>1.\u53cd\u5c04\u5927\u6982\u6bd4\u76f4\u63a5\u8c03\u7528\u616250~100\u500d\uff0c\u4f46\u662f\u9700\u8981\u4f60\u5728\u6267\u884c100\u4e07\u904d\u7684\u65f6\u5019\u624d\u4f1a\u6709\u6240\u611f\u89c9<\/p>\n<p>2.\u5224\u65ad\u4e00\u4e2a\u51fd\u6570\u7684\u6027\u80fd\uff0c\u4f60\u9700\u8981\u628a\u8fd9\u4e2a\u51fd\u6570\u6267\u884c100\u4e07\u904d\u751a\u81f31000\u4e07\u904d<\/p>\n<p>3.\u5982\u679c\u4f60\u53ea\u662f\u5076\u5c14\u8c03\u7528\u4e00\u4e0b\u53cd\u5c04\uff0c\u8bf7\u5fd8\u8bb0\u53cd\u5c04\u5e26\u6765\u7684\u6027\u80fd\u5f71\u54cd<\/p>\n<p>4.\u5982\u679c\u4f60\u9700\u8981\u5927\u91cf\u8c03\u7528\u53cd\u5c04\uff0c\u8bf7\u8003\u8651\u7f13\u5b58\u3002<\/p>\n<p>5.\u4f60\u7684\u7f16\u7a0b\u7684\u601d\u60f3\u624d\u662f\u9650\u5236\u4f60\u7a0b\u5e8f\u6027\u80fd\u7684\u6700\u4e3b\u8981\u7684\u56e0\u7d20<\/p>\n<h3>\u5c0f\u7ed3<\/h3>\n<p>\u4ed4\u7ec6\u9605\u8bfb\u4e0b\u6765\u4f60\u4f1a\u53d1\u73b0\uff0c<\/p>\n<p>\u6b63\u5982\u6587\u4e2d\u6240\u8bf4\uff0c\u6240\u8c13<code>Class<\/code>\u5bf9\u8c61\uff0c\u4e5f\u79f0\u4e3a<strong>\u7c7b\u6a21\u677f\u5bf9\u8c61<\/strong>\uff0c\u5176\u5b9e\u5c31\u662f Java \u7c7b\u5728 JVM \u5185\u5b58\u4e2d\u7684\u4e00\u4e2a\u5feb\u7167\uff0cJVM \u5c06\u4ece\u5b57\u8282\u7801\u6587\u4ef6\u4e2d\u89e3\u6790\u51fa\u7684\u5e38\u91cf\u6c60\u3001 \u7c7b\u5b57\u6bb5\u3001\u7c7b\u65b9\u6cd5\u7b49\u4fe1\u606f\u5b58\u50a8\u5230\u6a21\u677f\u4e2d\uff0c\u8fd9\u6837 JVM \u5728\u8fd0\u884c\u671f\u4fbf\u80fd\u901a\u8fc7\u7c7b\u6a21\u677f\u800c\u83b7\u53d6 Java \u7c7b\u4e2d\u7684\u4efb\u610f\u4fe1\u606f\uff0c\u80fd\u591f\u5bf9 Java \u7c7b\u7684\u6210\u5458\u53d8\u91cf\u8fdb\u884c\u904d\u5386\uff0c\u4e5f\u80fd\u8fdb\u884c Java \u65b9\u6cd5\u7684\u8c03\u7528\uff0c\u83b7\u53d6\u5230\u7c7b\u7684\u4efb\u610f\u4fe1\u606f\u3002<\/p>\n<p>\u53cd\u5c04\u4e5f\u5c31\u662f\u8fd9\u6837\u5566\uff0c\u4e0d\u77e5\u9053\u4f60\u4f1a\u4f7f\u7528\u5566\u5417\uff0c\u5982\u679c\u4f60\u8fd8\u6ca1\u6709\u7684\u8bdd\uff0c\u6211\u89c9\u5f97\u53ef\u4ee5\u518d\u8bfb\u4e0a\u4e00\u904d\uff0c\u987a\u5e26\u81ea\u5df1\u9a8c\u8bc1\u4e00\u904d\uff0c\u5e0c\u671b\u4f60\u80fd\u6709\u6240\u6536\u83b7\u3002<\/p>\n<h3>\u540e\u8bb0<\/h3>\n<p>\u5176\u5b9e\u60f3\u5199\u8fd9\u7bc7\u6587\u7ae0\u65f6\u95f4\u5df2\u7ecf\u4e0d\u77ed\u4e86\uff0c\u4f46<code>\u61d2<\/code>\u5076\u5c14\u53d1\u4f5c\uff08\u6211\u53c8\u7ecf\u5e38\u5076\u5c14\uff09\uff0c\u6240\u4ee5\u603b\u662f\u4e00\u62d6\u518d\u62d6\uff0c\u8d81\u7740\u8fd9\u4e2a\u5468\u516d\uff0c\u7ec8\u4e8e\u628a\u5b83\u5b8c\u6210\u4e86\uff0c\u6211\u4e5f\u4e0d\u77e5\u9053\u4f60\u4f1a\u4e0d\u4f1a\u8bfb\u5230\u6b64\u5904\uff0c\u770b\u5230\u6211\u53d1\u7684\u7262\u9a9a\u3002<\/p>\n<p><strong>\u53ea\u662f\u975e\u5e38\u7b80\u5355\u7684\u5e0c\u671b\u6bcf\u4e00\u4f4d\u9605\u8bfb\u8005\u80fd\u591f\u6709\u6240\u6536\u83b7\uff0c\u8fd9\u5e94\u8be5\u662f\u6211\u6301\u7eed\u5199\u6587\u7684\u5feb\u4e50\u5427<\/strong>~<\/p>\n<p>\u4eca\u5929\u53c8\u662f\u597d\u503c\u7684\u4e00\u5929\u554a~<\/p>\n<p>\u5404\u4f4d\u4e0b\u6b21\u89c1\uff01<\/p>\n<p>\u5199\u4e8e 2022 \u5e74 9 \u6708 17 \u65e5\uff0c\u4f5c\u8005\uff1a\u5b81\u5728\u6625<\/p>\n<blockquote><p>\u672c\u6587\u53c2\u4e0e\u4e86<a href=\"https:\/\/segmentfault.com\/a\/1190000042453662\">\u601d\u5426\u6280\u672f\u5f81\u6587<\/a>\uff0c\u6b22\u8fce\u6b63\u5728\u9605\u8bfb\u7684\u4f60\u4e5f\u52a0\u5165\u3002<\/p><\/blockquote>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042504992\">https:\/\/segmentfault.com\/a\/1190000042504992<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f5c\u4e3aJava\u5f00\u53d1\u8005\uff0c\u4f60\u8ba4\u4e3a\u53cd\u5c04\u8fd9\u4e2a\u77e5\u8bc6\u70b9\u91cd\u8981\u7a0b\u5ea6\uff0c\u5728\u4f60\u5fc3\u91cc\u662f\u4ec0\u4e48\u6837\u7684\u5462\uff1f \u4ee5\u524d\u6211\u4e5f\u53ea\u89c9\u5f97\u53cd\u5c04\u975e\u5e38\u91cd\u8981\uff0c\u4f46\u603b\u5f52\u662f [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006585","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006585","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006585"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006585\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006585"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006585"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}