{"id":674,"date":"2025-02-13T23:25:20","date_gmt":"2025-02-13T15:25:20","guid":{"rendered":"http:\/\/www.cmd137blog.top\/?p=674"},"modified":"2025-02-13T23:25:22","modified_gmt":"2025-02-13T15:25:22","slug":"java-%e5%8f%8d%e5%b0%84%ef%bc%9a","status":"publish","type":"post","link":"http:\/\/www.cmd137blog.top\/?p=674","title":{"rendered":"JAVA \u53cd\u5c04\uff1a"},"content":{"rendered":"\n<p>\u53cd\u5c04\u7684\u771f\u6b63\u4ef7\u503c\u5728\u4e8e\u5904\u7406\u7f16\u8bd1\u65f6\u672a\u77e5\u7684\u7c7b\u578b\uff0c\u4ece\u800c\u7f16\u5199\u66f4\u901a\u7528\u5316\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u53cd\u5c04\u57fa\u7840\u6982\u5ff5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e00\uff09\u4ec0\u4e48\u662f\u53cd\u5c04<\/h3>\n\n\n\n<p>\u53cd\u5c04\u662f Java \u7684\u4e00\u79cd\u673a\u5236\uff0c\u5b83\u5141\u8bb8\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\u83b7\u53d6\u4efb\u4f55\u5df2\u77e5\u540d\u79f0\u7684\u7c7b\u7684\u5185\u90e8\u4fe1\u606f\uff0c\u5305\u62ec\u7c7b\u7684\u5c5e\u6027\u3001\u65b9\u6cd5\u3001\u6784\u9020\u51fd\u6570\u7b49\uff0c\u5e76\u4e14\u80fd\u591f\u5728\u8fd0\u884c\u65f6\u64cd\u4f5c\u8fd9\u4e9b\u6210\u5458\u3002\u901a\u8fc7\u53cd\u5c04\uff0cJava \u7a0b\u5e8f\u53ef\u4ee5\u5b9e\u73b0\u52a8\u6001\u52a0\u8f7d\u7c7b\u3001\u521b\u5efa\u5bf9\u8c61\u3001\u8c03\u7528\u65b9\u6cd5\u7b49\u64cd\u4f5c\uff0c\u8fd9\u5728\u8bb8\u591a\u573a\u666f\u4e0b\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e8c\uff09\u53cd\u5c04\u7684\u6838\u5fc3\u7c7b<\/h3>\n\n\n\n<p>\u5728 Java \u53cd\u5c04\u4f53\u7cfb\u4e2d\uff0cClass\u7c7b\u5904\u4e8e\u6838\u5fc3\u4e0e\u57fa\u7840\u7684\u5730\u4f4d \uff0c\u5b83\u4ee3\u8868\u4e00\u4e2a\u7c7b\u7684\u8fd0\u884c\u65f6\u5b9e\u4f8b\u3002\u5f53 JVM \u52a0\u8f7d\u7c7b\u65f6\uff0c\u4f1a\u4e3a\u6bcf\u4e2a\u7c7b\u521b\u5efa\u5bf9\u5e94\u7684Class\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u5305\u542b\u4e86\u7c7b\u7684\u5b8c\u6574\u5143\u6570\u636e\uff0c\u50cf\u662f\u7c7b\u540d\u3001\u7ee7\u627f\u7ed3\u6784\u3001\u5b9e\u73b0\u7684\u63a5\u53e3\uff0c\u4ee5\u53ca\u7c7b\u6240\u62e5\u6709\u7684\u5c5e\u6027\u3001\u65b9\u6cd5\u548c\u6784\u9020\u51fd\u6570\u7b49\u5173\u952e\u4fe1\u606f\u3002\u901a\u8fc7Class\u7c7b\uff0c\u53ef\u4ee5\u83b7\u53d6\u5230\u7c7b\u7684\u5404\u79cd\u4fe1\u606f\u3002<\/p>\n\n\n\n<p>\u800cField\u3001Method\u548cConstructor\u7c7b\uff0c\u5219\u662f\u4f9d\u8d56\u4e8eClass\u7c7b\u6765\u83b7\u53d6\u5e76\u5bf9\u7c7b\u7684\u4e0d\u540c\u6210\u5458\u8fdb\u884c\u5177\u4f53\u64cd\u4f5c\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Field<\/strong><strong>\u7c7b<\/strong>\uff1a\u7528\u4e8e\u8868\u793a\u7c7b\u7684\u5c5e\u6027\uff0c\u901a\u8fc7Class\u7c7b\u7684getFields()\uff08\u83b7\u53d6\u516c\u5171\u5c5e\u6027\uff09\u6216getDeclaredFields()\uff08\u83b7\u53d6\u6240\u6709\u5c5e\u6027\uff0c\u5305\u62ec\u79c1\u6709\u5c5e\u6027\uff09\u7b49\u65b9\u6cd5\u83b7\u5f97Field\u5b9e\u4f8b\u540e\uff0c\u4fbf\u80fd\u591f\u83b7\u53d6\u548c\u8bbe\u7f6e\u5c5e\u6027\u7684\u503c\u3002\u4f8b\u5982\uff0c\u4f7f\u7528field.get(obj)\u83b7\u53d6\u5bf9\u8c61obj\u7684\u5c5e\u6027\u503c\uff0cfield.set(obj, value)\u8bbe\u7f6e\u5bf9\u8c61obj\u7684\u5c5e\u6027\u503c\u4e3avalue\u3002<\/li>\n\n\n\n<li><strong>Method<\/strong><strong>\u7c7b<\/strong>\uff1a\u7528\u4e8e\u8868\u793a\u7c7b\u7684\u65b9\u6cd5\uff0c\u501f\u52a9Class\u7c7b\u7684getMethods()\uff08\u83b7\u53d6\u516c\u5171\u65b9\u6cd5\uff09\u6216getDeclaredMethods()\uff08\u83b7\u53d6\u6240\u6709\u65b9\u6cd5\uff0c\u5305\u62ec\u79c1\u6709\u65b9\u6cd5\uff09\u7b49\u65b9\u6cd5\u83b7\u53d6Method\u5b9e\u4f8b\u540e\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7method.invoke(obj, args)\u6765\u8c03\u7528\u65b9\u6cd5\uff0c\u5176\u4e2dobj\u662f\u65b9\u6cd5\u6240\u5c5e\u7684\u5bf9\u8c61\u5b9e\u4f8b\uff0cargs\u662f\u65b9\u6cd5\u53c2\u6570\uff0c\u4ee5\u6b64\u6267\u884c\u76f8\u5e94\u7684\u4e1a\u52a1\u903b\u8f91\u3002<\/li>\n\n\n\n<li><strong>Constructor<\/strong><strong>\u7c7b<\/strong>\uff1a\u7528\u4e8e\u8868\u793a\u7c7b\u7684\u6784\u9020\u51fd\u6570\uff0c\u901a\u8fc7Class\u7c7b\u7684getConstructors()\uff08\u83b7\u53d6\u516c\u5171\u6784\u9020\u51fd\u6570\uff09\u6216getDeclaredConstructors()\uff08\u83b7\u53d6\u6240\u6709\u6784\u9020\u51fd\u6570\uff0c\u5305\u62ec\u79c1\u6709\u6784\u9020\u51fd\u6570\uff09\u7b49\u65b9\u6cd5\u83b7\u53d6Constructor\u5b9e\u4f8b\u540e\uff0c\u80fd\u591f\u4f7f\u7528constructor.newInstance(args)\u6765\u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\uff0cargs\u4e3a\u6784\u9020\u51fd\u6570\u7684\u53c2\u6570\u3002<\/li>\n\n\n\n<li><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u53cd\u5c04\u7684\u539f\u7406<\/h2>\n\n\n\n<p>Java \u53cd\u5c04\u7684\u5b9e\u73b0\u4f9d\u8d56\u4e8e Java \u865a\u62df\u673a\uff08JVM\uff09\u5728\u8fd0\u884c\u65f6\u5bf9\u7c7b\u7684\u52a0\u8f7d\u548c\u7ba1\u7406\u673a\u5236\u3002\u5f53 JVM \u52a0\u8f7d\u4e00\u4e2a\u7c7b\u65f6\uff0c\u4f1a\u5728\u5185\u5b58\u4e2d\u521b\u5efa\u4e00\u4e2aClass\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u5305\u542b\u4e86\u7c7b\u7684\u6240\u6709\u5143\u6570\u636e\u4fe1\u606f\uff0c\u5982\u7c7b\u540d\u3001\u7236\u7c7b\u3001\u63a5\u53e3\u3001\u5c5e\u6027\u3001\u65b9\u6cd5\u7b49\u3002\u53cd\u5c04\u673a\u5236\u5c31\u662f\u901a\u8fc7\u64cd\u4f5c\u8fd9\u4e2aClass\u5bf9\u8c61\u53ca\u5176\u76f8\u5173\u7684Field\u3001Method\u3001Constructor\u7b49\u5bf9\u8c61\u6765\u5b9e\u73b0\u5bf9\u7c7b\u7684\u52a8\u6001\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u83b7\u53d6 Class \u7684\u4e09\u79cd\u65b9\u5f0f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e00\uff09\u901a\u8fc7Class.forName(String className)<\/h3>\n\n\n\n<p>\u8fd9\u662f\u4e00\u79cd\u6700\u5e38\u7528\u7684\u65b9\u5f0f\uff0c\u5b83\u63a5\u6536\u4e00\u4e2a\u7c7b\u7684\u5168\u9650\u5b9a\u540d\uff08\u5305\u540d + \u7c7b\u540d\uff09\u4f5c\u4e3a\u53c2\u6570\uff0c\u8fd4\u56de\u5bf9\u5e94\u7684Class\u5bf9\u8c61\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>try {\n    Class&lt;?> clazz = Class.forName(\"com.example.MyClass\");\n} catch (ClassNotFoundException e) {\n    e.printStackTrace();\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u79cd\u65b9\u5f0f\u7684\u597d\u5904\u662f\u53ef\u4ee5\u6839\u636e\u5b57\u7b26\u4e32\u52a8\u6001\u52a0\u8f7d\u7c7b\uff0c\u5e38\u7528\u4e8e\u9700\u8981\u5728\u8fd0\u884c\u65f6\u6839\u636e\u914d\u7f6e\u6216\u5176\u4ed6\u6761\u4ef6\u51b3\u5b9a\u52a0\u8f7d\u54ea\u4e2a\u7c7b\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e8c\uff09\u901a\u8fc7\u5bf9\u8c61\u7684getClass()\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u5982\u679c\u5df2\u7ecf\u6709\u4e00\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u5176getClass()\u65b9\u6cd5\u6765\u83b7\u53d6\u5bf9\u5e94\u7684Class\u5bf9\u8c61\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>MyClass myObject = new MyClass();\nClass&lt;?> clazz = myObject.getClass();<\/code><\/pre>\n\n\n\n<p>\u8fd9\u79cd\u65b9\u5f0f\u9002\u7528\u4e8e\u5df2\u7ecf\u6709\u5bf9\u8c61\uff0c\u9700\u8981\u83b7\u53d6\u5176\u8fd0\u884c\u65f6\u7c7b\u578b\u4fe1\u606f\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e09\uff09\u901a\u8fc7\u7c7b\u5b57\u9762\u91cfClassName.class<\/h3>\n\n\n\n<p>\u76f4\u63a5\u4f7f\u7528\u7c7b\u7684\u5b57\u9762\u91cf\u5f62\u5f0f\u83b7\u53d6Class\u5bf9\u8c61\uff0c\u8fd9\u79cd\u65b9\u5f0f\u6700\u4e3a\u7b80\u6d01\u76f4\u89c2\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Class&lt;?&gt; clazz = MyClass.class;<\/code><\/pre>\n\n\n\n<p>\u8fd9\u79cd\u65b9\u5f0f\u5728\u7f16\u8bd1\u65f6\u5c31\u786e\u5b9a\u4e86\u7c7b\uff0c\u901a\u5e38\u7528\u4e8e\u5728\u4ee3\u7801\u4e2d\u660e\u786e\u77e5\u9053\u7c7b\u7684\u60c5\u51b5\u4e0b\u83b7\u53d6\u5176Class\u5bf9\u8c61\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u5982\u4f55\u64cd\u4f5c\u7c7b<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ee5\u4e0bgetXXX\uff08\uff09\u65b9\u6cd5\uff0c\u7a7a\u53c2\u5219\u83b7\u5f97\u5bf9\u5e94\u7ed3\u679c\u7684\u6570\u7ec4\uff0c\u6307\u5b9a\u53c2\u6570\uff08\u53c2\u6570\u540d\uff09\u5219\u83b7\u5f97\u5355\u4e2a\u53d8\u91cf\u3002<\/li>\n\n\n\n<li>getDeclaredXXX\uff08\uff09\u65b9\u6cd5\uff0c\u83b7\u53d6\u5230\u7684\u662f\u6240\u6709\u6210\u5458\uff0c\u65e0\u5173\u8bbf\u95ee\u6743\u9650\uff0c\u4e0d\u5e26Deaclared\u5219\u83b7\u53d6\u7684\u662fpublic\u7684\u6210\u5458\u3002\n<ul class=\"wp-block-list\">\n<li>\u5728\u83b7\u53d6\u5230<code>Field<\/code>\u5bf9\u8c61\u540e\uff0c\u9700\u8981\u8c03\u7528<code>field.setAccessible(true)<\/code>\u6765\u6253\u7834\u5c01\u88c5\uff0c\u624d\u5141\u8bb8\u8bbf\u95ee\u79c1\u6709\u6210\u5458\uff0c<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e00\uff09\u83b7\u53d6\u7c7b\u7684\u5c5e\u6027<\/h3>\n\n\n\n<p>\u901a\u8fc7Class\u5bf9\u8c61\u7684getFields()\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u7c7b\u7684\u6240\u6709\u516c\u5171\u5c5e\u6027\uff0c\u8fd4\u56de\u4e00\u4e2aField\u6570\u7ec4\u3002\u5982\u679c\u9700\u8981\u83b7\u53d6\u5305\u62ec\u79c1\u6709\u5c5e\u6027\u5728\u5185\u7684\u6240\u6709\u5c5e\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528getDeclaredFields()\u65b9\u6cd5\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Class&lt;?> clazz = MyClass.class;\nField&#91;] fields = clazz.getFields();\nfor (Field field : fields) {\n    System.out.println(field.getName());\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e8c\uff09\u83b7\u53d6\u7c7b\u7684\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u4f7f\u7528Class\u5bf9\u8c61\u7684getMethods()\u65b9\u6cd5\u83b7\u53d6\u7c7b\u7684\u6240\u6709\u516c\u5171\u65b9\u6cd5\uff0cgetDeclaredMethods()\u65b9\u6cd5\u83b7\u53d6\u6240\u6709\u65b9\u6cd5\uff08\u5305\u62ec\u79c1\u6709\u65b9\u6cd5\uff09\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Class&lt;?> clazz = MyClass.class;\nMethod&#91;] methods = clazz.getMethods();\nfor (Method method : methods) {\n    System.out.println(method.getName());\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e09\uff09\u83b7\u53d6\u7c7b\u7684\u6784\u9020\u51fd\u6570<\/h3>\n\n\n\n<p>\u901a\u8fc7Class\u5bf9\u8c61\u7684getConstructors()\u65b9\u6cd5\u83b7\u53d6\u7c7b\u7684\u6240\u6709\u516c\u5171\u6784\u9020\u51fd\u6570\uff0cgetDeclaredConstructors()\u65b9\u6cd5\u83b7\u53d6\u6240\u6709\u6784\u9020\u51fd\u6570\uff08\u5305\u62ec\u79c1\u6709\u6784\u9020\u51fd\u6570\uff09\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Class&lt;?> clazz = MyClass.class;\nConstructor&lt;?>&#91;] constructors = clazz.getConstructors();\nfor (Constructor&lt;?> constructor : constructors) {\n    System.out.println(constructor.getName());\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u56db\uff09\u83b7\u53d6\u7c7b\u7684\u6ce8\u89e3<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\u83b7\u53d6\u7c7b\u4e0a\u7684\u6240\u6709\u6ce8\u89e3<\/strong>\uff1a\u53ef\u4ee5\u4f7f\u7528Class\u5bf9\u8c61\u7684getAnnotations()\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u7c7b\u4e0a\u6240\u6709\u6ce8\u89e3\u7684\u6570\u7ec4\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.lang.annotation.Annotation;\n\nclass MyClass {\n    \/\/ \u7a7a\u7c7b\uff0c\u4ec5\u7528\u4e8e\u793a\u4f8b\n}\n\npublic class GetClassAnnotations {\n    public static void main(String&#91;] args) {\n        Class&lt;?> clazz = MyClass.class;\n        Annotation&#91;] annotations = clazz.getAnnotations();\n        for (Annotation annotation : annotations) {\n            System.out.println(\"\u7c7b\u4e0a\u7684\u6ce8\u89e3: \" + annotation.annotationType().getName());\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u83b7\u53d6\u7c7b\u4e0a\u7279\u5b9a\u7c7b\u578b\u7684\u6ce8\u89e3<\/strong>\uff1a\u4f7f\u7528Class\u5bf9\u8c61\u7684getAnnotation(Class&lt;T> annotationClass)\u65b9\u6cd5\uff0c\u4f20\u5165\u60f3\u8981\u83b7\u53d6\u7684\u6ce8\u89e3\u7c7b\u578b\u7684Class\u5bf9\u8c61\uff0c\u5373\u53ef\u83b7\u53d6\u8be5\u7c7b\u578b\u7684\u6ce8\u89e3\u3002\u5982\u679c\u7c7b\u4e0a\u4e0d\u5b58\u5728\u8be5\u7c7b\u578b\u7684\u6ce8\u89e3\uff0c\u5219\u8fd4\u56denull\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.lang.annotation.Annotation;\n\n@interface MyAnnotation {\n    String value();\n}\n\n@MyAnnotation(\"\u793a\u4f8b\u503c\")\nclass MyAnnotatedClass {\n    \/\/ \u7a7a\u7c7b\uff0c\u4ec5\u7528\u4e8e\u793a\u4f8b\n}\n\npublic class GetSpecificClassAnnotation {\n    public static void main(String&#91;] args) {\n        Class&lt;?> clazz = MyAnnotatedClass.class;\n        MyAnnotation myAnnotation = clazz.getAnnotation(MyAnnotation.class);\n        if (myAnnotation!= null) {\n            System.out.println(\"\u83b7\u53d6\u5230\u7684\u7279\u5b9a\u6ce8\u89e3\u7684\u503c: \" + myAnnotation.value());\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u5982\u4f55\u64cd\u4f5c\u5bf9\u8c61<\/h2>\n\n\n\n<p>\u6ce8\uff1a\u6b64\u5904\u7684\u5bf9\u8c61\u4e5f\u53ef\u4ee5\u662f\u4ece\u5916\u90e8\u83b7\u53d6\u7684\uff0c\u800c\u5e76\u4e0d\u662f\u53ea\u6709\u4ee5\u4e0b\u793a\u4f8b\u4e2d\u901a\u8fc7\u7c7b\u7684\u53cd\u5c04\u7684\u6784\u9020\u5668\u65b0\u521b\u5efa\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e00\uff09\u521b\u5efa\u5bf9\u8c61<\/h3>\n\n\n\n<p>\u901a\u8fc7Constructor\u5bf9\u8c61\u7684newInstance()\u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\u3002\u5982\u679c\u7c7b\u6709\u591a\u4e2a\u6784\u9020\u51fd\u6570\uff0c\u53ef\u4ee5\u6839\u636e\u53c2\u6570\u7c7b\u578b\u9009\u62e9\u5408\u9002\u7684\u6784\u9020\u51fd\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Class&lt;?> clazz = MyClass.class;\nConstructor&lt;?> constructor = clazz.getConstructor();\nObject instance = constructor.newInstance();<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e8c\uff09\u8bbf\u95ee\u548c\u4fee\u6539\u5bf9\u8c61\u7684\u5c5e\u6027<\/h3>\n\n\n\n<p>\u83b7\u53d6Field\u5bf9\u8c61\u540e\uff0c\u901a\u8fc7field.get(Object obj)\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u5bf9\u8c61\u7684\u5c5e\u6027\u503c\uff0cfield.set(Object obj, Object value)\u65b9\u6cd5\u53ef\u4ee5\u8bbe\u7f6e\u5bf9\u8c61\u7684\u5c5e\u6027\u503c\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u5c5e\u6027\u662f\u79c1\u6709\u7684\uff0c\u9700\u8981\u5148\u8c03\u7528field.setAccessible(true)\u6765\u6253\u7834\u5c01\u88c5\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Class&lt;?> clazz = MyClass.class;\nObject instance = clazz.getConstructor().newInstance();\nField field = clazz.getDeclaredField(\"privateField\");\nfield.setAccessible(true);\nfield.set(instance, \"new value\");\nObject value = field.get(instance);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\uff08\u4e09\uff09\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u83b7\u53d6Method\u5bf9\u8c61\u540e\uff0c\u901a\u8fc7method.invoke(Object obj, Object&#8230; args)\u65b9\u6cd5\u53ef\u4ee5\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0c\u5176\u4e2dargs\u662f\u65b9\u6cd5\u7684\u53c2\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Class&lt;?> clazz = MyClass.class;\nObject instance = clazz.getConstructor().newInstance();\nMethod method = clazz.getMethod(\"myMethod\", String.class);\nmethod.invoke(instance, \"parameter\");\n\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u5177\u4f53\u5b9e\u8df5\uff1a<a href=\"http:\/\/www.cmd137blog.top\/?p=635\">\u82cd\u7a79\u5916\u5356\u7b14\u8bb0 \u2013 CMD137&#8217;s Blog<\/a> \u89c1\u516c\u5171\u5b57\u6bb5\u81ea\u52a8\u586b\u5145<\/h2>\n","protected":false},"excerpt":{"rendered":"<p>\u53cd\u5c04\u7684\u771f\u6b63\u4ef7\u503c\u5728\u4e8e\u5904\u7406\u7f16\u8bd1\u65f6\u672a\u77e5\u7684\u7c7b\u578b\uff0c\u4ece\u800c\u7f16\u5199\u66f4\u901a\u7528\u5316\u7684\u4ee3\u7801\u3002 \u4e00\u3001\u53cd\u5c04\u57fa\u7840\u6982\u5ff5 \uff08\u4e00\uff09\u4ec0\u4e48\u662f\u53cd\u5c04 \u53cd\u5c04\u662f  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[56],"tags":[25],"class_list":["post-674","post","type-post","status-publish","format-standard","hentry","category-java","tag-java"],"_links":{"self":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/674","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=674"}],"version-history":[{"count":1,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/674\/revisions"}],"predecessor-version":[{"id":676,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/674\/revisions\/676"}],"wp:attachment":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=674"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=674"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=674"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}