{"id":202706,"date":"2025-05-22T11:21:29","date_gmt":"2025-05-22T03:21:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202706\/"},"modified":"2025-05-22T11:21:29","modified_gmt":"2025-05-22T03:21:29","slug":"java-%e5%87%bd%e6%95%b0%e5%92%8c%e6%96%b9%e6%b3%95%e6%98%af%e5%90%a6%e5%8f%af%e4%bb%a5%e9%80%9a%e8%bf%87%e5%8f%8d%e5%b0%84%e8%bf%9b%e8%a1%8c%e8%b0%83%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202706\/","title":{"rendered":"Java \u51fd\u6570\u548c\u65b9\u6cd5\u662f\u5426\u53ef\u4ee5\u901a\u8fc7\u53cd\u5c04\u8fdb\u884c\u8c03\u7528\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Java \u51fd\u6570\u548c\u65b9\u6cd5\u662f\u5426\u53ef\u4ee5\u901a\u8fc7\u53cd\u5c04\u8fdb\u884c\u8c03\u7528\uff1f<\/h1>\n

\u54c8\u55bd\uff01\u5927\u5bb6\u597d\uff0c\u5f88\u9ad8\u5174\u53c8\u89c1\u9762\u4e86\uff0c\u6211\u662f\u7684\u4e00\u540d\u4f5c\u8005\uff0c\u4eca\u5929\u7531\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\u300aJava \u51fd\u6570\u548c\u65b9\u6cd5\u662f\u5426\u53ef\u4ee5\u901a\u8fc7\u53cd\u5c04\u8fdb\u884c\u8c03\u7528\uff1f\u300b<\/span>\uff0c\u672c\u6587\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5927\u5bb6\u4e00\u8d77\u5b66\u4e60\u8fdb\u6b65\uff0c\u4e5f\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u3001\u70b9\u8d5e\u3001\u6536\u85cf\u3001\u8f6c\u53d1! \u4e0b\u9762\u5c31\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n

Java \u53cd\u5c04\u4f7f\u6211\u4eec\u80fd\u591f\u5728\u8fd0\u884c\u65f6\u8c03\u7528\u51fd\u6570\u548c\u65b9\u6cd5\uff1a\u8c03\u7528\u51fd\u6570\uff1a\u4f7f\u7528 Class.getDeclaredMethod() \u83b7\u53d6\u51fd\u6570\u7684 Method \u5bf9\u8c61\uff0c\u8bbe\u7f6e\u53ef\u8bbf\u95ee\u6027\uff08\u5982\u679c\u9700\u8981\uff09\uff0c\u521b\u5efa\u7c7b\u5b9e\u4f8b\uff0c\u8c03\u7528\u51fd\u6570\u3002\u8c03\u7528\u65b9\u6cd5\uff1a\u4e0e\u8c03\u7528\u51fd\u6570\u7c7b\u4f3c\uff0c\u83b7\u53d6\u65b9\u6cd5\u7684 Method \u5bf9\u8c61\uff0c\u8bbe\u7f6e\u53ef\u8bbf\u95ee\u6027\uff08\u5982\u679c\u9700\u8981\uff09\uff0c\u521b\u5efa\u7c7b\u5b9e\u4f8b\uff0c\u4f20\u9012\u53c2\u6570\u5e76\u8c03\u7528\u65b9\u6cd5\u3002<\/p>\n

<\/p>\n

Java \u53cd\u5c04\u8c03\u7528\u51fd\u6570\u548c\u65b9\u6cd5<\/strong><\/p>\n

\u7b80\u4ecb<\/strong><\/p>\n

Java \u53cd\u5c04\u63d0\u4f9b\u4e86\u5728\u8fd0\u884c\u65f6\u68c0\u67e5\u548c\u4fee\u6539\u7c7b\u53ca\u5176\u6210\u5458\u7684\u5f3a\u5927\u529f\u80fd\u3002\u901a\u8fc7\u53cd\u5c04\uff0c\u6211\u4eec\u4e0d\u4ec5\u53ef\u4ee5\u8bbf\u95ee\u79c1\u6709\u5b57\u6bb5\uff0c\u8fd8\u53ef\u4ee5\u8c03\u7528\u51fd\u6570\u548c\u65b9\u6cd5\u3002<\/p>\n

\u8c03\u7528\u51fd\u6570<\/strong><\/p>\n

\u8981\u8c03\u7528\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

import java.lang.reflect.Method;\n\npublic class FunctionReflection {\n\n    public static void main(String[] args) {\n        try {\n            \/\/ \u83b7\u53d6\u51fd\u6570\u7684 Method \u5bf9\u8c61\n            Class<?> clazz = Class.forName(\"myExamplePackage.MyExampleClass\");\n            Method function = clazz.getDeclaredMethod(\"myFunction\");\n\n            \/\/ \u8bbe\u7f6e\u65b9\u6cd5\u53ef\u8bbf\u95ee\u6027\uff08\u5982\u679c\u9700\u8981\uff09\n            function.setAccessible(true);\n\n            \/\/ \u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\n            Object instance = clazz.newInstance();\n\n            \/\/ \u8c03\u7528\u51fd\u6570\n            String result = (String) function.invoke(instance);\n\n            System.out.println(\"Function result: \" + result);\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}<\/pre>\n
\u8c03\u7528\u65b9\u6cd5<\/strong><\/p>\n
\u8981\u8c03\u7528\u65b9\u6cd5\uff0c\u6b65\u9aa4\u7c7b\u4f3c\uff1a<\/p>\n
import java.lang.reflect.Method;\n\npublic class MethodReflection {\n\n    public static void main(String[] args) {\n        try {\n            \/\/ \u83b7\u53d6\u65b9\u6cd5\u7684 Method \u5bf9\u8c61\n            Class<?> clazz = Class.forName(\"myExamplePackage.MyExampleClass\");\n            Method method = clazz.getDeclaredMethod(\"myMethod\", int.class, String.class);\n\n            \/\/ \u8bbe\u7f6e\u65b9\u6cd5\u53ef\u8bbf\u95ee\u6027\uff08\u5982\u679c\u9700\u8981\uff09\n            method.setAccessible(true);\n\n            \/\/ \u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\n            Object instance = clazz.newInstance();\n\n            \/\/ \u8c03\u7528\u65b9\u6cd5\uff0c\u4f20\u9012\u53c2\u6570\n            Integer result = (Integer) method.invoke(instance, 10, \"Hello\");\n\n            System.out.println(\"Method result: \" + result);\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b\uff0c\u5b83\u4f7f\u7528\u53cd\u5c04\u8c03\u7528 java.util.Arrays<\/code> \u7c7b\u4e2d\u7684 toString<\/code> \u65b9\u6cd5\uff1a<\/p>\n
import java.lang.reflect.InvocationTargetException;\nimport java.lang.reflect.Method;\nimport java.util.Arrays;\n\npublic class ArrayToStringReflection {\n\n    public static void main(String[] args) {\n        try {\n            \/\/ \u83b7\u53d6\u65b9\u6cd5\u7684 Method \u5bf9\u8c61\n            Method toString = Arrays.class.getDeclaredMethod(\"toString\", Object[].class);\n\n            \/\/ \u8bbe\u7f6e\u65b9\u6cd5\u53ef\u8bbf\u95ee\u6027\n            toString.setAccessible(true);\n\n            \/\/ \u521b\u5efa\u53c2\u6570\n            Object[] array = {1, 2, 3, 4, 5};\n\n            \/\/ \u8c03\u7528\u65b9\u6cd5\n            String result = (String) toString.invoke(null, array);\n\n            System.out.println(\"Array to string: \" + result);\n        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {\n            e.printStackTrace();\n        }\n    }\n}<\/pre>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Java \u51fd\u6570\u548c\u65b9\u6cd5\u662f\u5426\u53ef\u4ee5\u901a\u8fc7...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-202706","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202706"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202706\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}