{"id":46994,"date":"2024-12-02T11:21:11","date_gmt":"2024-12-02T03:21:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/46994\/"},"modified":"2024-12-02T11:21:11","modified_gmt":"2024-12-02T03:21:11","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%8f%8d%e5%b0%84%e6%8f%90%e5%8d%87%e5%87%bd%e6%95%b0%e5%8f%af%e5%a4%8d%e7%94%a8%e6%80%a7%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/46994\/","title":{"rendered":"\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u53cd\u5c04\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u53cd\u5c04\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027\uff1f<\/h1>\n

\u5b66\u4e60\u77e5\u8bc6\u8981\u5584\u4e8e\u601d\u8003\uff0c\u601d\u8003\uff0c\u518d\u601d\u8003\uff01\u4eca\u5929\u7c73\u4e91\u5c0f\u7f16\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u53cd\u5c04\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027\uff1f\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u5305\u542b<\/span>\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6216\u51c6\u5907\u5b66\u4e60\u6587\u7ae0<\/span>\uff0c\u5c31\u90fd\u4e0d\u8981\u9519\u8fc7\u672c\u6587\u5566~\u8ba9\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff0c\u80fd\u5e2e\u52a9\u5230\u4f60\u5c31\u66f4\u597d\u4e86\uff01<\/span><\/p>\n

\"\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u53cd\u5c04\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027\uff1f\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528\u53cd\u5c04\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027<\/strong><\/p>\n

\u5f15\u8a00<\/strong><\/p>\n

\u53cd\u5c04\u673a\u5236\u662f Java \u4e2d\u4e00\u79cd\u5f3a\u5927\u7684\u529f\u80fd\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u4ee5\u8fd0\u884c\u65f6\u65b9\u5f0f\u83b7\u53d6\u548c\u64cd\u4f5c\u7c7b\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\u548c\u5176\u4ed6 Java \u8bed\u8a00\u5143\u7d20\u7684\u5143\u6570\u636e\u3002\u901a\u8fc7\u5229\u7528\u53cd\u5c04\uff0c\u6211\u4eec\u53ef\u4ee5\u63d0\u9ad8\u51fd\u6570\u7684\u53ef\u590d\u7528\u6027\uff0c\u4ece\u800c\u5728\u5404\u79cd\u60c5\u51b5\u4e0b\u4f7f\u7528\u5b83\u4eec\u3002<\/p>\n

\u4f7f\u7528 Java \u53cd\u5c04\u83b7\u53d6\u7c7b\u578b\u4fe1\u606f<\/strong><\/p>\n

\u8981\u4f7f\u7528\u53cd\u5c04\uff0c\u7b2c\u4e00\u6b65\u662f\u83b7\u53d6\u6211\u4eec\u8981\u64cd\u4f5c\u7c7b\u7684\u7c7b\u578b\u4fe1\u606f\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Class.forName()<\/code> \u65b9\u6cd5\u6765\u5b9e\u73b0\uff1a<\/p>\n

Class<?> myClass = Class.forName(\"com.example.MyClass\");<\/pre>\n
\u8fd9\u5c06\u4e3a\u7ed9\u5b9a\u7c7b\u540d\u8fd4\u56de\u4e00\u4e2a Class<\/code> \u5bf9\u8c61\uff0c\u5b83\u5305\u542b\u6709\u5173\u8be5\u7c7b\u7684\u5143\u6570\u636e\u3002<\/p>\n
\u4f7f\u7528\u53cd\u5c04\u8c03\u7528\u65b9\u6cd5<\/strong><\/p>\n
\u4e00\u65e6\u6211\u4eec\u6709\u4e86 Class<\/code> \u5bf9\u8c61\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u83b7\u53d6\u548c\u8c03\u7528\u7c7b\u7684\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u53cd\u5c04\u8c03\u7528\u65b9\u6cd5\u7684\u65b9\u5f0f\uff1a<\/p>\n
Method myMethod = myClass.getMethod(\"myMethod\", String.class, int.class);\nObject result = myMethod.invoke(instance, \"Hello\", 10);<\/pre>\n
\u5728\u8fd9\u91cc\uff0cmyMethod<\/code> \u53d8\u91cf\u5305\u542b\u6211\u4eec\u8981\u8c03\u7528\u7684\u65b9\u6cd5\u7684\u5143\u6570\u636e\uff0cinstance<\/code> \u662f\u6211\u4eec\u60f3\u5bf9\u5176\u8c03\u7528\u65b9\u6cd5\u7684\u5bf9\u8c61\uff0c\u800c result<\/code> \u53d8\u91cf\u5305\u542b\u4e86\u65b9\u6cd5\u8fd4\u56de\u7684\u7ed3\u679c\u3002<\/p>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8ba9\u6211\u4eec\u8003\u8651\u4e00\u4e2a\u5b9e\u9645\u4f8b\u5b50\uff0c\u5176\u4e2d\u6211\u4eec\u9700\u8981\u4f7f\u7528\u53cd\u5c04\u6765\u7f16\u5199\u4e00\u4e2a\u901a\u7528\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6253\u5370\u4efb\u4f55\u5bf9\u8c61\u7684\u4fe1\u606f\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Class.getDeclaredFields()<\/code> \u65b9\u6cd5\u6765\u83b7\u53d6\u7c7b\u7684\u6240\u6709\u58f0\u660e\u5b57\u6bb5\uff0c\u7136\u540e\u9488\u5bf9\u6bcf\u4e2a\u5b57\u6bb5\u8c03\u7528 Method.invoke()<\/code>\uff1a<\/p>\n
public static void printObjectInfo(Object obj) {\n    Class<?> myClass = obj.getClass();\n    for (Field field : myClass.getDeclaredFields()) {\n        field.setAccessible(true);\n        System.out.println(field.getName() + \": \" + field.get(obj));\n    }\n}<\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8be5\u65b9\u6cd5\u4ee5\u901a\u7528\u65b9\u5f0f\u6253\u5370\u4efb\u4f55\u5bf9\u8c61\u7684\u4fe1\u606f\uff1a<\/p>\n
printObjectInfo(new Person(\"John\", 30));\n\/\/ \u8f93\u51fa\uff1a\n\/\/ name: John\n\/\/ age: 30<\/pre>\n
\u7ed3\u675f<\/strong><\/p>\n
\u901a\u8fc7\u5229\u7528 Java \u53cd\u5c04\uff0c\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u9ad8\u5ea6\u53ef\u590d\u7528\u7684\u51fd\u6570\uff0c\u5b83\u4eec\u53ef\u4ee5\u9002\u5e94\u4e0d\u540c\u7684\u8f93\u5165\u548c\u4e0a\u4e0b\u6587\u7684\u52a8\u6001\u53d8\u5316\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u53cd\u5c04\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u53cd\u5c04,\u51fd\u6570\u590d\u7528\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u53cd\u5c04\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027\uff1f \u5b66\u4e60\u77e5\u8bc6\u8981\u5584\u4e8e\u601d\u8003\uff0c\u601d\u8003\uff0c\u518d\u601d\u8003\uff01\u4eca\u5929\u7c73\u4e91\u5c0f\u7f16\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u53cd\u5c04\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027\uff1f\u300b\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u5305\u542b\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6216\u51c6\u5907\u5b66\u4e60\u6587\u7ae0\uff0c\u5c31\u90fd\u4e0d\u8981\u9519\u8fc7\u672c\u6587\u5566~\u8ba9\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff0c\u80fd\u5e2e\u52a9\u5230\u4f60\u5c31\u66f4\u597d\u4e86\uff01 \u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528\u53cd\u5c04\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027 \u5f15\u8a00 \u53cd\u5c04\u673a\u5236\u662f Java \u4e2d\u4e00\u79cd\u5f3a\u5927\u7684\u529f\u80fd\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u4ee5\u8fd0\u884c\u65f6\u65b9\u5f0f\u83b7\u53d6\u548c\u64cd\u4f5c\u7c7b\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\u548c\u5176\u4ed6 Java \u8bed\u8a00\u5143\u7d20\u7684\u5143\u6570\u636e\u3002\u901a\u8fc7\u5229\u7528\u53cd\u5c04\uff0c\u6211\u4eec\u53ef\u4ee5\u63d0\u9ad8\u51fd\u6570\u7684\u53ef\u590d\u7528\u6027\uff0c\u4ece\u800c\u5728\u5404\u79cd\u60c5\u51b5\u4e0b\u4f7f\u7528\u5b83\u4eec\u3002 \u4f7f\u7528 Java \u53cd\u5c04\u83b7\u53d6\u7c7b\u578b\u4fe1\u606f \u8981\u4f7f\u7528\u53cd\u5c04\uff0c\u7b2c\u4e00\u6b65\u662f\u83b7\u53d6\u6211\u4eec\u8981\u64cd\u4f5c\u7c7b\u7684\u7c7b\u578b\u4fe1\u606f\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Class.forName() \u65b9\u6cd5\u6765\u5b9e\u73b0\uff1a Class<?> myClass = Class.forName(“com.example.MyClass”); \u8fd9\u5c06\u4e3a\u7ed9\u5b9a\u7c7b\u540d\u8fd4\u56de\u4e00\u4e2a Class \u5bf9\u8c61\uff0c\u5b83\u5305\u542b\u6709\u5173\u8be5\u7c7b\u7684\u5143\u6570\u636e\u3002 \u4f7f\u7528\u53cd\u5c04\u8c03\u7528\u65b9\u6cd5 \u4e00\u65e6\u6211\u4eec\u6709\u4e86 Class \u5bf9\u8c61\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u83b7\u53d6\u548c\u8c03\u7528\u7c7b\u7684\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u53cd\u5c04\u8c03\u7528\u65b9\u6cd5\u7684\u65b9\u5f0f\uff1a Method myMethod = myClass.getMethod(“myMethod”, String.class, int.class); Object result = myMethod.invoke(instance, “Hello”, 10); \u5728\u8fd9\u91cc\uff0cmyMethod \u53d8\u91cf\u5305\u542b\u6211\u4eec\u8981\u8c03\u7528\u7684\u65b9\u6cd5\u7684\u5143\u6570\u636e\uff0cinstance \u662f\u6211\u4eec\u60f3\u5bf9\u5176\u8c03\u7528\u65b9\u6cd5\u7684\u5bf9\u8c61\uff0c\u800c result \u53d8\u91cf\u5305\u542b\u4e86\u65b9\u6cd5\u8fd4\u56de\u7684\u7ed3\u679c\u3002 \u5b9e\u6218\u6848\u4f8b \u8ba9\u6211\u4eec\u8003\u8651\u4e00\u4e2a\u5b9e\u9645\u4f8b\u5b50\uff0c\u5176\u4e2d\u6211\u4eec\u9700\u8981\u4f7f\u7528\u53cd\u5c04\u6765\u7f16\u5199\u4e00\u4e2a\u901a\u7528\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6253\u5370\u4efb\u4f55\u5bf9\u8c61\u7684\u4fe1\u606f\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Class.getDeclaredFields() \u65b9\u6cd5\u6765\u83b7\u53d6\u7c7b\u7684\u6240\u6709\u58f0\u660e\u5b57\u6bb5\uff0c\u7136\u540e\u9488\u5bf9\u6bcf\u4e2a\u5b57\u6bb5\u8c03\u7528 Method.invoke()\uff1a public static void printObjectInfo(Object obj) […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-46994","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46994","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=46994"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46994\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=46994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=46994"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=46994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}