{"id":31284,"date":"2023-04-06T03:48:07","date_gmt":"2024-02-27T07:36:02","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java-%e7%9a%84%e5%8f%8d%e5%b0%84%e5%8f%af%e4%bb%a5%e5%81%9a%e7%9a%84%e4%ba%8b%e6%83%85%e3%80%82\/"},"modified":"2025-08-12T23:14:31","modified_gmt":"2025-08-12T15:14:31","slug":"java-%e7%9a%84%e5%8f%8d%e5%b0%84%e5%8f%af%e4%bb%a5%e5%81%9a%e7%9a%84%e4%ba%8b%e6%83%85%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java-%e7%9a%84%e5%8f%8d%e5%b0%84%e5%8f%af%e4%bb%a5%e5%81%9a%e7%9a%84%e4%ba%8b%e6%83%85%e3%80%82\/","title":{"rendered":"Java \u7684\u53cd\u5c04\u53ef\u4ee5\u505a\u7684\u4e8b\u60c5"},"content":{"rendered":"<h1>\u53cd\u5c04\uff08reflection\uff09\u5728Java\u4e2d\u7684\u5e94\u7528<\/h1>\n<p>Java\u7684\u53cd\u5c04\u662f\u6307\u5728\u8fd0\u884c\u65f6\u83b7\u53d6\u548c\u6267\u884c\u7c7b\u3001\u65b9\u6cd5\u7b49\u4fe1\u606f\u7684\u529f\u80fd\u3002<\/p>\n<h2>\u4f7f\u7528\u53cd\u601d\u7684\u597d\u5904<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528\u53cd\u601d\u6765\u83b7\u5f97\u4ee5\u4e0b\u597d\u5904\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3057\u305f\u308a\u3001\u5b9f\u884c\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u5b9f\u884c\u6642\u306b\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u52d5\u7684\u306b\u64cd\u4f5c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u5185\u90e8\u69cb\u9020\u3092\u76f4\u63a5\u64cd\u4f5c\u3059\u308b\u305f\u3081\u3001\u67d4\u8edf\u306a\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u5185\u90e8\u69cb\u9020\u3092\u89e3\u6790\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/ul>\n<h2>\u4f7f\u7528\u53cd\u5c04\u65f6\u9700\u8981\u6ce8\u610f\u7684\u8981\u70b9<\/h2>\n<p>\u5728\u4f7f\u7528\u53cd\u601d\u65f6\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u306f\u3001\u5b9f\u884c\u6642\u306b\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u60c5\u5831\u3092\u5f97\u308b\u305f\u3081\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u306f\u3001\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u5185\u90e8\u69cb\u9020\u3092\u76f4\u63a5\u64cd\u4f5c\u3059\u308b\u305f\u3081\u3001\u4e0d\u6b63\u306a\u64cd\u4f5c\u3092\u884c\u3046\u3068\u3001\u4e88\u671f\u3057\u306a\u3044\u7d50\u679c\u3092\u62db\u304f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/ul>\n<h2>\u4f7f\u7528\u53cd\u601d\u7684\u5178\u578b\u4f8b\u5b50<\/h2>\n<p>\u53cd\u601d\u53ef\u4ee5\u7528\u4e8e\u4ee5\u4e0b\u7528\u9014\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u5185\u90e8\u69cb\u9020\u3092\u89e3\u6790\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30e9\u30f3\u30bf\u30a4\u30e0\u6642\u306b\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u62e1\u5f35\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30d7\u30ed\u30ad\u30b7\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u73fe\u3059\u308b<\/ul>\n<h2>\u8bd5\u7740\u4eb2\u8eab\u4f7f\u7528\u53cd\u601d<\/h2>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u83b7\u53d6\u4e86\u4e00\u4e2a\u540d\u4e3acom.example.MyClass\u7684\u7c7b\uff0c\u5e76\u663e\u793a\u4e86\u8be5\u7c7b\u7684\u4fe1\u606f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u30af\u30e9\u30b9\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n<span class=\"nc\">Class<\/span><span class=\"o\">&lt;?&gt;<\/span> <span class=\"n\">clazz<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Class<\/span><span class=\"o\">.<\/span><span class=\"na\">forName<\/span><span class=\"o\">(<\/span><span class=\"s\">\"com.example.MyClass\"<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u30af\u30e9\u30b9\u306e\u540d\u524d\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">clazz<\/span><span class=\"o\">.<\/span><span class=\"na\">getName<\/span><span class=\"o\">());<\/span> <span class=\"c1\">\/\/ com.example.MyClass<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n<span class=\"nc\">Method<\/span><span class=\"o\">[]<\/span> <span class=\"n\">methods<\/span> <span class=\"o\">=<\/span> <span class=\"n\">clazz<\/span><span class=\"o\">.<\/span><span class=\"na\">getMethods<\/span><span class=\"o\">();<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u30e1\u30bd\u30c3\u30c9\u306e\u540d\u524d\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n<span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Method<\/span> <span class=\"n\">method<\/span> <span class=\"o\">:<\/span> <span class=\"n\">methods<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">method<\/span><span class=\"o\">.<\/span><span class=\"na\">getName<\/span><span class=\"o\">());<\/span>\r\n<span class=\"o\">}<\/span> <span class=\"c1\">\/\/ sayHello, getAge<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3059\u308b<\/span>\r\n<span class=\"nc\">Object<\/span> <span class=\"n\">instance<\/span> <span class=\"o\">=<\/span> <span class=\"n\">clazz<\/span><span class=\"o\">.<\/span><span class=\"na\">newInstance<\/span><span class=\"o\">();<\/span>\r\n<span class=\"nc\">Method<\/span> <span class=\"n\">sayHelloMethod<\/span> <span class=\"o\">=<\/span> <span class=\"n\">clazz<\/span><span class=\"o\">.<\/span><span class=\"na\">getMethod<\/span><span class=\"o\">(<\/span><span class=\"s\">\"sayHello\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"n\">sayHelloMethod<\/span><span class=\"o\">.<\/span><span class=\"na\">invoke<\/span><span class=\"o\">(<\/span><span class=\"n\">instance<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ Hello!<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n<span class=\"nc\">Field<\/span> <span class=\"n\">ageField<\/span> <span class=\"o\">=<\/span> <span class=\"n\">clazz<\/span><span class=\"o\">.<\/span><span class=\"na\">getField<\/span><span class=\"o\">(<\/span><span class=\"s\">\"age\"<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n<span class=\"nc\">Object<\/span> <span class=\"n\">age<\/span> <span class=\"o\">=<\/span> <span class=\"n\">ageField<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"n\">instance<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">age<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ 20<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u8a2d\u5b9a<\/span>\r\n<span class=\"n\">ageField<\/span><span class=\"o\">.<\/span><span class=\"na\">set<\/span><span class=\"o\">(<\/span><span class=\"n\">instance<\/span><span class=\"o\">,<\/span> <span class=\"mi\">30<\/span><span class=\"o\">);<\/span>\r\n<span class=\"n\">age<\/span> <span class=\"o\">=<\/span> <span class=\"n\">ageField<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"n\">instance<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">age<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ 30<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u6267\u884c\u4e86\u4ee5\u4e0b\u5904\u7406\u3002<\/p>\n<p>Class.forName() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001com.example.MyClass \u3068\u3044\u3046\u30af\u30e9\u30b9\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<p>clazz.getName() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30af\u30e9\u30b9\u306e\u540d\u524d\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<p>clazz.getMethods() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30af\u30e9\u30b9\u306e\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<p>method.getName() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u540d\u524d\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<p>clazz.newInstance() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<p>clazz.getMethod() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<p>method.invoke() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p>clazz.getField() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<p>ageField.get() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<p>ageField.set() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u6267\u884c\u6b64\u4ee3\u7801\u5c06\u5f97\u5230\u4ee5\u4e0b\u8f93\u51fa\u7ed3\u679c\u3002<\/p>\n<pre class=\"post-pre\"><code>com.example.MyClass\r\nsayHello, getAge\r\nHello!\r\n20\r\n30\r\n<\/code><\/pre>\n<p>\u8fd8\u6709\u5176\u4ed6\u7684\u83b7\u53d6\u4fee\u9970\u5668\u76f8\u5173\u5904\u7406\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<p>Modifier.isPrivate(field.getModifiers()) \u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304cprivate\u304b\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<p>Modifier.isPrivate(method.getModifiers()) \u305d\u306e\u30e1\u30bd\u30c3\u30c9\u304cprivate\u304b\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<h2>\u638c\u63e1\u4f7f\u7528\u53cd\u601d\u7684\u8981\u70b9<\/h2>\n<p>\u8981\u719f\u7ec3\u638c\u63e1\u4f7f\u7528\u53cd\u601d\u7684\u6280\u5de7\uff0c\u5efa\u8bae\u8bb0\u4f4f\u4ee5\u4e0b\u8981\u70b9\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u3069\u306e\u3088\u3046\u306a\u6a5f\u80fd\u306a\u306e\u304b\u3092\u7406\u89e3\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u5229\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3092\u7406\u89e3\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u5b9f\u969b\u306b\u4f7f\u3063\u3066\u307f\u308b\u3002<\/ul>\n<p>\u53cd\u5c04\u662fJava\u7684\u9ad8\u7ea7\u529f\u80fd\uff0c\u4f46\u5982\u679c\u80fd\u591f\u719f\u7ec3\u8fd0\u7528\uff0c\u5c06\u975e\u5e38\u65b9\u4fbf\u3002\u8ba9\u6211\u4eec\u4e00\u5b9a\u8981\u719f\u7ec3\u638c\u63e1\u53cd\u5c04\uff0c\u4f7fJava\u7f16\u7a0b\u66f4\u52a0\u6709\u8da3\u3001\u66f4\u52a0\u4fbf\u5229\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53cd\u5c04\uff08reflection\uff09\u5728Java\u4e2d\u7684\u5e94\u7528 Java\u7684\u53cd\u5c04\u662f\u6307\u5728\u8fd0\u884c\u65f6\u83b7\u53d6\u548c\u6267\u884c\u7c7b\u3001\u65b9\u6cd5\u7b49\u4fe1\u606f\u7684\u529f\u80fd\u3002 \u4f7f [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31284","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java \u7684\u53cd\u5c04\u53ef\u4ee5\u505a\u7684\u4e8b\u60c5 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8eJava \u7684\u53cd\u5c04\u53ef\u4ee5\u505a\u7684\u4e8b\u60c5\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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