{"id":203705,"date":"2025-05-22T12:38:22","date_gmt":"2025-05-22T04:38:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203705\/"},"modified":"2025-05-22T12:38:22","modified_gmt":"2025-05-22T04:38:22","slug":"spring-%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e4%b8%ad%e4%bd%bf%e7%94%a8-bean-%e5%8f%8d%e5%b0%84%e8%8e%b7%e5%8f%96%e4%b8%8d%e5%88%b0%e5%b1%9e%e6%80%a7%e7%9a%84%e5%8e%9f%e5%9b%a0%e6%98%af%e4%bb%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203705\/","title":{"rendered":"Spring \u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528 Bean \u53cd\u5c04\u83b7\u53d6\u4e0d\u5230\u5c5e\u6027\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Spring \u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528 Bean \u53cd\u5c04\u83b7\u53d6\u4e0d\u5230\u5c5e\u6027\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h1>\n<p>\u4f60\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aSpring \u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528 Bean \u53cd\u5c04\u83b7\u53d6\u4e0d\u5230\u5c5e\u6027\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241118\/1731926201673b18b9d443a.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>bean\u53cd\u5c04\u540e\u62ff\u4e0d\u5230\u5c5e\u6027\u7684\u539f\u56e0<\/strong><\/p>\n<p>\u5728spring\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u4f7f\u7528applicationcontext.getbean(cls)\u83b7\u53d6bean\u5e76\u8fdb\u884c\u53cd\u5c04\u65f6\uff0c\u6709\u65f6\u53ef\u80fd\u65e0\u6cd5\u901a\u8fc7getdeclaredfields()\u65b9\u6cd5\u83b7\u53d6\u8be5\u7c7b\u7684\u5c5e\u6027\u3002\u8fd9\u662f\u56e0\u4e3a\uff1a<\/p>\n<p>\u4f60\u6240\u83b7\u53d6\u7684bean\u53ef\u80fd\u662f\u4e00\u4e2a\u4ee3\u7406\u5bf9\u8c61\u3002\u4ee3\u7406\u5bf9\u8c61\u662f\u7531spring\u7684\u4f9d\u8d56\u6ce8\u5165\u6846\u67b6\u521b\u5efa\u7684\uff0c\u7528\u4e8e\u62e6\u622a\u5bf9\u76ee\u6807bean\u7684\u65b9\u6cd5\u8c03\u7528\u5e76\u589e\u5f3a\u5176\u884c\u4e3a\u3002\u4ee3\u7406\u5bf9\u8c61\u672c\u8eab\u4e0d\u5305\u542b\u76ee\u6807bean\u7684\u5b9e\u9645\u5c5e\u6027\uff0c\u56e0\u6b64getdeclaredfields()\u65b9\u6cd5\u65e0\u6cd5\u8fd4\u56de\u8fd9\u4e9b\u5c5e\u6027\u3002<\/p>\n<p>\u8981\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u9700\u8981\u83b7\u53d6\u76ee\u6807bean\u800c\u4e0d\u662f\u4ee3\u7406\u5bf9\u8c61\u3002\u53ef\u4ee5\u4f7f\u7528getbeandefinition().getbeanclassname()\u65b9\u6cd5\u83b7\u53d6\u76ee\u6807bean\u7684\u540d\u79f0\uff0c\u7136\u540e\u4f7f\u7528\u53cd\u5c04api\u76f4\u63a5\u83b7\u53d6\u8be5\u7c7b\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>String className = applicationContext.getBeanDefinition(cls).getBeanClassName();\nClass&lt;?&gt; targetClass = Class.forName(className);\nField[] fields = targetClass.getDeclaredFields();<\/pre>\n<p>\u4ee5\u4e0a\u5c31\u662f\u300aSpring \u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528 Bean \u53cd\u5c04\u83b7\u53d6\u4e0d\u5230\u5c5e\u6027\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spring \u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528 B&#46;&#46;&#46;<\/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-203705","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203705","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=203705"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203705\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}