{"id":203230,"date":"2025-05-22T12:11:33","date_gmt":"2025-05-22T04:11:33","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203230\/"},"modified":"2025-05-22T12:11:33","modified_gmt":"2025-05-22T04:11:33","slug":"item-%e6%9b%b4%e5%96%9c%e6%ac%a2%e6%8e%a5%e5%8f%a3%e8%80%8c%e4%b8%8d%e6%98%af%e5%8f%8d%e5%b0%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203230\/","title":{"rendered":"Item \u66f4\u559c\u6b22\u63a5\u53e3\u800c\u4e0d\u662f\u53cd\u5c04"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Item \u66f4\u559c\u6b22\u63a5\u53e3\u800c\u4e0d\u662f\u53cd\u5c04<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span>    <\/p>\n<p>\u6587\u7ae0\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300aItem \u66f4\u559c\u6b22\u63a5\u53e3\u800c\u4e0d\u662f\u53cd\u5c04\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><\/p>\n<p><strong>java \u4e2d\u7684\u53cd\u5c04 (java.lang.reflect):<\/strong><br \/> \u901a\u8fc7\u53cd\u601d\uff0c\u6709\u53ef\u80fd\uff1a<\/p>\n<ul>\n<li>\u4ee5\u7f16\u7a0b\u65b9\u5f0f\u8bbf\u95ee\u4efb\u610f\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3001\u65b9\u6cd5\u548c\u5b57\u6bb5\u3002<\/li>\n<li>\u4ee5\u53cd\u5c04\u65b9\u5f0f\u64cd\u4f5c\u7c7b\u53ca\u5176\u6210\u5458\uff08\u6784\u9020\u51fd\u6570\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\uff09\uff0c\u5141\u8bb8\u60a8\u521b\u5efa\u5b9e\u4f8b\u3001\u8c03\u7528\u65b9\u6cd5\u548c\u8bbf\u95ee\u5b57\u6bb5\u3002<\/li>\n<li>\u5373\u4f7f\u7c7b\u5728\u7f16\u8bd1\u671f\u95f4\u4e0d\u5b58\u5728\uff0c\u4e5f\u53ef\u4ee5\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<p><strong>\u53cd\u5c04\u7684\u7f3a\u70b9\uff1a<\/strong><br \/> \u7f16\u8bd1\u65f6\u7c7b\u578b\u68c0\u67e5\u4e22\u5931\uff1a<\/p>\n<ul>\n<li>\u901a\u5e38\u5728\u7f16\u8bd1\u65f6\u68c0\u6d4b\u5230\u7684\u9519\u8bef\u53ea\u4f1a\u5728\u8fd0\u884c\u65f6\u51fa\u73b0\u3002<\/li>\n<li>\u793a\u4f8b\uff1a\u53cd\u5c04\u6027\u8c03\u7528\u4e0d\u5b58\u5728\u6216\u4e0d\u53ef\u8bbf\u95ee\u7684\u65b9\u6cd5\u53ef\u80fd\u4f1a\u5728\u8fd0\u884c\u65f6\u751f\u6210\u5f02\u5e38\u3002<\/li>\n<\/ul>\n<p><strong>\u7e41\u7410\u7684\u4ee3\u7801\uff1a<\/strong><br \/> \u53cd\u5c04\u9700\u8981\u66f4\u590d\u6742\u4e14\u53ef\u8bfb\u6027\u8f83\u5dee\u7684\u4ee3\u7801\u3002<br \/> \u793a\u4f8b\uff1a<\/p>\n<pre>method method = obj.getclass().getmethod(\"methodname\");\nmethod.invoke(obj, args);\n\n<\/pre>\n<p><strong>\u8868\u73b0\u4e0d\u4f73\uff1a<\/strong><\/p>\n<ul>\n<li>\u53cd\u5c04\u65b9\u6cd5\u8c03\u7528\u6bd4\u666e\u901a\u8c03\u7528\u6162\u5f97\u591a\u3002<\/li>\n<li>\u793a\u4f8b\uff1a\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\uff0c\u53cd\u5c04\u53ef\u80fd\u6bd4\u76f4\u63a5\u65b9\u6cd5\u8c03\u7528\u6162 11 \u500d\u3002<\/li>\n<\/ul>\n<p><strong>\u53cd\u5c04\u7684\u5e94\u7528\uff1a<\/strong><\/p>\n<ul>\n<li>\u7528\u4e8e\u4ee3\u7801\u5206\u6790\u5de5\u5177\u3001\u4f9d\u8d56\u6ce8\u5165\u6846\u67b6\u548c\u670d\u52a1\u63d0\u4f9b\u6846\u67b6\u3002<\/li>\n<li>\u5373\u4f7f\u5728\u8fd9\u4e9b\u60c5\u51b5\u4e0b\uff0c\u7531\u4e8e\u5176\u7f3a\u70b9\uff0c\u4e5f\u5e94\u5c3d\u53ef\u80fd\u907f\u514d\u3002<\/li>\n<\/ul>\n<p><strong>\u6709\u9650\u4f7f\u7528\u53cd\u5c04\uff1a<\/strong><br \/> \u5efa\u8bae\u6280\u672f\uff1a\u4ec5\u4f7f\u7528\u53cd\u5c04\u5728\u7f16\u8bd1\u65f6\u5b9e\u4f8b\u5316\u672a\u77e5\u7c7b\uff0c\u5e76\u901a\u8fc7\u5df2\u77e5\u63a5\u53e3\u6216\u8d85\u7c7b\u5f15\u7528\u8fd9\u4e9b\u5b9e\u4f8b\u3002<\/p>\n<p>\u793a\u4f8b\uff1a<br \/> \u521b\u5efa set \u5b9e\u4f8b\u7684\u7a0b\u5e8f\uff0c\u7531\u547d\u4ee4\u884c\u6307\u5b9a\uff1a<\/p>\n<pre>Class&lt;? extends Set&lt;String&gt;&gt; cl = (Class&lt;? extends Set&lt;String&gt;&gt;) Class.forName(args[0]);\nConstructor&lt;? extends Set&lt;String&gt;&gt; cons = cl.getDeclaredConstructor();\nSet&lt;String&gt; s = cons.newInstance();\nfor (int i = 1; i &lt; args.length; i++) {\n    s.add(args[i]);\n}\nSystem.out.println(s);\n\n<\/pre>\n<p><strong>\u793a\u4f8b\u4e2d\u8bf4\u660e\u7684\u7f3a\u70b9\uff1a<\/strong><br \/><strong>\u8fd0\u884c\u65f6\u5f02\u5e38\uff1a<\/strong><\/p>\n<ul>\n<li>\u8be5\u793a\u4f8b\u5728\u8fd0\u884c\u65f6\u6700\u591a\u53ef\u4ee5\u751f\u6210\u516d\u4e2a\u4e0d\u540c\u7684\u5f02\u5e38\u3002<\/li>\n<li>\u5982\u679c\u4e0d\u4f7f\u7528\u53cd\u5c04\uff0c\u8fd9\u4e9b\u5f02\u5e38\u5c06\u5728\u7f16\u8bd1\u65f6\u88ab\u6355\u83b7\u3002<\/li>\n<\/ul>\n<p><strong>\u590d\u6742\u6027\u548c\u5197\u957f\uff1a<\/strong><\/p>\n<ul>\n<li>\u8be5\u793a\u4f8b\u9700\u8981 25 \u884c\u4ee3\u7801\u624d\u80fd\u4ece\u540d\u79f0\u5b9e\u4f8b\u5316\u4e00\u4e2a\u7c7b\uff0c\u800c\u76f4\u63a5\u8c03\u7528\u6784\u9020\u51fd\u6570\u53ea\u9700\u4e00\u884c\u4ee3\u7801\u5373\u53ef\u5b8c\u6210\u3002<\/li>\n<\/ul>\n<p><strong>\u672a\u7ecf\u9a8c\u8bc1\u7684\u6f14\u5458\u8b66\u544a\uff1a<\/strong><\/p>\n<ul>\n<li>\u5728\u793a\u4f8b\u4e2d\uff0c\u5b58\u5728\u672a\u68c0\u67e5\u5f3a\u5236\u8f6c\u6362\u7684\u5408\u6cd5\u8b66\u544a\uff0c\u56e0\u4e3a\u547d\u4ee4\u884c\u4e0a\u6307\u5b9a\u7684\u7c7b\u53ef\u80fd\u4e0d\u662f set \u7684\u5b9e\u73b0\u3002<\/li>\n<\/ul>\n<p><strong>\u53cd\u5c04\u7684\u5408\u6cd5\u4f7f\u7528\uff1a<\/strong><\/p>\n<ul>\n<li>\u52a8\u6001\u4f9d\u8d56\uff1a\u5f53\u7c7b\u3001\u65b9\u6cd5\u6216\u5b57\u6bb5\u5728\u8fd0\u884c\u65f6\u53ef\u80fd\u4e0d\u5b58\u5728\u65f6\u3002<\/li>\n<li>\u793a\u4f8b\uff1a\u60a8\u53ef\u4ee5\u4f7f\u7528\u53cd\u5c04\u6765\u652f\u6301\u5305\u7684\u591a\u4e2a\u7248\u672c\uff0c\u800c\u4e0d\u4f1a\u7834\u574f\u5411\u540e\u517c\u5bb9\u6027\u3002<\/li>\n<\/ul>\n<p>\u7ed3\u8bba\uff1a<br \/> \u53cd\u5c04\u5f88\u5f3a\u5927\uff0c\u4f46\u5b83\u4e5f\u6709\u5f88\u591a\u7f3a\u70b9\u3002<br \/> \u53ea\u8981\u6709\u53ef\u80fd\uff0c\u4ec5\u4f7f\u7528\u53cd\u5c04\u6765\u5b9e\u4f8b\u5316\u5bf9\u8c61\u5e76\u901a\u8fc7\u7f16\u8bd1\u65f6\u5df2\u77e5\u7684\u63a5\u53e3\u6216\u8d85\u7c7b\u8bbf\u95ee\u5b83\u4eec\u3002<\/p>\n<p>\u4e66\u4e2d\u7684\u793a\u4f8b\uff1a<br \/><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241102\/17305350066725de5ea897d.jpg\" class=\"aligncenter\"><\/p>\n<p>\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<p>      \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Item \u66f4\u559c\u6b22\u63a5\u53e3\u800c\u4e0d\u662f\u53cd\u5c04 &#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-203230","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203230","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=203230"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203230\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}