{"id":207532,"date":"2025-07-08T12:20:00","date_gmt":"2025-07-08T04:20:00","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207532\/"},"modified":"2025-07-08T12:20:00","modified_gmt":"2025-07-08T04:20:00","slug":"%e6%8e%a5%e5%8f%a3%e5%86%85%e5%8f%8d%e5%b0%84%e9%98%b5%e5%88%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207532\/","title":{"rendered":"\u63a5\u53e3\u5185\u53cd\u5c04\u9635\u5217"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u63a5\u53e3\u5185\u53cd\u5c04\u9635\u5217<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-23 13:21:31<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u5927\u5bb6\u597d\uff0c\u4eca\u5929\u672c\u4eba\u7ed9\u5927\u5bb6\u5e26\u6765\u6587\u7ae0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u63a5\u53e3\u5185\u53cd\u5c04\u9635\u5217\u300b<\/span>\uff0c\u6587\u4e2d\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span><\/span>\uff0c\u5982\u679c\u4f60\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u90a3\u5c31\u8bf7\u5404\u4f4d\u670b\u53cb\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427~\u5e0c\u671b\u80fd\u771f\u6b63\u5e2e\u5230\u4f60\u4eec\uff0c\u8c22\u8c22\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u6b63\u5728\u5c1d\u8bd5\u901a\u8fc7\u53cd\u5c04\u8bbf\u95ee\u63a5\u53e3\u5185\u7684\u6570\u7ec4\u3002<\/p>\n<p>\u5728\u5176\u4ed6\u5b57\u6bb5\u4e2d\uff0c\u6211\u8fd8\u6709\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\uff1a<\/p>\n<pre>type configuration struct {\n    ...\n    sysvars []string\n}<\/pre>\n<p>\u6211\u53ef\u4ee5\u50cf\u8fd9\u6837\u8bbf\u95ee\u5b57\u6bb5<em>sysvars<\/em>\uff1a<\/p>\n<pre>elem := reflect.valueof(conf).elem()\nsysvarsinterface := elem.fieldbyname(\"sysvars\").interface()<\/pre>\n<p>\u6b64\u65f6\uff0c\u5f53\u4f7f\u7528 goland \u7684\u8c03\u8bd5\u5668\u65f6\uff0c\u6211\u53ef\u4ee5\u770b\u5230 <em>sysvarsinterface<\/em> \u662f\u4e00\u4e2a\u5177\u6709\u6211\u671f\u671b\u7684\u4e24\u4e2a\u503c\u7684\u63a5\u53e3\u3002\u65e2\u7136\u5b83\u662f\u4e00\u4e2a\u6570\u7ec4\uff0c\u6211\u60f3\u6211\u9700\u8981\u5c06\u5b83\u89c6\u4e3a\u63a5\u53e3\u5e76\u518d\u6b21\u53cd\u6620\u5b83\uff1f\u6240\u4ee5\u5b83\u770b\u8d77\u6765\u50cf\u8fd9\u6837\uff1a<\/p>\n<pre>sysvarsvalue := reflect.valueof(&amp;sysvarsinterface)\nsysvarselem := sysvarsvalue.elem()<\/pre>\n<p>\u4f46\u8fed\u4ee3\u5931\u8d25\uff1a<\/p>\n<pre>for i:=0; i&lt; sysvarselem.numfield(); i++ {\n    vname := sysvarselem.type().field(i).name\n    fmt.println(vname)\n}<\/pre>\n<p>\u8bf4\uff1a<\/p>\n<pre>panic: reflect: call of reflect.Value.NumField on interface Value<\/pre>\n<p>\u6709\u4ec0\u4e48\u60f3\u6cd5\u6211\u505a\u9519\u4e86\u4ec0\u4e48\u5417\uff1f <\/p>\n<p>\u6211\u7528\u8fd9\u4e2a\u4f5c\u4e3a\u53c2\u8003<\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u4e0d\u9700\u8981\u53cc\u91cd\u53cd\u5c04\uff0c\u4f60\u53ef\u4ee5\u50cf\u8fd9\u6837\u8fed\u4ee3sysvars\uff1a<\/p>\n<pre>p := &amp;Configuration{\nSysVars :[]string{\"a\",\"b\",\"c\"},\n}\n\ns:= reflect.ValueOf(p).Elem().FieldByName(\"SysVars\")\nfor i:=0 ; i&lt; s.Len() ; i++ {\n   fmt.Println(s.Index(i).String())\n}<\/pre>\n<p>\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u63a5\u53e3\u5185\u53cd\u5c04\u9635\u5217\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#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-207532","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207532","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=207532"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207532\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207532"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207532"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207532"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}