{"id":207273,"date":"2025-07-08T11:59:25","date_gmt":"2025-07-08T03:59:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207273\/"},"modified":"2025-07-08T11:59:25","modified_gmt":"2025-07-08T03:59:25","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8%e6%97%a0%e9%9c%80%e5%ae%9e%e4%be%8b%e5%8c%96%e7%bb%93%e6%9e%84%e7%9a%84%e6%83%85%e5%86%b5%e4%b8%8b%e8%8e%b7%e5%8f%96%e7%bb%93%e6%9e%84%e6%a0%87%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207273\/","title":{"rendered":"\u5982\u4f55\u5728\u65e0\u9700\u5b9e\u4f8b\u5316\u7ed3\u6784\u7684\u60c5\u51b5\u4e0b\u83b7\u53d6\u7ed3\u6784\u6807\u8bb0"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u5728\u65e0\u9700\u5b9e\u4f8b\u5316\u7ed3\u6784\u7684\u60c5\u51b5\u4e0b\u83b7\u53d6\u7ed3\u6784\u6807\u8bb0<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-21 12:09:36<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60Golang<\/span>\uff0c\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u5728\u65e0\u9700\u5b9e\u4f8b\u5316\u7ed3\u6784\u7684\u60c5\u51b5\u4e0b\u83b7\u53d6\u7ed3\u6784\u6807\u8bb0\u300b<\/span>\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff01\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec<\/span>\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/span><\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

type User struct{ \n    Name string `json:\"name\"`\n}\n\nfunc main() { \n    t := reflect.TypeOf(User{}) \n}<\/pre>\n
\u65e0\u9700\u5b9e\u4f8b\u5316\u5373\u53ef\u6355\u83b7\u6807\u7b7e\u7684\u503c\u3002\u4f8b\u5982\uff0c\u65e0\u9700\u5b9e\u4f8b\u5316 user \u7ed3\u6784\u5373\u53ef\u6355\u83b7\u6807\u7b7e\u201cjson\u201d\u7684\u503c\u3002<\/p>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
\u5728\u51e0\u4e4e\u6240\u6709\u573a\u666f\u4e2d\uff0c\u521b\u5efa\u503c\u90fd\u4e0d\u662f\u6027\u80fd\u95ee\u9898\uff0c\u4f46\u60a8\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 nil \u6307\u9488\u503c\u6765\u907f\u514d\u521b\u5efa\u503c\u3002<\/p>\n
t := reflect.typeof((*user)(nil)).elem() \/\/ elem \"dereferences\" the pointer type.<\/pre>\n
\u4f7f\u7528\u6b64\u5904\u663e\u793a\u7684\u6307\u9488\u6a21\u5f0f\u7684\u539f\u56e0\u662f\uff0c\u5355\u4e00\u8bed\u6cd5\u9002\u7528\u4e8e\u6bcf\u79cd\u7c7b\u578b\u3002\u7279\u522b\u662f\uff0c\u5b83\u5904\u7406\u63a5\u53e3\u7c7b\u578b\uff1a<\/p>\n
type i interface{}\n\n\/\/ naive developers might expect the following\n\/\/ to return the type for i, but it actually\n\/\/ returns nil. \nt := reflect.typeof(i(nil))\n\n\/\/ the pointer pattern returns the type for i.\nt = reflect.typeof((*i)(nil)).elem()<\/pre>\n
\u5bf9\u4e8e\u6240\u6709\u7c7b\u578b\uff0c\u6307\u9488\u8bed\u6cd5\u90fd\u662f\u76f8\u540c\u7684\uff0c\u4e0e\u7c7b\u578b\u7684\u96f6\u503c\u5982\u4f55\u5199\u5165\u65e0\u5173\uff1a<\/p>\n
t = reflect.typeof(user{})\nt = reflect.typeof(uint(0))\nt = reflect.typeof(mystring(\"\"))<\/pre>\n
\u4f7f\u7528 t =reflect.typeof((*t)(nil)).elem()<\/code>\uff0c\u5176\u4e2d t<\/code> \u662f\u4efb\u4f55\u7c7b\u578b\uff1a<\/p>\n
t = reflect.TypeOf((*User)(nil)).Elem()\nt = reflect.TypeOf((*uint)(nil)).Elem()\nt = reflect.TypeOf((*myString)(nil)).Elem()<\/pre>\n
\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\u5982\u4f55\u5728\u65e0\u9700\u5b9e\u4f8b\u5316\u7ed3\u6784\u7684\u60c5\u51b5\u4e0b\u83b7\u53d6\u7ed3\u6784\u6807\u8bb0\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":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/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-207273","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207273","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=207273"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207273\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}