{"id":205993,"date":"2025-06-12T13:15:36","date_gmt":"2025-06-12T05:15:36","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205993\/"},"modified":"2025-06-12T13:15:36","modified_gmt":"2025-06-12T05:15:36","slug":"go-%e5%8f%8d%e5%b0%84%e4%b8%ad%e7%9a%84-elem-%e6%96%b9%e6%b3%95%e5%a6%82%e4%bd%95%e6%93%8d%e4%bd%9c%e6%8c%87%e5%90%91%e6%8c%87%e9%92%88%e5%af%b9%e8%b1%a1%e7%9a%84%e6%8c%87%e9%92%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205993\/","title":{"rendered":"Go \u53cd\u5c04\u4e2d\u7684 Elem() \u65b9\u6cd5\u5982\u4f55\u64cd\u4f5c\u6307\u5411\u6307\u9488\u5bf9\u8c61\u7684\u6307\u9488\uff1f"},"content":{"rendered":"<p>GOLANG\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\u300aGo \u53cd\u5c04\u4e2d\u7684 Elem() \u65b9\u6cd5\u5982\u4f55\u64cd\u4f5c\u6307\u5411\u6307\u9488\u5bf9\u8c61\u7684\u6307\u9488\uff1f\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,<br \/>\n<br \/>,<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241031\/17303431066722f0c249499.jpg\" class=\"aligncenter\">,<br \/>\n<strong>Go \u53cd\u5c04 (reflect) elem \u65b9\u6cd5\u64cd\u4f5c\u6307\u9488\u5bf9\u8c61<\/strong>,Go \u8bed\u8a00\u4e2d\u7684\u53cd\u5c04\u5305\u63d0\u4f9b\u4e86\u64cd\u4f5c\u53cd\u5c04\u7c7b\u578b\u548c\u53cd\u5c04\u503c\u7684\u80fd\u529b\u3002elem \u65b9\u6cd5\u7528\u4e8e\u83b7\u53d6\u6307\u5411\u503c\u7684\u6307\u9488\u503c\u3002,<br \/>\n<strong>\u95ee\u9898\u80cc\u666f<\/strong>,\u6211\u4eec\u6709\u4e00\u4e2a\u63a5\u53e3\u7c7b\u578b A\uff0c\u4e00\u4e2a\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u7ed3\u6784\u4f53 B\uff0c\u4ee5\u53ca\u4e00\u4e2a\u6307\u5411 B \u5b9e\u4f8b\u7684\u6307\u9488\u53d8\u91cf a\u3002\u6211\u4eec\u4f7f\u7528\u53cd\u5c04\u6765\u63a2\u7d22\u6307\u9488\u53d8\u91cf a\u3002,<br \/>\n<strong>a-&gt;elem() \u6307\u5411\u7684\u5730\u5740<\/strong>,\u901a\u8fc7 reflect.ValueOf(&amp;a) \u83b7\u53d6 &amp;a \u7684\u53cd\u5c04\u503c\u540e\uff0c\u8c03\u7528 Elem() \u65b9\u6cd5\u8fd4\u56de\u7684\u662f\u6307\u5411 a \u503c\uff08\u6307\u5411 B \u5b9e\u4f8b\u7684\u6307\u9488\uff09\u7684\u6307\u9488\uff0c<br \/>\n<strong>\u800c\u4e0d\u662f<\/strong> a \u672c\u8eab\u7684\u503c\u3002,\u4f8b\u5982\uff0c\u5982\u679c a \u53d8\u91cf\u7684\u5730\u5740\u662f x1\uff0c\u800c b \u53d8\u91cf\u7684\u5730\u5740\u662f x2\uff0c\u5219 reflect.ValueOf(&amp;a).Elem() \u7684\u503c\u5c06\u662f *x1\uff0c\u8868\u793a\u6307\u5411 b \u53d8\u91cf\u7684\u6307\u9488\u3002,\u56e0\u6b64\uff0creflect.ValueOf(&amp;a).Elem().Elem() \u8fd4\u56de\u7684\u662f\u6307\u5411 x2 \u7684\u6307\u9488\uff0c\u4e5f\u5c31\u662f\u6307\u5411 b \u53d8\u91cf\u7684\u6307\u9488\u672c\u8eab\u3002,\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aGo \u53cd\u5c04\u4e2d\u7684 Elem() \u65b9\u6cd5\u5982\u4f55\u64cd\u4f5c\u6307\u5411\u6307\u9488\u5bf9\u8c61\u7684\u6307\u9488\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGOLANG\u77e5\u8bc6\uff01,GOLANG\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\u300aGo \u53cd\u5c04\u4e2d\u7684 Elem() \u65b9\u6cd5\u5982\u4f55\u64cd\u4f5c\u6307\u5411\u6307\u9488\u5bf9\u8c61\u7684\u6307\u9488\uff1f\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,<br \/>\n<b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span> <span>Go \u53cd\u5c04\u4e2d\u7684 Elem() \u65b9\u6cd5\u5982\u4f55\u64cd\u4f5c\u6307\u5411\u6307\u9488\u5bf9\u8c61\u7684\u6307\u9488\uff1f<\/span><\/p>\n<h1>Go \u53cd\u5c04\u4e2d\u7684 Elem() \u65b9\u6cd5\u5982\u4f55\u64cd\u4f5c\u6307\u5411\u6307\u9488\u5bf9\u8c61\u7684\u6307\u9488\uff1f<\/h1>\n<p><span>2024-10-31 10:52:01<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>GOLANG\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\u300aGo \u53cd\u5c04\u4e2d\u7684 Elem() \u65b9\u6cd5\u5982\u4f55\u64cd\u4f5c\u6307\u5411\u6307\u9488\u5bf9\u8c61\u7684\u6307\u9488\uff1f\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><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241031\/17303431066722f0c249499.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Go \u53cd\u5c04 (reflect) elem \u65b9\u6cd5\u64cd\u4f5c\u6307\u9488\u5bf9\u8c61<\/strong><\/p>\n<p>Go \u8bed\u8a00\u4e2d\u7684\u53cd\u5c04\u5305\u63d0\u4f9b\u4e86\u64cd\u4f5c\u53cd\u5c04\u7c7b\u578b\u548c\u53cd\u5c04\u503c\u7684\u80fd\u529b\u3002elem \u65b9\u6cd5\u7528\u4e8e\u83b7\u53d6\u6307\u5411\u503c\u7684\u6307\u9488\u503c\u3002<\/p>\n<p><strong>\u95ee\u9898\u80cc\u666f<\/strong><\/p>\n<p>\u6211\u4eec\u6709\u4e00\u4e2a\u63a5\u53e3\u7c7b\u578b A\uff0c\u4e00\u4e2a\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u7ed3\u6784\u4f53 B\uff0c\u4ee5\u53ca\u4e00\u4e2a\u6307\u5411 B \u5b9e\u4f8b\u7684\u6307\u9488\u53d8\u91cf a\u3002\u6211\u4eec\u4f7f\u7528\u53cd\u5c04\u6765\u63a2\u7d22\u6307\u9488\u53d8\u91cf a\u3002<\/p>\n<p><strong>a-&gt;elem() \u6307\u5411\u7684\u5730\u5740<\/strong><\/p>\n<p>\u901a\u8fc7 reflect.ValueOf(&amp;a) \u83b7\u53d6 &amp;a \u7684\u53cd\u5c04\u503c\u540e\uff0c\u8c03\u7528 Elem() \u65b9\u6cd5\u8fd4\u56de\u7684\u662f\u6307\u5411 a \u503c\uff08\u6307\u5411 B \u5b9e\u4f8b\u7684\u6307\u9488\uff09\u7684\u6307\u9488\uff0c<strong>\u800c\u4e0d\u662f<\/strong> a \u672c\u8eab\u7684\u503c\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5982\u679c a \u53d8\u91cf\u7684\u5730\u5740\u662f x1\uff0c\u800c b \u53d8\u91cf\u7684\u5730\u5740\u662f x2\uff0c\u5219 reflect.ValueOf(&amp;a).Elem() \u7684\u503c\u5c06\u662f *x1\uff0c\u8868\u793a\u6307\u5411 b \u53d8\u91cf\u7684\u6307\u9488\u3002<\/p>\n<p>\u56e0\u6b64\uff0creflect.ValueOf(&amp;a).Elem().Elem() \u8fd4\u56de\u7684\u662f\u6307\u5411 x2 \u7684\u6307\u9488\uff0c\u4e5f\u5c31\u662f\u6307\u5411 b \u53d8\u91cf\u7684\u6307\u9488\u672c\u8eab\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aGo \u53cd\u5c04\u4e2d\u7684 Elem() \u65b9\u6cd5\u5982\u4f55\u64cd\u4f5c\u6307\u5411\u6307\u9488\u5bf9\u8c61\u7684\u6307\u9488\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGOLANG\u77e5\u8bc6\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u4f7f\u7528\u72ec\u7279\u7684\u914d\u7f6e\u8f7b\u677e\u8bbe\u7f6e\u591a\u4e2a Spring Bean\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u5982\u4f55\u9009\u62e9\u9002\u5408\u81ea\u5df1\u7684\u7535\u8111\u5305\uff1f\u4ef7\u683c\u3001\u54c1\u8d28\u548c\u529f\u80fd\u7684\u7efc\u5408\u8861\u91cf\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>GOLANG\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66&#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-205993","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205993","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=205993"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205993\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}