{"id":206169,"date":"2025-06-12T10:23:45","date_gmt":"2025-06-12T02:23:45","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206169\/"},"modified":"2025-06-12T10:23:45","modified_gmt":"2025-06-12T02:23:45","slug":"go-%e4%b8%ad-var-_-handler-handlernil-%e8%bf%99%e6%ae%b5%e4%bb%a3%e7%a0%81%e7%9a%84%e5%90%ab%e4%b9%89%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206169\/","title":{"rendered":"Go \u4e2d `var _ Handler = (*handler)(nil)` \u8fd9\u6bb5\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0
\n\u300aGo \u4e2d `var _ Handler = (*handler)(nil)` \u8fd9\u6bb5\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b
\n<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9…\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01,
\n,
\n\u5728 go \u4e2d\u5b9a\u4e49\u53d8\u91cf\u65f6\u7684\u7591\u60d1\u89e3\u7b54<\/strong>,\u5728\u9605\u8bfb go \u8bed\u6cd5\u57fa\u7840\u65f6\uff0c\u4f60\u53ef\u80fd\u4f1a\u9047\u5230\u5982\u4e0b\u5199\u6cd5\uff1a,\u8fd9\u4e2a\u5199\u6cd5\u53ef\u80fd\u4f1a\u8ba9\u4eba\u611f\u5230\u56f0\u60d1\uff0c\u672c\u6587\u5c06\u4e3a\u4f60\u8be6\u7ec6\u89e3\u91ca\u5176\u542b\u4e49\u3002,\u9996\u5148\uff0c\u4e86\u89e3\u76f8\u5173\u63a5\u53e3\u548c\u7ed3\u6784\u4f53\u975e\u5e38\u91cd\u8981\uff1a,
\n\u63a5\u53e3<\/strong>,
\n\u7ed3\u6784\u4f53<\/strong>,
\n\u95ee\u98981\uff1a\u4e0a\u9762\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f<\/strong>,\u4e0a\u9762\u4ee3\u7801\u7684\u76ee\u7684\u662f\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a _ \u7684\u53d8\u91cf\uff0c\u8be5\u53d8\u91cf\u5b9e\u73b0\u4e86 handler \u63a5\u53e3\u3002(*handler)(nil) \u90e8\u5206\u521b\u5efa\u4e86\u4e00\u4e2a handler \u7ed3\u6784\u4f53\u7684\u96f6\u503c\uff0c\u8be5\u96f6\u503c\u7c7b\u578b\u4e3a *handler\uff0c\u800c _ \u53d8\u91cf\u7684\u7c7b\u578b\u5219\u4e3a handler\u3002,\u8fd9\u79cd\u5199\u6cd5\u901a\u5e38\u7528\u4e8e\u5728\u7c7b\u578b\u65ad\u8a00\u6216\u5176\u4ed6\u60c5\u51b5\u4e0b\u9700\u8981\u4e00\u4e2a\u5b9e\u73b0\u4e86\u7279\u5b9a\u63a5\u53e3\u7c7b\u578b\u7684\u53d8\u91cf\u3002\u4f8b\u5982\uff0c\u5b83\u53ef\u4ee5\u7528\u4e8e\u5f3a\u5236\u5c06 handler \u7c7b\u578b\u65ad\u8a00\u4e3a handler \u7c7b\u578b\uff1a,\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aGo \u4e2d `var _ Handler = (*handler)(nil)` \u8fd9\u6bb5\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\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,\u5728 go \u4e2d\u5b9a\u4e49\u53d8\u91cf\u65f6\u7684\u7591\u60d1\u89e3\u7b54,\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0
\n\u300aGo \u4e2d `var _ Handler = (*handler)(nil)` \u8fd9\u6bb5\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b
\n<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9…\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go \u4e2d `var _ Handler = (*handler)(nil)` \u8fd9\u6bb5\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f<\/span><\/p>\n

Go \u4e2d `var _ Handler = (*handler)(nil)` \u8fd9\u6bb5\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f<\/h1>\n

2024-11-05 13:46:01<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\u300aGo \u4e2d `var _ Handler = (*handler)(nil)` \u8fd9\u6bb5\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9…\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01<\/p>\n

<\/p>\n

\u5728 go \u4e2d\u5b9a\u4e49\u53d8\u91cf\u65f6\u7684\u7591\u60d1\u89e3\u7b54<\/strong><\/p>\n

\u5728\u9605\u8bfb go \u8bed\u6cd5\u57fa\u7840\u65f6\uff0c\u4f60\u53ef\u80fd\u4f1a\u9047\u5230\u5982\u4e0b\u5199\u6cd5\uff1a<\/p>\n

var _ handler = (*handler)(nil)<\/pre>\n
\u8fd9\u4e2a\u5199\u6cd5\u53ef\u80fd\u4f1a\u8ba9\u4eba\u611f\u5230\u56f0\u60d1\uff0c\u672c\u6587\u5c06\u4e3a\u4f60\u8be6\u7ec6\u89e3\u91ca\u5176\u542b\u4e49\u3002<\/p>\n
\u9996\u5148\uff0c\u4e86\u89e3\u76f8\u5173\u63a5\u53e3\u548c\u7ed3\u6784\u4f53\u975e\u5e38\u91cd\u8981\uff1a<\/p>\n
\u63a5\u53e3<\/strong><\/p>\n
type handler interface {\n    create() core.handlerfunc\n    cancel() core.handlerfunc\n    detail() core.handlerfunc\n}<\/pre>\n
\u7ed3\u6784\u4f53<\/strong><\/p>\n
type handler struct {\n    logger  *zap.logger\n    db      mysql.repo\n    cache   redis.repo\n    hashids hash.hash\n}<\/pre>\n
\u95ee\u98981\uff1a\u4e0a\u9762\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f<\/strong><\/p>\n
\u4e0a\u9762\u4ee3\u7801\u7684\u76ee\u7684\u662f\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a _ \u7684\u53d8\u91cf\uff0c\u8be5\u53d8\u91cf\u5b9e\u73b0\u4e86 handler \u63a5\u53e3\u3002(*handler)(nil) \u90e8\u5206\u521b\u5efa\u4e86\u4e00\u4e2a handler \u7ed3\u6784\u4f53\u7684\u96f6\u503c\uff0c\u8be5\u96f6\u503c\u7c7b\u578b\u4e3a *handler\uff0c\u800c _ \u53d8\u91cf\u7684\u7c7b\u578b\u5219\u4e3a handler\u3002<\/p>\n
\u8fd9\u79cd\u5199\u6cd5\u901a\u5e38\u7528\u4e8e\u5728\u7c7b\u578b\u65ad\u8a00\u6216\u5176\u4ed6\u60c5\u51b5\u4e0b\u9700\u8981\u4e00\u4e2a\u5b9e\u73b0\u4e86\u7279\u5b9a\u63a5\u53e3\u7c7b\u578b\u7684\u53d8\u91cf\u3002\u4f8b\u5982\uff0c\u5b83\u53ef\u4ee5\u7528\u4e8e\u5f3a\u5236\u5c06 handler \u7c7b\u578b\u65ad\u8a00\u4e3a handler \u7c7b\u578b\uff1a<\/p>\n
var h Handler = (*handler)(nil)<\/pre>\n
\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aGo \u4e2d `var _ Handler = (*handler)(nil)` \u8fd9\u6bb5\u4ee3\u7801\u7684\u542b\u4e49\u662f\u4ec0\u4e48\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
\n
\n <\/dt>\n
\n   \u5982\u4f55\u7ed9\u5bb9\u5668\u6dfb\u52a0\u4e0d\u89c4\u5219\u56fe\u5f62\u8fb9\u6846\uff1f\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   \u7528\u4e8e\u6570\u636e\u5206\u6790\u7684 Python \u7b80\u4ecb\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9...<\/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-206169","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206169","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=206169"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206169\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206169"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206169"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}