{"id":206148,"date":"2025-06-12T10:25:06","date_gmt":"2025-06-12T02:25:06","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206148\/"},"modified":"2025-06-12T10:25:06","modified_gmt":"2025-06-12T02:25:06","slug":"go-%e8%af%ad%e8%a8%80%e4%b8%ad-defer-%e5%92%8c-recover-%e7%9a%84%e5%a5%87%e5%a6%99%e9%85%8d%e5%90%88%ef%bc%9a%e4%b8%ba%e4%bb%80%e4%b9%88%e7%a8%8b%e5%ba%8f%e6%9c%80%e7%bb%88%e8%be%93%e5%87%ba-0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206148\/","title":{"rendered":"Go \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u5947\u5999\u914d\u5408\uff1a\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u6700\u7ec8\u8f93\u51fa 0\uff1f"},"content":{"rendered":"<p>\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762GOLANG\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGOLANG\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300aGo \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u5947\u5999\u914d\u5408\uff1a\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u6700\u7ec8\u8f93\u51fa 0\uff1f \u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01,<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241104\/17307266876728cb1f30ebf.jpg\" class=\"aligncenter\">,<br \/>\n<strong>go \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u795e\u5947\u4f5c\u7528<\/strong>,\u5728 go \u8bed\u8a00\u4e2d\uff0c\u4ee5\u4e0b\u7a0b\u5e8f\u4e3a\u4ec0\u4e48\u6700\u7ec8\u4f1a\u8f93\u51fa 0 \u5462\uff1f,<br \/>\n<strong>\u7b54\u6848\u89e3\u6790\uff1a<\/strong>,\u5f53 go \u8bed\u8a00\u9047\u5230 panic \u65f6\uff0c\u4f1a\u7acb\u5373\u6267\u884c defer \u51fd\u6570\u3002\u5728 defer \u51fd\u6570\u4e2d\uff0c\u5982\u679c\u9047\u5230 recover\uff0c\u5219\u4f1a\u5ffd\u7565\u5f02\u5e38\uff0c\u7ee7\u7eed\u6267\u884c defer \u4e4b\u540e\u7684\u4ee3\u7801\u3002,\u5173\u952e\u5728\u4e8e test \u51fd\u6570\u6709\u4e00\u4e2a int \u7c7b\u578b\u7684\u8fd4\u56de\u503c\uff0c\u8fd9\u4e2a\u8fd4\u56de\u503c\u4f1a\u5728\u8c03\u7528\u65f6\u521d\u59cb\u5316\u4e3a 0\u3002\u5728 defer \u51fd\u6570\u4e2d\uff0c\u53ef\u4ee5\u4fee\u6539\u8fd9\u4e2a\u8fd4\u56de\u503c\u3002\u5982\u679c\u6211\u4eec\u5728 defer \u51fd\u6570\u7684\u6700\u540e\u6dfb\u52a0\u4e00\u53e5 result = 1\uff0c\u90a3\u4e48\u7a0b\u5e8f\u8f93\u51fa\u5c06\u662f 1\uff0c\u800c\u4e0d\u662f 0\u3002,\u56e0\u6b64\uff0c\u7531\u4e8e defer \u51fd\u6570\u4e2d\u7684 recover \u5ffd\u7565\u4e86 panic \u5f02\u5e38\uff0c\u5bfc\u81f4 test \u51fd\u6570\u6ca1\u6709\u6b63\u5e38\u8fd4\u56de 100\uff0c\u800c\u662f\u8fd4\u56de\u4e86\u9ed8\u8ba4\u503c 0\u3002,\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aGo \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u5947\u5999\u914d\u5408\uff1a\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u6700\u7ec8\u8f93\u51fa 0\uff1f \u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01,go \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u795e\u5947\u4f5c\u7528,\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762GOLANG\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGOLANG\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300aGo \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u5947\u5999\u914d\u5408\uff1a\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u6700\u7ec8\u8f93\u51fa 0\uff1f \u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\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 \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u5947\u5999\u914d\u5408\uff1a\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u6700\u7ec8\u8f93\u51fa 0\uff1f <\/span><\/p>\n<h1>Go \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u5947\u5999\u914d\u5408\uff1a\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u6700\u7ec8\u8f93\u51fa 0\uff1f <\/h1>\n<p><span>2024-11-04 21:25:02<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762GOLANG\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGOLANG\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300aGo \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u5947\u5999\u914d\u5408\uff1a\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u6700\u7ec8\u8f93\u51fa 0\uff1f \u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241104\/17307266876728cb1f30ebf.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>go \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u795e\u5947\u4f5c\u7528<\/strong><\/p>\n<p>\u5728 go \u8bed\u8a00\u4e2d\uff0c\u4ee5\u4e0b\u7a0b\u5e8f\u4e3a\u4ec0\u4e48\u6700\u7ec8\u4f1a\u8f93\u51fa 0 \u5462\uff1f<\/p>\n<pre>package main\n\nimport (\n    \"fmt\"\n    \"errors\"\n)\n\nfunc foo() {\n    panic(errors.New(\"bug\"))\n    return\n}\n\nfunc test() (result int) {\n    defer func() {\n        if r := recover(); r != nil {\n            err := r.(error)\n            fmt.Println(\"catch error\", err) \/\/ catch error bug\n        }\n    }()\n\n    foo()\n\n    return 100\n}\n\nfunc main() {\n    fmt.Println(test()) \/\/ 0\n}<\/pre>\n<p><strong>\u7b54\u6848\u89e3\u6790\uff1a<\/strong><\/p>\n<p>\u5f53 go \u8bed\u8a00\u9047\u5230 panic \u65f6\uff0c\u4f1a\u7acb\u5373\u6267\u884c defer \u51fd\u6570\u3002\u5728 defer \u51fd\u6570\u4e2d\uff0c\u5982\u679c\u9047\u5230 recover\uff0c\u5219\u4f1a\u5ffd\u7565\u5f02\u5e38\uff0c\u7ee7\u7eed\u6267\u884c defer \u4e4b\u540e\u7684\u4ee3\u7801\u3002<\/p>\n<p>\u5173\u952e\u5728\u4e8e test \u51fd\u6570\u6709\u4e00\u4e2a int \u7c7b\u578b\u7684\u8fd4\u56de\u503c\uff0c\u8fd9\u4e2a\u8fd4\u56de\u503c\u4f1a\u5728\u8c03\u7528\u65f6\u521d\u59cb\u5316\u4e3a 0\u3002\u5728 defer \u51fd\u6570\u4e2d\uff0c\u53ef\u4ee5\u4fee\u6539\u8fd9\u4e2a\u8fd4\u56de\u503c\u3002\u5982\u679c\u6211\u4eec\u5728 defer \u51fd\u6570\u7684\u6700\u540e\u6dfb\u52a0\u4e00\u53e5 result = 1\uff0c\u90a3\u4e48\u7a0b\u5e8f\u8f93\u51fa\u5c06\u662f 1\uff0c\u800c\u4e0d\u662f 0\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u7531\u4e8e defer \u51fd\u6570\u4e2d\u7684 recover \u5ffd\u7565\u4e86 panic \u5f02\u5e38\uff0c\u5bfc\u81f4 test \u51fd\u6570\u6ca1\u6709\u6b63\u5e38\u8fd4\u56de 100\uff0c\u800c\u662f\u8fd4\u56de\u4e86\u9ed8\u8ba4\u503c 0\u3002<\/p>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aGo \u8bed\u8a00\u4e2d defer \u548c recover \u7684\u5947\u5999\u914d\u5408\uff1a\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u6700\u7ec8\u8f93\u51fa 0\uff1f \u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   PHP\u5982\u4f55\u4e0eMySQL\u6570\u636e\u5e93\u5efa\u7acb\u8fde\u63a5\uff1f\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u5982\u4f55\u4e0b\u8f7d Virnstruments Phoenix Rise\u3001Hit \u548c Whoosh Builder\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd&#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-206148","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206148","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=206148"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206148\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206148"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206148"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}