{"id":206095,"date":"2025-06-12T12:10:55","date_gmt":"2025-06-12T04:10:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206095\/"},"modified":"2025-06-12T12:10:55","modified_gmt":"2025-06-12T04:10:55","slug":"go-defer-%e8%af%ad%e5%8f%a5%e6%89%a7%e8%a1%8c%e9%a1%ba%e5%ba%8f%ef%bc%9a%e4%b8%ba%e4%bb%80%e4%b9%88%e4%bb%a3%e7%a0%81%e8%be%93%e5%87%ba-221%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206095\/","title":{"rendered":"Go defer \u8bed\u53e5\u6267\u884c\u987a\u5e8f\uff1a\u4e3a\u4ec0\u4e48\u4ee3\u7801\u8f93\u51fa 221\uff1f"},"content":{"rendered":"<p>\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aGo defer \u8bed\u53e5\u6267\u884c\u987a\u5e8f\uff1a\u4e3a\u4ec0\u4e48\u4ee3\u7801\u8f93\u51fa 221\uff1f\u300b<\/span>\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\uff01,<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241103\/17306060696726f3f531795.jpg\" class=\"aligncenter\">,<br \/>\n<strong>go\u6253\u5370defer\u5206\u6790<\/strong>,\u5728\u4ee5\u4e0b\u4ee3\u7801\u4e2d\uff1a,\u7a0b\u5e8f\u7684\u6253\u5370\u7ed3\u679c\u4e3a\uff1a,<br \/>\n<strong>\u7406\u89e3\u6253\u5370\u987a\u5e8f<\/strong>,\u8fd9\u4e2a\u95ee\u9898\u6d89\u53ca\u5230go\u8bed\u8a00\u4e2ddefer\u5173\u952e\u5b57\u7684\u4f7f\u7528\u3002defer\u6307\u5ef6\u8fdf\u6267\u884c\u7684\u610f\u601d\uff0c\u5373\u5728\u5f53\u524d\u51fd\u6570\u8fd4\u56de\u524d\u6267\u884cdefer\u540e\u9762\u7684\u51fd\u6570\u3002,defwer\u51fd\u6570\u9075\u5faa\u540e\u8fdb\u5148\u51fa\u7684\u539f\u5219\uff0c\u56e0\u6b64\u6267\u884c\u987a\u5e8f\u4e3a\uff1a,<br \/>\n<strong>\u7406\u89e3\u53c2\u6570\u4f20\u9012<\/strong>,defwer\u6ce8\u518c\u8981\u5ef6\u8fdf\u6267\u884c\u7684\u51fd\u6570\u65f6\uff0c\u8be5\u51fd\u6570\u6240\u6709\u7684\u53c2\u6570\u90fd\u9700\u8981\u786e\u5b9a\u5176\u503c\u3002\u56e0\u6b64\u5728\u4ee3\u7801\u4e2d\uff0ca++\u64cd\u4f5c\u662f\u5728defer\u51fd\u6570\u6ce8\u518c\u4e4b\u540e\u6267\u884c\u7684\u3002,\u5728\u7b2c\u4e00\u4e2adefer\u51fd\u6570\u4e2d\uff0cfunc(a int) { fmt.println(a) }\uff0c\u53c2\u6570a\u5728\u6ce8\u518c\u65f6\u88ab\u8d4b\u503c\u4e3a\u6b64\u65f6\u7684\u5b9e\u53c2a=1\u3002\u968f\u540e\u6267\u884c\u8f93\u51fa1\u3002,\u5728\u7b2c\u4e8c\u4e2adefer\u51fd\u6570\u4e2d\uff0cfmt.println(a)\uff0c\u53c2\u6570a\u4e5f\u540c\u6837\u5728\u6ce8\u518c\u65f6\u88ab\u8d4b\u503c\u4e3a\u6b64\u65f6\u7684\u5b9e\u53c2a=1\u3002,\u5728\u7b2c\u4e09\u4e2adefer\u51fd\u6570\u4e2d\uff0c\u65e0\u53c2\u51fd\u6570\uff0c\u6267\u884c\u65f6\u5148\u4e0a\u5bfb\u627e\u53c2\u6570a\uff08\u6b64\u65f6\u4e3a2\uff09\u3002,\u672c\u7bc7\u5173\u4e8e\u300aGo defer \u8bed\u53e5\u6267\u884c\u987a\u5e8f\uff1a\u4e3a\u4ec0\u4e48\u4ee3\u7801\u8f93\u51fa 221\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGOLANG\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01,go\u6253\u5370defer\u5206\u6790,\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aGo defer \u8bed\u53e5\u6267\u884c\u987a\u5e8f\uff1a\u4e3a\u4ec0\u4e48\u4ee3\u7801\u8f93\u51fa 221\uff1f\u300b<\/span>\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\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 defer \u8bed\u53e5\u6267\u884c\u987a\u5e8f\uff1a\u4e3a\u4ec0\u4e48\u4ee3\u7801\u8f93\u51fa 221\uff1f<\/span><\/p>\n<h1>Go defer \u8bed\u53e5\u6267\u884c\u987a\u5e8f\uff1a\u4e3a\u4ec0\u4e48\u4ee3\u7801\u8f93\u51fa 221\uff1f<\/h1>\n<p><span>2024-11-03 11:54:44<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aGo defer \u8bed\u53e5\u6267\u884c\u987a\u5e8f\uff1a\u4e3a\u4ec0\u4e48\u4ee3\u7801\u8f93\u51fa 221\uff1f\u300b<\/span>\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241103\/17306060696726f3f531795.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>go\u6253\u5370defer\u5206\u6790<\/strong><\/p>\n<p>\u5728\u4ee5\u4e0b\u4ee3\u7801\u4e2d\uff1a<\/p>\n<pre>package main\n\nimport \"fmt\"\n\nfunc main() {\n  a := 1\n  defer fmt.println(a)\n  a++\n  defer fmt.println(a)\n  defer func(a int) { fmt.println(a) }(a)\n}<\/pre>\n<p>\u7a0b\u5e8f\u7684\u6253\u5370\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>2\n2\n1<\/pre>\n<p><strong>\u7406\u89e3\u6253\u5370\u987a\u5e8f<\/strong><\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u6d89\u53ca\u5230go\u8bed\u8a00\u4e2ddefer\u5173\u952e\u5b57\u7684\u4f7f\u7528\u3002defer\u6307\u5ef6\u8fdf\u6267\u884c\u7684\u610f\u601d\uff0c\u5373\u5728\u5f53\u524d\u51fd\u6570\u8fd4\u56de\u524d\u6267\u884cdefer\u540e\u9762\u7684\u51fd\u6570\u3002<\/p>\n<p>defwer\u51fd\u6570\u9075\u5faa\u540e\u8fdb\u5148\u51fa\u7684\u539f\u5219\uff0c\u56e0\u6b64\u6267\u884c\u987a\u5e8f\u4e3a\uff1a<\/p>\n<ol>\n<li>func(a int) { fmt.println(a) }<\/li>\n<li>fmt.println(a)<\/li>\n<li>fmt.println(a)<\/li>\n<\/ol>\n<p><strong>\u7406\u89e3\u53c2\u6570\u4f20\u9012<\/strong><\/p>\n<p>defwer\u6ce8\u518c\u8981\u5ef6\u8fdf\u6267\u884c\u7684\u51fd\u6570\u65f6\uff0c\u8be5\u51fd\u6570\u6240\u6709\u7684\u53c2\u6570\u90fd\u9700\u8981\u786e\u5b9a\u5176\u503c\u3002\u56e0\u6b64\u5728\u4ee3\u7801\u4e2d\uff0ca++\u64cd\u4f5c\u662f\u5728defer\u51fd\u6570\u6ce8\u518c\u4e4b\u540e\u6267\u884c\u7684\u3002<\/p>\n<p>\u5728\u7b2c\u4e00\u4e2adefer\u51fd\u6570\u4e2d\uff0cfunc(a int) { fmt.println(a) }\uff0c\u53c2\u6570a\u5728\u6ce8\u518c\u65f6\u88ab\u8d4b\u503c\u4e3a\u6b64\u65f6\u7684\u5b9e\u53c2a=1\u3002\u968f\u540e\u6267\u884c\u8f93\u51fa1\u3002<\/p>\n<p>\u5728\u7b2c\u4e8c\u4e2adefer\u51fd\u6570\u4e2d\uff0cfmt.println(a)\uff0c\u53c2\u6570a\u4e5f\u540c\u6837\u5728\u6ce8\u518c\u65f6\u88ab\u8d4b\u503c\u4e3a\u6b64\u65f6\u7684\u5b9e\u53c2a=1\u3002<\/p>\n<p>\u5728\u7b2c\u4e09\u4e2adefer\u51fd\u6570\u4e2d\uff0c\u65e0\u53c2\u51fd\u6570\uff0c\u6267\u884c\u65f6\u5148\u4e0a\u5bfb\u627e\u53c2\u6570a\uff08\u6b64\u65f6\u4e3a2\uff09\u3002<\/p>\n<p>\u672c\u7bc7\u5173\u4e8e\u300aGo defer \u8bed\u53e5\u6267\u884c\u987a\u5e8f\uff1a\u4e3a\u4ec0\u4e48\u4ee3\u7801\u8f93\u51fa 221\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGOLANG\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u79fb\u52a8\u7aef\u65e5\u671f\u9009\u62e9\u5982\u4f55\u5b9e\u73b0\u5de6\u53f3\u6ed1\u52a8\u5207\u6362\u6548\u679c\uff1f\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   JDBC\u8fde\u63a5\u6570\u636e\u5e93\u65f6\u9047\u5230\u201c\u5e93\u540d\u9519\u8bef\u201d\u5982\u4f55\u89e3\u51b3\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5&#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-206095","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206095","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=206095"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206095\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206095"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206095"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}