{"id":205853,"date":"2025-06-12T10:56:37","date_gmt":"2025-06-12T02:56:37","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205853\/"},"modified":"2025-06-12T10:56:37","modified_gmt":"2025-06-12T02:56:37","slug":"go-%e4%b8%ad-defer-%e7%9a%84%e6%89%a7%e8%a1%8c%e9%a1%ba%e5%ba%8f%ef%bc%9a%e5%90%8e%e8%bf%9b%e5%85%88%e5%87%ba%ef%bc%8c%e4%bd%86%e5%8f%82%e6%95%b0%e5%80%bc%e6%98%af%e5%a6%82%e4%bd%95%e7%a1%ae%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205853\/","title":{"rendered":"Go \u4e2d defer \u7684\u6267\u884c\u987a\u5e8f\uff1a\u540e\u8fdb\u5148\u51fa\uff0c\u4f46\u53c2\u6570\u503c\u662f\u5982\u4f55\u786e\u5b9a\u7684\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 \u4e2d defer \u7684\u6267\u884c\u987a\u5e8f\uff1a\u540e\u8fdb\u5148\u51fa\uff0c\u4f46\u53c2\u6570\u503c\u662f\u5982\u4f55\u786e\u5b9a\u7684\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\/20241027\/1730019639671e01370869d.jpg\" class=\"aligncenter\">,<br \/>\n<strong>go\u4e2ddefer\u7684\u6267\u884c\u987a\u5e8f<\/strong>,\u5728go\u8bed\u8a00\u4e2d\uff0cdefer\u662f\u4e00\u79cd\u5ef6\u8fdf\u6267\u884c\u51fd\u6570\u7684\u673a\u5236\u3002\u5bf9\u4e8e\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u5927\u5bb6\u53ef\u4ee5\u601d\u8003\u4e00\u4e0b\u5176\u6253\u5370\u7ed3\u679c\uff1a,<br \/>\n<strong>\u7b54\u6848\uff1a<\/strong>,\u540c\u4e3a\u65b0\u624b\uff0c\u4e2a\u4eba\u7406\u89e3\uff1a,\u4eca\u5929\u5173\u4e8e\u300aGo \u4e2d defer \u7684\u6267\u884c\u987a\u5e8f\uff1a\u540e\u8fdb\u5148\u51fa\uff0c\u4f46\u53c2\u6570\u503c\u662f\u5982\u4f55\u786e\u5b9a\u7684\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728GOLANG\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01,<br \/>\n<strong>\u5176\u6b21\uff0c<\/strong>defer\u6ce8\u518c\u5ef6\u8fdf\u6267\u884c\u51fd\u6570\u65f6\uff0c\u51fd\u6570\u6240\u9700\u7684\u53c2\u6570\u503c\u5fc5\u987b\u786e\u5b9a\u3002,<br \/>\n<strong>\u9996\u5148\uff0c<\/strong>defer\u9075\u5faa\u540e\u8fdb\u5148\u51fa\u7684\u539f\u5219\uff0c\u56e0\u6b64\u6253\u5370\u987a\u5e8f\u4e3a3\u30012\u30011\u3002,<\/p>\n<p><strong>\u9010\u884c\u5206\u6790\u4ee3\u7801\u6267\u884c\u8fc7\u7a0b\uff1a<\/strong><\/p>\n<ul>\n<li>\u521d\u59cb\u5316 a \u4e3a 1\u3002<\/li>\n<li>\u4f9d\u6b21\u6ce8\u518c3\u4e2adefer\u51fd\u6570\uff0c\u5176\u4e2d\u51fd\u6570\u9700\u8981\u53c2\u6570\u7684\u503c\u5728\u6ce8\u518c\u65f6\u5c31\u786e\u5b9a\u3002<\/li>\n<li>\u6267\u884c a++\uff0c\u4f7f a \u4e3a 2\u3002<\/li>\n<li>\n<p>\u8fd4\u56de\u524d\u6309\u5e8f\u6267\u884cdefer\u51fd\u6570\uff1a<\/p>\n<ul>\n<li>\u51fd\u65703\uff1a\u4f20\u5165\u5b9e\u53c2 a=1\uff0c\u5728\u6ce8\u518c\u65f6\u5206\u914d\u5185\u5b58\u5b58\u50a8\u5f62\u53c2 a&#8217;\u3002\u51fd\u6570\u6267\u884c\u65f6\uff0c\u6253\u5370 1\u3002<\/li>\n<li>\u51fd\u65702\uff1a\u540c\u4e0a\u3002<\/li>\n<li>\u51fd\u65701\uff1a\u65e0\u53c2\u51fd\u6570\uff0c\u6ce8\u518c\u65f6\u4e0d\u5206\u914d\u5185\u5b58\u3002\u51fd\u6570\u6267\u884c\u65f6\uff0c\u67e5\u627e\u53c2\u6570 a\uff08\u6b64\u65f6\u4e3a 2\uff09\uff0c\u6253\u5370 2\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\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 \u4e2d defer \u7684\u6267\u884c\u987a\u5e8f\uff1a\u540e\u8fdb\u5148\u51fa\uff0c\u4f46\u53c2\u6570\u503c\u662f\u5982\u4f55\u786e\u5b9a\u7684\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 \u4e2d defer \u7684\u6267\u884c\u987a\u5e8f\uff1a\u540e\u8fdb\u5148\u51fa\uff0c\u4f46\u53c2\u6570\u503c\u662f\u5982\u4f55\u786e\u5b9a\u7684\uff1f<\/span><\/p>\n<h1>Go \u4e2d defer \u7684\u6267\u884c\u987a\u5e8f\uff1a\u540e\u8fdb\u5148\u51fa\uff0c\u4f46\u53c2\u6570\u503c\u662f\u5982\u4f55\u786e\u5b9a\u7684\uff1f<\/h1>\n<p><span>2024-10-27 17:00:54<\/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 \u4e2d defer \u7684\u6267\u884c\u987a\u5e8f\uff1a\u540e\u8fdb\u5148\u51fa\uff0c\u4f46\u53c2\u6570\u503c\u662f\u5982\u4f55\u786e\u5b9a\u7684\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\/20241027\/1730019639671e01370869d.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>go\u4e2ddefer\u7684\u6267\u884c\u987a\u5e8f<\/strong><\/p>\n<p>\u5728go\u8bed\u8a00\u4e2d\uff0cdefer\u662f\u4e00\u79cd\u5ef6\u8fdf\u6267\u884c\u51fd\u6570\u7684\u673a\u5236\u3002\u5bf9\u4e8e\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u5927\u5bb6\u53ef\u4ee5\u601d\u8003\u4e00\u4e0b\u5176\u6253\u5370\u7ed3\u679c\uff1a<\/p>\n<pre>func main() {\n    a := 1\n    defer fmt.Println(a)\n    defer func(s int) { fmt.Println(s) }(a)\n    defer func() { fmt.Println(\"normal defer\") }()\n    a++\n}<\/pre>\n<p><strong>\u7b54\u6848\uff1a<\/strong><\/p>\n<p>\u540c\u4e3a\u65b0\u624b\uff0c\u4e2a\u4eba\u7406\u89e3\uff1a<\/p>\n<ul>\n<li><strong>\u9996\u5148\uff0c<\/strong>defer\u9075\u5faa\u540e\u8fdb\u5148\u51fa\u7684\u539f\u5219\uff0c\u56e0\u6b64\u6253\u5370\u987a\u5e8f\u4e3a3\u30012\u30011\u3002<\/li>\n<li><strong>\u5176\u6b21\uff0c<\/strong>defer\u6ce8\u518c\u5ef6\u8fdf\u6267\u884c\u51fd\u6570\u65f6\uff0c\u51fd\u6570\u6240\u9700\u7684\u53c2\u6570\u503c\u5fc5\u987b\u786e\u5b9a\u3002<\/li>\n<li>\n<p><strong>\u9010\u884c\u5206\u6790\u4ee3\u7801\u6267\u884c\u8fc7\u7a0b\uff1a<\/strong><\/p>\n<ul>\n<li>\u521d\u59cb\u5316 a \u4e3a 1\u3002<\/li>\n<li>\u4f9d\u6b21\u6ce8\u518c3\u4e2adefer\u51fd\u6570\uff0c\u5176\u4e2d\u51fd\u6570\u9700\u8981\u53c2\u6570\u7684\u503c\u5728\u6ce8\u518c\u65f6\u5c31\u786e\u5b9a\u3002<\/li>\n<li>\u6267\u884c a++\uff0c\u4f7f a \u4e3a 2\u3002<\/li>\n<li>\n<p>\u8fd4\u56de\u524d\u6309\u5e8f\u6267\u884cdefer\u51fd\u6570\uff1a<\/p>\n<ul>\n<li>\u51fd\u65703\uff1a\u4f20\u5165\u5b9e\u53c2 a=1\uff0c\u5728\u6ce8\u518c\u65f6\u5206\u914d\u5185\u5b58\u5b58\u50a8\u5f62\u53c2 a&#8217;\u3002\u51fd\u6570\u6267\u884c\u65f6\uff0c\u6253\u5370 1\u3002<\/li>\n<li>\u51fd\u65702\uff1a\u540c\u4e0a\u3002<\/li>\n<li>\u51fd\u65701\uff1a\u65e0\u53c2\u51fd\u6570\uff0c\u6ce8\u518c\u65f6\u4e0d\u5206\u914d\u5185\u5b58\u3002\u51fd\u6570\u6267\u884c\u65f6\uff0c\u67e5\u627e\u53c2\u6570 a\uff08\u6b64\u65f6\u4e3a 2\uff09\uff0c\u6253\u5370 2\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u4eca\u5929\u5173\u4e8e\u300aGo \u4e2d defer \u7684\u6267\u884c\u987a\u5e8f\uff1a\u540e\u8fdb\u5148\u51fa\uff0c\u4f46\u53c2\u6570\u503c\u662f\u5982\u4f55\u786e\u5b9a\u7684\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728GOLANG\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   PHP\u51fd\u6570\u5982\u4f55\u63a5\u6536\u5bf9\u8c61\u53c2\u6570\uff1f\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   CSS \u52a8\u753b\u4e2d\u5982\u4f55\u5b9e\u73b0\u7a81\u53d8\u6548\u679c\uff1f\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-205853","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205853","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=205853"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205853\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205853"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205853"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}