{"id":57720,"date":"2024-10-10T20:37:30","date_gmt":"2024-10-10T12:37:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/57720\/"},"modified":"2024-10-10T20:37:30","modified_gmt":"2024-10-10T12:37:30","slug":"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80%e5%ae%95%e6%a9%9f%ef%bc%88panic%ef%bc%89-%e7%a8%8b%e5%ba%8f%e7%b5%82%e6%ad%a2%e9%81%8b%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/57720\/","title":{"rendered":"GO\u6559\u7a0b: Go \u8a9e\u8a00\u5b95\u6a5f\uff08panic\uff09\u2014\u2014\u7a0b\u5e8f\u7d42\u6b62\u904b\u884c"},"content":{"rendered":"<h1 id=\"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80%e5%ae%95%e6%a9%9f%ef%bc%88panic%ef%bc%89-%e7%a8%8b%e5%ba%8f%e7%b5%82%e6%ad%a2%e9%81%8b%e8%a1%8c-iIccOUiRoa\">GO\u6559\u7a0b: Go \u8a9e\u8a00\u5b95\u6a5f\uff08panic\uff09\u2014\u2014\u7a0b\u5e8f\u7d42\u6b62\u904b\u884c<\/h1>\n<p>\u5728 Go \u8a9e\u8a00\u4e2d\uff0c\u5b95\u6a5f\uff08panic\uff09\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u932f\u8aa4\u8655\u7406\u6a5f\u5236\uff0c\u7576\u7a0b\u5e8f\u9047\u5230\u7121\u6cd5\u6062\u5fa9\u7684\u932f\u8aa4\u6642\uff0c\u6703\u89f8\u767c\u5b95\u6a5f\uff0c\u5c0e\u81f4\u7a0b\u5e8f\u7d42\u6b62\u904b\u884c\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e Go \u8a9e\u8a00\u4e2d\u7684\u5b95\u6a5f\u6a5f\u5236\uff0c\u5305\u62ec\u5176\u539f\u56e0\u3001\u5982\u4f55\u8655\u7406\u4ee5\u53ca\u4e00\u4e9b\u5be6\u969b\u7684\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%ae%95%e6%a9%9f%ef%bc%88panic%ef%bc%89-iIccOUiRoa\">\u4ec0\u9ebc\u662f\u5b95\u6a5f\uff08panic\uff09<\/h2>\n<p>\u5b95\u6a5f\u662f Go \u8a9e\u8a00\u4e2d\u7684\u4e00\u7a2e\u904b\u884c\u6642\u932f\u8aa4\uff0c\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u8a2a\u554f nil \u6307\u91dd<\/li>\n<li>\u6578\u7d44\u8d8a\u754c<\/li>\n<li>\u4f7f\u7528\u4e0d\u6b63\u78ba\u7684\u985e\u578b\u9032\u884c\u985e\u578b\u8f49\u63db<\/li>\n<li>\u624b\u52d5\u8abf\u7528 panic \u51fd\u6578<\/li>\n<\/ul>\n<p>\u7576\u767c\u751f\u5b95\u6a5f\u6642\uff0cGo \u8a9e\u8a00\u6703\u505c\u6b62\u7576\u524d\u7684 goroutine\uff0c\u4e26\u958b\u59cb\u5411\u4e0a\u5c64\u8abf\u7528\u5806\u68e7\u56de\u6eaf\uff0c\u76f4\u5230\u627e\u5230\u8655\u7406\u8a72\u932f\u8aa4\u7684 defer \u8a9e\u53e5\u6216\u7a0b\u5e8f\u7d42\u6b62\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e8%a7%b8%e7%99%bc%e5%ae%95%e6%a9%9f-iIccOUiRoa\">\u5982\u4f55\u89f8\u767c\u5b95\u6a5f<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u89f8\u767c\u5b95\u6a5f\uff1a<\/p>\n<pre><code>package main\n\nimport \"fmt\"\n\nfunc main() {\n    var a *int\n    fmt.Println(*a) \/\/ \u9019\u88e1\u6703\u89f8\u767c\u5b95\u6a5f\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u8b8a\u91cf a \u662f\u4e00\u500b nil \u6307\u91dd\uff0c\u7576\u6211\u5011\u5617\u8a66\u89e3\u5f15\u7528\u5b83\u6642\uff0c\u7a0b\u5e8f\u5c07\u6703\u5b95\u6a5f\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86%e5%ae%95%e6%a9%9f-iIccOUiRoa\">\u5982\u4f55\u8655\u7406\u5b95\u6a5f<\/h2>\n<p>\u96d6\u7136\u5b95\u6a5f\u6703\u5c0e\u81f4\u7a0b\u5e8f\u7d42\u6b62\uff0c\u4f46\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 defer \u8a9e\u53e5\u4f86\u6355\u7372\u548c\u8655\u7406\u5b83\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>package main\n\nimport \"fmt\"\n\nfunc recoverPanic() {\n    if r := recover(); r != nil {\n        fmt.Println(\"\u6355\u7372\u5230\u5b95\u6a5f:\", r)\n    }\n}\n\nfunc main() {\n    defer recoverPanic() \/\/ \u5728 main \u51fd\u6578\u4e2d\u4f7f\u7528 defer \u6355\u7372\u5b95\u6a5f\n    var a *int\n    fmt.Println(*a) \/\/ \u9019\u88e1\u6703\u89f8\u767c\u5b95\u6a5f\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b recoverPanic \u51fd\u6578\uff0c\u4e26\u5728 main \u51fd\u6578\u4e2d\u4f7f\u7528 defer \u8a9e\u53e5\u4f86\u78ba\u4fdd\u5b83\u5728\u7a0b\u5e8f\u7d50\u675f\u524d\u57f7\u884c\u3002\u7576\u5b95\u6a5f\u767c\u751f\u6642\uff0crecover \u51fd\u6578\u5c07\u6355\u7372\u932f\u8aa4\uff0c\u4e26\u9632\u6b62\u7a0b\u5e8f\u7d42\u6b62\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%ae%95%e6%a9%9f%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-iIccOUiRoa\">\u4f7f\u7528\u5b95\u6a5f\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136\u5b95\u6a5f\u548c\u6062\u5fa9\u6a5f\u5236\u63d0\u4f9b\u4e86\u4e00\u7a2e\u8655\u7406\u932f\u8aa4\u7684\u65b9\u5f0f\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u61c9\u8b39\u614e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6ce8\u610f\u4e8b\u9805\uff1a<\/p>\n<ul>\n<li>\u4e0d\u61c9\u8a72\u5c07\u5b95\u6a5f\u8996\u70ba\u5e38\u898f\u932f\u8aa4\u8655\u7406\u65b9\u5f0f\uff0c\u61c9\u8a72\u7528\u65bc\u7121\u6cd5\u6062\u5fa9\u7684\u932f\u8aa4\u3002<\/li>\n<li>\u5728\u751f\u7522\u74b0\u5883\u4e2d\uff0c\u61c9\u8a72\u907f\u514d\u4f7f\u7528 panic\uff0c\u56e0\u70ba\u5b83\u6703\u5c0e\u81f4\u7a0b\u5e8f\u7684\u975e\u9810\u671f\u7d42\u6b62\u3002<\/li>\n<li>\u61c9\u8a72\u5728\u9069\u7576\u7684\u5730\u65b9\u4f7f\u7528 defer \u4f86\u6355\u7372\u548c\u8655\u7406\u5b95\u6a5f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-iIccOUiRoa\">\u7e3d\u7d50<\/h2>\n<p>Go \u8a9e\u8a00\u4e2d\u7684\u5b95\u6a5f\uff08panic\uff09\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u932f\u8aa4\u8655\u7406\u6a5f\u5236\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u6355\u7372\u7121\u6cd5\u6062\u5fa9\u7684\u932f\u8aa4\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528 defer \u548c recover\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u7a0b\u5e8f\u4e2d\u7684\u932f\u8aa4\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5d29\u6f70\u3002\u4e86\u89e3\u9019\u4e9b\u6a5f\u5236\u5c0d\u65bc\u958b\u767c\u7a69\u5b9a\u7684\u61c9\u7528\u7a0b\u5e8f\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u5176\u4ed6\u96f2\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Go\u8a9e\u8a00\u4e2d\u7684\u5b95\u6a5f\uff08panic\uff09\u6a5f\u5236\uff0c\u5b78\u7fd2\u5982\u4f55\u8655\u7406\u7a0b\u5e8f\u7d42\u6b62\u904b\u884c\u7684\u60c5\u6cc1\uff0c\u63d0\u5347\u932f\u8aa4\u8655\u7406\u80fd\u529b\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-57720","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57720","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=57720"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57720\/revisions"}],"predecessor-version":[{"id":57721,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57720\/revisions\/57721"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=57720"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=57720"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=57720"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}