{"id":57788,"date":"2024-10-10T21:09:32","date_gmt":"2024-10-10T13:09:32","guid":{"rendered":"https:\/\/server.hk\/cnblog\/57788\/"},"modified":"2024-10-10T21:09:32","modified_gmt":"2024-10-10T13:09:32","slug":"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80%e9%a1%9e%e5%9e%8b%e5%88%86%e6%94%af%ef%bc%88switch-%e5%88%a4%e6%96%b7%e7%a9%ba%e6%8e%a5%e5%8f%a3%e4%b8%ad%e8%ae%8a%e9%87%8f%e7%9a%84%e9%a1%9e%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/57788\/","title":{"rendered":"GO\u6559\u7a0b: Go \u8a9e\u8a00\u985e\u578b\u5206\u652f\uff08switch \u5224\u65b7\u7a7a\u63a5\u53e3\u4e2d\u8b8a\u91cf\u7684\u985e\u578b\uff09"},"content":{"rendered":"<h1 id=\"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80%e9%a1%9e%e5%9e%8b%e5%88%86%e6%94%af%ef%bc%88switch-%e5%88%a4%e6%96%b7%e7%a9%ba%e6%8e%a5%e5%8f%a3%e4%b8%ad%e8%ae%8a%e9%87%8f%e7%9a%84%e9%a1%9e%e5%9e%8b-NFCzVwqYOy\">GO\u6559\u7a0b: Go \u8a9e\u8a00\u985e\u578b\u5206\u652f\uff08switch \u5224\u65b7\u7a7a\u63a5\u53e3\u4e2d\u8b8a\u91cf\u7684\u985e\u578b\uff09<\/h1>\n<p>\u5728 Go \u8a9e\u8a00\u4e2d\uff0c\u7a7a\u63a5\u53e3\uff08interface{}\uff09\u662f\u4e00\u500b\u975e\u5e38\u9748\u6d3b\u7684\u985e\u578b\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u63a5\u53d7\u4efb\u4f55\u985e\u578b\u7684\u503c\u3002\u7136\u800c\uff0c\u7576\u6211\u5011\u9700\u8981\u6839\u64da\u9019\u4e9b\u503c\u7684\u5177\u9ad4\u985e\u578b\u9032\u884c\u4e0d\u540c\u7684\u8655\u7406\u6642\uff0c\u4f7f\u7528 <code>switch<\/code> \u8a9e\u53e5\u4f86\u5224\u65b7\u8b8a\u91cf\u7684\u985e\u578b\u662f\u4e00\u500b\u975e\u5e38\u6709\u6548\u7684\u65b9\u5f0f\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728 Go \u8a9e\u8a00\u4e2d\u4f7f\u7528 <code>switch<\/code> \u4f86\u5224\u65b7\u7a7a\u63a5\u53e3\u4e2d\u7684\u8b8a\u91cf\u985e\u578b\u3002<\/p>\n<h2 id=\"%e7%a9%ba%e6%8e%a5%e5%8f%a3%e7%9a%84%e6%a6%82%e5%bf%b5-NFCzVwqYOy\">\u7a7a\u63a5\u53e3\u7684\u6982\u5ff5<\/h2>\n<p>\u5728 Go \u8a9e\u8a00\u4e2d\uff0c\u7a7a\u63a5\u53e3\u662f\u4e00\u500b\u4e0d\u5305\u542b\u4efb\u4f55\u65b9\u6cd5\u7684\u63a5\u53e3\u3002\u9019\u610f\u5473\u8457\u4efb\u4f55\u985e\u578b\u90fd\u53ef\u4ee5\u5be6\u73fe\u9019\u500b\u63a5\u53e3\uff0c\u56e0\u6b64\u7a7a\u63a5\u53e3\u53ef\u4ee5\u7528\u4f86\u5b58\u5132\u4efb\u4f55\u985e\u578b\u7684\u6578\u64da\u3002\u9019\u5728\u8655\u7406\u4e0d\u78ba\u5b9a\u985e\u578b\u7684\u6578\u64da\u6642\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u5728 JSON \u89e3\u78bc\u6216\u8655\u7406\u591a\u7a2e\u6578\u64da\u985e\u578b\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-switch-%e5%88%a4%e6%96%b7%e9%a1%9e%e5%9e%8b-NFCzVwqYOy\">\u4f7f\u7528 switch \u5224\u65b7\u985e\u578b<\/h2>\n<p>\u7576\u6211\u5011\u6709\u4e00\u500b\u7a7a\u63a5\u53e3\u7684\u8b8a\u91cf\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>switch<\/code> \u8a9e\u53e5\u4f86\u5224\u65b7\u5176\u5177\u9ad4\u985e\u578b\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u7c21\u6f54\uff0c\u800c\u4e14\u6613\u65bc\u95b1\u8b80\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>package main\n\nimport (\n    \"fmt\"\n)\n\nfunc main() {\n    var i interface{} = \"Hello, Go!\"\n\n    switch v := i.(type) {\n    case nil:\n        fmt.Println(\"i \u662f nil\")\n    case int:\n        fmt.Println(\"i \u662f\u6574\u6578:\", v)\n    case string:\n        fmt.Println(\"i \u662f\u5b57\u7b26\u4e32:\", v)\n    case bool:\n        fmt.Println(\"i \u662f\u5e03\u723e\u503c:\", v)\n    default:\n        fmt.Println(\"i \u662f\u5176\u4ed6\u985e\u578b:\", v)\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5c07\u4e00\u500b\u5b57\u7b26\u4e32\u8ce6\u503c\u7d66\u7a7a\u63a5\u53e3\u8b8a\u91cf <code>i<\/code>\u3002\u7136\u5f8c\uff0c\u6211\u5011\u4f7f\u7528 <code>switch<\/code> \u8a9e\u53e5\u4f86\u5224\u65b7 <code>i<\/code> \u7684\u5177\u9ad4\u985e\u578b\u3002\u6bcf\u500b <code>case<\/code> \u90fd\u6aa2\u67e5 <code>i<\/code> \u662f\u5426\u70ba\u7279\u5b9a\u985e\u578b\uff0c\u4e26\u5728\u5339\u914d\u6642\u57f7\u884c\u76f8\u61c9\u7684\u4ee3\u78bc\u584a\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-switch-%e7%9a%84%e5%84%aa%e5%8b%a2-NFCzVwqYOy\">\u4f7f\u7528 switch \u7684\u512a\u52e2<\/h2>\n<p>\u4f7f\u7528 <code>switch<\/code> \u5224\u65b7\u985e\u578b\u6709\u5e7e\u500b\u512a\u52e2\uff1a<\/p>\n<ul>\n<li><strong>\u53ef\u8b80\u6027\uff1a<\/strong> <code>switch<\/code> \u8a9e\u53e5\u7684\u7d50\u69cb\u6e05\u6670\uff0c\u6613\u65bc\u7406\u89e3\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong> \u53ef\u4ee5\u8f15\u9b06\u64f4\u5c55\u4ee5\u8655\u7406\u66f4\u591a\u985e\u578b\u3002<\/li>\n<li><strong>\u6027\u80fd\uff1a<\/strong> \u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c<code>switch<\/code> \u7684\u6027\u80fd\u53ef\u80fd\u512a\u65bc\u591a\u500b <code>if<\/code> \u8a9e\u53e5\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-NFCzVwqYOy\">\u5be6\u969b\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u5728\u5be6\u969b\u958b\u767c\u4e2d\uff0c\u4f7f\u7528 <code>switch<\/code> \u5224\u65b7\u7a7a\u63a5\u53e3\u7684\u985e\u578b\u53ef\u4ee5\u61c9\u7528\u65bc\u8a31\u591a\u5834\u666f\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u8655\u7406 JSON \u6578\u64da\u6642\uff0c\u6839\u64da\u4e0d\u540c\u7684\u6578\u64da\u985e\u578b\u9032\u884c\u4e0d\u540c\u7684\u8655\u7406\u3002<\/li>\n<li>\u5728\u51fd\u6578\u4e2d\u63a5\u6536\u591a\u7a2e\u4e0d\u540c\u985e\u578b\u7684\u53c3\u6578\uff0c\u4e26\u6839\u64da\u985e\u578b\u57f7\u884c\u76f8\u61c9\u7684\u908f\u8f2f\u3002<\/li>\n<li>\u5728\u932f\u8aa4\u8655\u7406\u6642\uff0c\u6839\u64da\u932f\u8aa4\u7684\u5177\u9ad4\u985e\u578b\u9032\u884c\u4e0d\u540c\u7684\u8655\u7406\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-NFCzVwqYOy\">\u7e3d\u7d50<\/h2>\n<p>\u5728 Go \u8a9e\u8a00\u4e2d\uff0c\u4f7f\u7528 <code>switch<\/code> \u8a9e\u53e5\u4f86\u5224\u65b7\u7a7a\u63a5\u53e3\u4e2d\u7684\u8b8a\u91cf\u985e\u578b\u662f\u4e00\u7a2e\u9ad8\u6548\u4e14\u6613\u65bc\u7dad\u8b77\u7684\u65b9\u5f0f\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u63d0\u9ad8\u4e86\u4ee3\u78bc\u7684\u53ef\u8b80\u6027\uff0c\u9084\u4f7f\u5f97\u8655\u7406\u591a\u7a2e\u6578\u64da\u985e\u578b\u8b8a\u5f97\u66f4\u52a0\u7c21\u55ae\u3002\u7121\u8ad6\u662f\u5728\u8655\u7406 JSON \u6578\u64da\u9084\u662f\u9032\u884c\u932f\u8aa4\u8655\u7406\uff0c\u9019\u7a2e\u6280\u8853\u90fd\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f\u500b\u4eba\u9805\u76ee\u9084\u662f\u4f01\u696d\u61c9\u7528\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 Go \u8a9e\u8a00\u4e2d\u7684 switch \u8a9e\u53e5\uff0c\u5b78\u7fd2\u5982\u4f55\u5224\u65b7\u7a7a\u63a5\u53e3\u4e2d\u7684\u8b8a\u91cf\u985e\u578b\uff0c\u63d0\u5347\u4f60\u7684\u7de8\u7a0b\u6280\u5de7\u8207\u6548\u7387\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-57788","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57788","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=57788"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57788\/revisions"}],"predecessor-version":[{"id":57789,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57788\/revisions\/57789"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=57788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=57788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=57788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}