{"id":57880,"date":"2024-10-10T21:54:18","date_gmt":"2024-10-10T13:54:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/57880\/"},"modified":"2024-10-10T21:54:18","modified_gmt":"2024-10-10T13:54:18","slug":"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80%e9%a1%9e%e5%9e%8b%e6%96%b7%e8%a8%80%e7%b0%a1%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/57880\/","title":{"rendered":"GO\u6559\u7a0b: Go \u8a9e\u8a00\u985e\u578b\u65b7\u8a00\u7c21\u8ff0"},"content":{"rendered":"<h1 id=\"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80%e9%a1%9e%e5%9e%8b%e6%96%b7%e8%a8%80%e7%b0%a1%e8%bf%b0-rRgmMTALsS\">GO\u6559\u7a0b: Go \u8a9e\u8a00\u985e\u578b\u65b7\u8a00\u7c21\u8ff0<\/h1>\n<p>Go \u8a9e\u8a00\u662f\u4e00\u7a2e\u975c\u614b\u985e\u578b\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u985e\u578b\u7cfb\u7d71\u548c\u7c21\u6f54\u7684\u8a9e\u6cd5\u3002\u5728 Go \u8a9e\u8a00\u4e2d\uff0c\u985e\u578b\u65b7\u8a00\u662f\u4e00\u500b\u91cd\u8981\u7684\u7279\u6027\uff0c\u5141\u8a31\u958b\u767c\u8005\u5728\u904b\u884c\u6642\u6aa2\u67e5\u548c\u8f49\u63db\u63a5\u53e3\u985e\u578b\u7684\u5177\u9ad4\u5be6\u73fe\u3002\u672c\u6587\u5c07\u7c21\u8981\u4ecb\u7d39 Go \u8a9e\u8a00\u4e2d\u7684\u985e\u578b\u65b7\u8a00\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u4f86\u5e6b\u52a9\u7406\u89e3\u5176\u7528\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e9%a1%9e%e5%9e%8b%e6%96%b7%e8%a8%80%ef%bc%9f-rRgmMTALsS\">\u4ec0\u9ebc\u662f\u985e\u578b\u65b7\u8a00\uff1f<\/h2>\n<p>\u985e\u578b\u65b7\u8a00\u662f Go \u8a9e\u8a00\u4e2d\u7528\u4f86\u6aa2\u67e5\u63a5\u53e3\u985e\u578b\u7684\u5177\u9ad4\u5be6\u73fe\u7684\u4e00\u7a2e\u8a9e\u6cd5\u3002\u5b83\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>value, ok := interfaceValue.(ConcreteType)<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>interfaceValue<\/code> \u662f\u4e00\u500b\u63a5\u53e3\u985e\u578b\u7684\u8b8a\u91cf\uff0c<code>ConcreteType<\/code> \u662f\u4f60\u5e0c\u671b\u6aa2\u67e5\u7684\u5177\u9ad4\u985e\u578b\u3002\u5982\u679c <code>interfaceValue<\/code> \u5be6\u969b\u4e0a\u662f <code>ConcreteType<\/code> \u7684\u4e00\u500b\u5be6\u4f8b\uff0c\u5247 <code>ok<\/code> \u5c07\u70ba <code>true<\/code>\uff0c\u4e26\u4e14 <code>value<\/code> \u5c07\u5305\u542b\u8f49\u63db\u5f8c\u7684\u503c\uff1b\u5426\u5247\uff0c<code>ok<\/code> \u5c07\u70ba <code>false<\/code>\uff0c<code>value<\/code> \u5c07\u70ba\u8a72\u985e\u578b\u7684\u96f6\u503c\u3002<\/p>\n<h2 id=\"%e9%a1%9e%e5%9e%8b%e6%96%b7%e8%a8%80%e7%9a%84%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-rRgmMTALsS\">\u985e\u578b\u65b7\u8a00\u7684\u4f7f\u7528\u5834\u666f<\/h2>\n<p>\u985e\u578b\u65b7\u8a00\u901a\u5e38\u7528\u65bc\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u7576\u4f60\u9700\u8981\u5f9e\u63a5\u53e3\u4e2d\u63d0\u53d6\u5177\u9ad4\u985e\u578b\u7684\u503c\u6642\u3002<\/li>\n<li>\u7576\u4f60\u9700\u8981\u6aa2\u67e5\u4e00\u500b\u63a5\u53e3\u8b8a\u91cf\u662f\u5426\u5be6\u73fe\u4e86\u67d0\u500b\u5177\u9ad4\u985e\u578b\u3002<\/li>\n<li>\u5728\u591a\u614b\u6027\u4e2d\uff0c\u6839\u64da\u5177\u9ad4\u985e\u578b\u57f7\u884c\u4e0d\u540c\u7684\u908f\u8f2f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%a1%9e%e5%9e%8b%e6%96%b7%e8%a8%80%e7%9a%84%e7%a4%ba%e4%be%8b-rRgmMTALsS\">\u985e\u578b\u65b7\u8a00\u7684\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u985e\u578b\u65b7\u8a00\uff1a<\/p>\n<pre><code>package main\n\nimport (\n    \"fmt\"\n)\n\ntype Animal interface {\n    Speak() string\n}\n\ntype Dog struct{}\n\nfunc (d Dog) Speak() string {\n    return \"Woof!\"\n}\n\ntype Cat struct{}\n\nfunc (c Cat) Speak() string {\n    return \"Meow!\"\n}\n\nfunc makeSound(a Animal) {\n    switch v := a.(type) {\n    case Dog:\n        fmt.Println(\"Dog says:\", v.Speak())\n    case Cat:\n        fmt.Println(\"Cat says:\", v.Speak())\n    default:\n        fmt.Println(\"Unknown animal\")\n    }\n}\n\nfunc main() {\n    var a Animal\n    a = Dog{}\n    makeSound(a)\n\n    a = Cat{}\n    makeSound(a)\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b <code>Animal<\/code> \u63a5\u53e3\u548c\u5169\u500b\u5be6\u73fe\u8a72\u63a5\u53e3\u7684\u985e\u578b\uff1a<code>Dog<\/code> \u548c <code>Cat<\/code>\u3002\u5728 <code>makeSound<\/code> \u51fd\u6578\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u985e\u578b\u65b7\u8a00\u4f86\u6aa2\u67e5\u50b3\u5165\u7684\u63a5\u53e3\u985e\u578b\uff0c\u4e26\u6839\u64da\u5177\u9ad4\u985e\u578b\u57f7\u884c\u76f8\u61c9\u7684\u908f\u8f2f\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-rRgmMTALsS\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u985e\u578b\u65b7\u8a00\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u985e\u578b\u65b7\u8a00\u4e0d\u6703\u5f15\u767c\u904b\u884c\u6642\u932f\u8aa4\uff0c\u4f46\u5982\u679c\u65b7\u8a00\u5931\u6557\uff0c\u5247\u6703\u8fd4\u56de\u8a72\u985e\u578b\u7684\u96f6\u503c\u3002<\/li>\n<li>\u4f7f\u7528\u985e\u578b\u65b7\u8a00\u6642\uff0c\u61c9\u8a72\u8003\u616e\u5230\u53ef\u80fd\u7684\u985e\u578b\u4e0d\u5339\u914d\u60c5\u6cc1\uff0c\u4e26\u9032\u884c\u9069\u7576\u7684\u932f\u8aa4\u8655\u7406\u3002<\/li>\n<li>\u985e\u578b\u65b7\u8a00\u7684\u6027\u80fd\u958b\u92b7\u76f8\u5c0d\u8f03\u5c0f\uff0c\u4f46\u5728\u6027\u80fd\u654f\u611f\u7684\u4ee3\u78bc\u4e2d\uff0c\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-rRgmMTALsS\">\u7e3d\u7d50<\/h2>\n<p>\u985e\u578b\u65b7\u8a00\u662f Go \u8a9e\u8a00\u4e2d\u4e00\u500b\u5f37\u5927\u4e14\u9748\u6d3b\u7684\u7279\u6027\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u904b\u884c\u6642\u6aa2\u67e5\u548c\u8f49\u63db\u63a5\u53e3\u985e\u578b\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528\u985e\u578b\u65b7\u8a00\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u904b\u884c\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u60a8\u7684\u61c9\u7528\u5728\u7a69\u5b9a\u7684\u74b0\u5883\u4e2d\u904b\u884c\u3002\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Go\u8a9e\u8a00\u4e2d\u7684\u985e\u578b\u65b7\u8a00\uff0c\u638c\u63e1\u5982\u4f55\u5b89\u5168\u5730\u6aa2\u67e5\u548c\u8f49\u63db\u63a5\u53e3\u985e\u578b\uff0c\u63d0\u5347\u4f60\u7684\u7de8\u7a0b\u6280\u5de7\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-57880","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57880","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=57880"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57880\/revisions"}],"predecessor-version":[{"id":57881,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57880\/revisions\/57881"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=57880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=57880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=57880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}