{"id":206609,"date":"2025-06-12T11:40:32","date_gmt":"2025-06-12T03:40:32","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206609\/"},"modified":"2025-06-12T11:40:32","modified_gmt":"2025-06-12T03:40:32","slug":"go-%e8%af%ad%e8%a8%80%e4%b8%ad-channel-%e6%90%ad%e9%85%8d-select-%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e9%ab%98%e6%95%88%e7%9a%84%e5%b9%b6%e5%8f%91%e6%95%b0%e6%8d%ae%e8%af%bb%e5%8f%96%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206609\/","title":{"rendered":"Go \u8bed\u8a00\u4e2d channel \u642d\u914d select \u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5e76\u53d1\u6570\u636e\u8bfb\u53d6\uff1f"},"content":{"rendered":"<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aGo \u8bed\u8a00\u4e2d channel \u642d\u914d select \u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5e76\u53d1\u6570\u636e\u8bfb\u53d6\uff1f\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~,<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241117\/1731809747673951d3ced7e.jpg\" class=\"aligncenter\">,<br \/>\n<strong>go \u8bed\u8a00\u4e2d channel \u642d\u914d select \u7684\u5999\u7528<\/strong>,\u5728 go \u8bed\u8a00\u4e2d\uff0cchannel \u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5e76\u53d1\u901a\u4fe1\u673a\u5236\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u534f\u8c03 goroutine \u4e4b\u95f4\u7684\u901a\u4fe1\u548c\u6570\u636e\u5171\u4eab\u3002\u800c select \u8bed\u53e5\u5219\u662f\u7528\u6765\u4ece\u591a\u4e2a channel \u4e2d\u9009\u62e9\u4e00\u4e2a\u53ef\u7528\u7684 channel \u8fdb\u884c\u64cd\u4f5c\u3002,\u60a8\u63d0\u5230\u7684\u4e24\u4e2a\u793a\u4f8b\u6f14\u793a\u4e86 channel \u4e0e select \u642d\u914d\u4f7f\u7528\u7684\u4e24\u79cd\u4e0d\u540c\u5199\u6cd5\uff1a,\u5c31\u8fd9\u4e24\u4e2a\u793a\u4f8b\u800c\u8a00\uff0c\u5b83\u4eec\u5728\u8fd0\u884c\u65f6\u5e76\u6ca1\u6709\u660e\u663e\u533a\u522b\u3002\u4f46\u662f\uff0c\u5f53\u8003\u8651\u66f4\u590d\u6742\u7684\u5e76\u53d1\u573a\u666f\u65f6\uff0cselect \u8bed\u53e5\u7684\u4f18\u52bf\u4fbf\u663e\u73b0\u51fa\u6765\u4e86\u3002,\u8bbe\u60f3\u4e00\u79cd\u60c5\u51b5\uff0cchannel ch \u4e0d\u65ad\u6709\u6570\u636e\u5199\u5165\u3002\u8981\u6301\u7eed\u8bfb\u53d6\u8fd9\u4e9b\u6570\u636e\uff0c\u60a8\u9700\u8981\u4f7f\u7528\u4e00\u4e2a for \u5faa\u73af\uff1a,\u5982\u679c myselect() \u51fd\u6570\u9700\u8981\u540c\u65f6\u8bfb\u53d6\u5e76\u5904\u7406\u53e6\u4e00\u4e2a\u6301\u7eed\u5199\u5165\u6570\u636e\u7684 channel ch2\uff0c\u4e0a\u8ff0\u4ee3\u7801\u5c06\u65e0\u6cd5\u5b9e\u73b0\uff0c\u56e0\u4e3a &lt;-ch \u53ef\u80fd\u5bfc\u81f4\u7a0b\u5e8f\u963b\u585e\u3002,\u6b64\u65f6\uff0cselect \u8bed\u53e5\u5c31\u53ef\u4ee5\u53d1\u6325\u4f5c\u7528\u4e86\u3002\u5b83\u5141\u8bb8\u60a8\u76d1\u542c\u591a\u4e2a channel\uff0c\u4e00\u65e6\u6709\u6570\u636e\u53ef\u8bfb\uff0c\u5c31\u9009\u62e9\u4e00\u4e2a\u8fdb\u884c\u64cd\u4f5c\uff0c\u4ece\u800c\u907f\u514d\u963b\u585e\uff1a,\u65e0\u8bba ch \u6216 ch2 \u4e2d\u54ea\u4e2a\u5148\u6709\u6570\u636e\u51c6\u5907\u597d\u88ab\u8bfb\u53d6\uff0c\u90fd\u4e0d\u4f1a\u5f15\u8d77\u7a0b\u5e8f\u963b\u585e\u3002\u56e0\u6b64\uff0cselect \u8bed\u53e5\u5bf9\u4e8e\u5904\u7406\u591a\u4e2a\u5e76\u53d1\u6570\u636e\u6e90\u81f3\u5173\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u63d0\u4f9b\u4e86\u975e\u963b\u585e\u3001\u9ad8\u6548\u7684\u673a\u5236\u6765\u4ece\u8fd9\u4e9b\u6e90\u8bfb\u53d6\u6570\u636e\u3002,\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aGo \u8bed\u8a00\u4e2d channel \u642d\u914d select \u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5e76\u53d1\u6570\u636e\u8bfb\u53d6\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\u5427\uff01,go \u8bed\u8a00\u4e2d channel \u642d\u914d select \u7684\u5999\u7528,\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aGo \u8bed\u8a00\u4e2d channel \u642d\u914d select \u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5e76\u53d1\u6570\u636e\u8bfb\u53d6\uff1f\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~,<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 \u8bed\u8a00\u4e2d channel \u642d\u914d select \u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5e76\u53d1\u6570\u636e\u8bfb\u53d6\uff1f<\/span><\/p>\n<h1>Go \u8bed\u8a00\u4e2d channel \u642d\u914d select \u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5e76\u53d1\u6570\u636e\u8bfb\u53d6\uff1f<\/h1>\n<p><span>2024-11-17 10:16:03<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aGo \u8bed\u8a00\u4e2d channel \u642d\u914d select \u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5e76\u53d1\u6570\u636e\u8bfb\u53d6\uff1f\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241117\/1731809747673951d3ced7e.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>go \u8bed\u8a00\u4e2d channel \u642d\u914d select \u7684\u5999\u7528<\/strong><\/p>\n<p>\u5728 go \u8bed\u8a00\u4e2d\uff0cchannel \u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5e76\u53d1\u901a\u4fe1\u673a\u5236\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u534f\u8c03 goroutine \u4e4b\u95f4\u7684\u901a\u4fe1\u548c\u6570\u636e\u5171\u4eab\u3002\u800c select \u8bed\u53e5\u5219\u662f\u7528\u6765\u4ece\u591a\u4e2a channel \u4e2d\u9009\u62e9\u4e00\u4e2a\u53ef\u7528\u7684 channel \u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<p>\u60a8\u63d0\u5230\u7684\u4e24\u4e2a\u793a\u4f8b\u6f14\u793a\u4e86 channel \u4e0e select \u642d\u914d\u4f7f\u7528\u7684\u4e24\u79cd\u4e0d\u540c\u5199\u6cd5\uff1a<\/p>\n<pre>func myselect() {\n    ch := make(chan int, 10)\n\n    a := &lt;-ch\n    fmt.println(a)\n}<\/pre>\n<pre>func myselect() {\n    ch := make(chan int, 10)\n\n    select {\n    case a := &lt;-ch:\n        fmt.println(a)\n    }\n}<\/pre>\n<p>\u5c31\u8fd9\u4e24\u4e2a\u793a\u4f8b\u800c\u8a00\uff0c\u5b83\u4eec\u5728\u8fd0\u884c\u65f6\u5e76\u6ca1\u6709\u660e\u663e\u533a\u522b\u3002\u4f46\u662f\uff0c\u5f53\u8003\u8651\u66f4\u590d\u6742\u7684\u5e76\u53d1\u573a\u666f\u65f6\uff0cselect \u8bed\u53e5\u7684\u4f18\u52bf\u4fbf\u663e\u73b0\u51fa\u6765\u4e86\u3002<\/p>\n<p>\u8bbe\u60f3\u4e00\u79cd\u60c5\u51b5\uff0cchannel ch \u4e0d\u65ad\u6709\u6570\u636e\u5199\u5165\u3002\u8981\u6301\u7eed\u8bfb\u53d6\u8fd9\u4e9b\u6570\u636e\uff0c\u60a8\u9700\u8981\u4f7f\u7528\u4e00\u4e2a for \u5faa\u73af\uff1a<\/p>\n<pre>func myselect(ch chan int) {\n    for {\n        a := &lt;-ch\n        fmt.println(a)\n    }\n}<\/pre>\n<p>\u5982\u679c myselect() \u51fd\u6570\u9700\u8981\u540c\u65f6\u8bfb\u53d6\u5e76\u5904\u7406\u53e6\u4e00\u4e2a\u6301\u7eed\u5199\u5165\u6570\u636e\u7684 channel ch2\uff0c\u4e0a\u8ff0\u4ee3\u7801\u5c06\u65e0\u6cd5\u5b9e\u73b0\uff0c\u56e0\u4e3a &lt;-ch \u53ef\u80fd\u5bfc\u81f4\u7a0b\u5e8f\u963b\u585e\u3002<\/p>\n<p>\u6b64\u65f6\uff0cselect \u8bed\u53e5\u5c31\u53ef\u4ee5\u53d1\u6325\u4f5c\u7528\u4e86\u3002\u5b83\u5141\u8bb8\u60a8\u76d1\u542c\u591a\u4e2a channel\uff0c\u4e00\u65e6\u6709\u6570\u636e\u53ef\u8bfb\uff0c\u5c31\u9009\u62e9\u4e00\u4e2a\u8fdb\u884c\u64cd\u4f5c\uff0c\u4ece\u800c\u907f\u514d\u963b\u585e\uff1a<\/p>\n<pre>func MySelect(ch chan int, ch2 chan int) {\n    for {\n        select {\n        case a := &lt;-ch:\n            fmt.Println(a)\n        case b := &lt;-ch2:\n            fmt.Println(b)\n        }\n    }\n}<\/pre>\n<p>\u65e0\u8bba ch \u6216 ch2 \u4e2d\u54ea\u4e2a\u5148\u6709\u6570\u636e\u51c6\u5907\u597d\u88ab\u8bfb\u53d6\uff0c\u90fd\u4e0d\u4f1a\u5f15\u8d77\u7a0b\u5e8f\u963b\u585e\u3002\u56e0\u6b64\uff0cselect \u8bed\u53e5\u5bf9\u4e8e\u5904\u7406\u591a\u4e2a\u5e76\u53d1\u6570\u636e\u6e90\u81f3\u5173\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u63d0\u4f9b\u4e86\u975e\u963b\u585e\u3001\u9ad8\u6548\u7684\u673a\u5236\u6765\u4ece\u8fd9\u4e9b\u6e90\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aGo \u8bed\u8a00\u4e2d channel \u642d\u914d select \u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5e76\u53d1\u6570\u636e\u8bfb\u53d6\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\u5427\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   Win10\u7cfb\u7edf\u670d\u52a1\u7ba1\u7406\u5668\u600e\u4e48\u6253\u5f00\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u6ca1\u6709\u6307\u5b9a\u5c3a\u5bf8\u7684 SVG \u5143\u7d20\u5728\u6d4f\u89c8\u5668\u4e2d\u5982\u4f55\u663e\u793a\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404&#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-206609","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206609","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=206609"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206609\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206609"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206609"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206609"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}