{"id":207753,"date":"2025-07-08T09:16:31","date_gmt":"2025-07-08T01:16:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207753\/"},"modified":"2025-07-08T09:16:31","modified_gmt":"2025-07-08T01:16:31","slug":"%e4%bd%bf%e7%94%a8%e7%bc%93%e5%86%b2%e5%8c%ba%e7%9a%84-csv-%e7%bc%96%e5%86%99%e5%99%a8%e4%bc%9a%e5%af%bc%e8%87%b4%e7%a9%ba%e8%be%93%e5%87%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207753\/","title":{"rendered":"\u4f7f\u7528\u7f13\u51b2\u533a\u7684 csv \u7f16\u5199\u5668\u4f1a\u5bfc\u81f4\u7a7a\u8f93\u51fa"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u4f7f\u7528\u7f13\u51b2\u533a\u7684 csv \u7f16\u5199\u5668\u4f1a\u5bfc\u81f4\u7a7a\u8f93\u51fa<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-25 12:36:35<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u4f7f\u7528\u7f13\u51b2\u533a\u7684 csv \u7f16\u5199\u5668\u4f1a\u5bfc\u81f4\u7a7a\u8f93\u51fa\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u51fd\u6570\u6765\u83b7\u53d6\u4e00\u4e9b\u6570\u636e\u5e76\u5c06\u5176\u5199\u5165 csv\uff0c\u5e76\u5c06\u8f93\u51fa\u5b58\u50a8\u5728\u7f13\u51b2\u533a\u4e2d\u3002 <\/p>\n<pre>type OptIn struct {\n    Email      string `json:\"email\"`\n    LastUpdate string `json:\"opt_in_last_update\"`\n}\n\nfunc writeCSV(data []OptIn) ([]byte, error) {\n    var buf bytes.Buffer\n    writer := csv.NewWriter(&amp;buf)\n\n    defer writer.Flush()\n\n    for _, obj := range data {\n        var record []string\n        record = append(record, obj.Email)\n        record = append(record, obj.LastUpdate)\n        err := writer.Write(record)\n        if err != nil {\n            panic(err.Error())\n        }\n    }\n\n    return buf.Bytes(), nil\n}<\/pre>\n<p>\u95ee\u9898\u662f <code>buf.bytes()<\/code> \u59cb\u7ec8\u4e3a\u7a7a\uff0c\u5373\u4f7f\u8f93\u5165\u4e0d\u4e3a\u7a7a\u5e76\u4e14\u6ca1\u6709\u629b\u51fa\u9519\u8bef\u3002<\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u5728\u8c03\u7528<code>.bytes()<\/code>\u4e4b\u524d\u9700\u8981\u5148\u8c03\u7528<code>writer.flush()<\/code>\uff0c\u5e76\u5728\u8fd4\u56de\u4e4b\u524d\u68c0\u67e5\uff1a<\/p>\n<pre>\/\/ TODO: remove `defer writer.Flush()`\n  \/\/ ...\n\n  writer.Flush()\n\n  if err := writer.Error(); err != nil {\n    return nil, err\n  }\n\n  return buf.Bytes(), nil\n}<\/pre>\n<p>\u60a8\u7684\u793a\u4f8b\u4ee3\u7801\u6309\u4ee5\u4e0b\u987a\u5e8f\u6267\u884c\u64cd\u4f5c\uff1a<\/p>\n<ol>\n<li>\u8c03\u7528 <code>buf.bytes()<\/code><\/li>\n<li>\u8fd4\u56de\u751f\u6210\u7684\u5b57\u8282\u7247\u548cnil<\/li>\n<li>\u8c03\u7528 <code>writer.flush()<\/code><\/li>\n<\/ol>\n<p>\u663e\u7136\u8fd9\u4e0d\u662f\u9884\u671f\u7684\u987a\u5e8f\uff0c\u56e0\u4e3a\u6211\u4eec\u9700\u8981\u5728\u8bbf\u95ee\u751f\u6210\u7684\u5b57\u8282\u5207\u7247\u4e4b\u524d\u5237\u65b0\uff08\u5e76\u68c0\u67e5\u4efb\u4f55\u7f16\u5199\u5668\u9519\u8bef\uff01\uff09\u3002<\/p>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u4f7f\u7528\u7f13\u51b2\u533a\u7684 csv \u7f16\u5199\u5668\u4f1a\u5bfc\u81f4\u7a7a\u8f93\u51fa\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#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-207753","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207753","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=207753"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207753\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}