{"id":5403,"date":"2021-12-16T22:48:00","date_gmt":"2021-12-16T14:48:00","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=5403"},"modified":"2021-12-30T10:51:53","modified_gmt":"2021-12-30T02:51:53","slug":"%e4%bb%98%e8%b4%b9%e6%95%b0%e6%8d%ae%e9%9b%86%e5%86%85%e5%ae%b9%e8%be%93%e5%87%ba-json-%e6%a0%bc%e5%bc%8f%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=5403","title":{"rendered":"[\u4ed8\u8d39]\u6570\u636e\u96c6\u5185\u5bb9\u8f93\u51fa JSON \u683c\u5f0f\u6570\u636e"},"content":{"rendered":"\n<p>\u55ef\uff0c\u8fd9\u662f\u4e00\u4e2a\u8bd5\u9a8c\u6027\u7684\u6536\u8d39\u4ea7\u54c1\uff0c\u5b83\u662f\u505a\u4e3a TQJsonOutputChannel  \u7684\u9644\u5c5e\u54c1\u5b58\u5728\u7684\uff0c\u4fe1\u8d56\u4e8e qjson_output_channel \u5355\u5143\uff0c\u63d0\u4f9b\u6570\u636e\u96c6\u8f6c\u6362\u4e3a JSON \u6570\u636e\u5185\u5bb9\u7684\u683c\u5f0f\u5316\u8f93\u51fa\u652f\u6301\u3002\u6536\u8d39\u6807\u51c6\u5b9a\u4e3a 200 \u5143\uff0c\u542b\u6e90\u7801\u3001\u793a\u4f8b\u548c\u7528\u6cd5\u4e00\u5bf9\u4e00\u6307\u5bfc\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3010\u4f7f\u7528\u65b9\u6cd5\u3011<\/h2>\n\n\n\n<p>\u4e00\u5982\u65e2\u5f80\u7684\u7b80\u5355\uff0c\u76f4\u63a5\u5f15\u7528 qjson_dataset \u5355\u5143\uff0c\u7136\u540e\u5c31\u53ef\u4ee5\u8c03\u7528 IQJsonEncoder \u7684 WriteElement\/WriteChild \u65b9\u6cd5\uff0c\u5199\u5165\u4e00\u4e2a\u6570\u636e\u96c6\u5bf9\u8c61\u7684\u5185\u5bb9\u4e86\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3010\u8f93\u51fa\u683c\u5f0f\u3011<\/h2>\n\n\n\n<p>\u8f93\u51fa\u7684 JSON \u6570\u636e\u652f\u6301\u4e24\u79cd\u683c\u5f0f\u548c\u989d\u5916\u4e24\u79cd\u63a7\u5236\u9009\u9879\uff1a<\/p>\n\n\n\n<p>\u683c\u5f0f1\uff1a\u5e38\u89c4\u683c\u5f0f\uff08DSF_STYLE_NORMAL)<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">[{\"user_name\":\"test\",\"age\":18,\"sex\":true },{\"user_name\":\"qdac\",\"age\":20, \"sex\":false}]<\/pre>\n\n\n\n<p>\u683c\u5f0f2\uff1a\u7cbe\u7b80\u683c\u5f0f(DSF_STYLE_PACKED\uff09<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">{\"names\":[\"user_name\",\"age\",\"sex\"],\"rows\":[[\"test\",18,true],[\"qdac\",20,false]]}<\/pre>\n\n\n\n<p id=\"block-19e9e291-98a9-4045-98f1-0b220920492d\">\u8981\u81ea\u5b9a\u4e49\u8f93\u51fa\u683c\u5f0f\u7684\u9009\u9879,\u53ef\u4ee5\u5728 WriteElement\/WriteChild \u7684\u9644\u52a0\u4ee5\u4e0b\u53c2\u6570:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>flags : \u8f93\u51fa\u683c\u5f0f\u6807\u5fd7,\u53ef\u4ee5\u662f DSF_STYLE_PACKED(\u4f7f\u7528\u7cbe\u7b80\u683c\u5f0f)\/DSF_CAMELIZED(\u4f7f\u7528\u9a7c\u5cf0\u683c\u5f0f\u8f6c\u6362\u6570\u636e\u96c6\u5b57\u6bb5\u540d)\/DSF_NULLABLE(\u7a7a\u503c\u662f\u5426\u8d4b\u503c\u4e3anull,\u4ec5\u5728\u5e38\u89c4\u6a21\u5f0f\u4e0b\u6709\u610f\u4e49,\u7cbe\u7b80\u6a21\u5f0f\u4e0b\u56e0\u4e3a\u5b57\u6bb5\u987a\u5e8f\u5339\u914d\u8981\u6c42,\u5fc5\u9700\u4fdd\u7559\u5bf9\u5e94\u503c) <\/li><li>rowsKey : \u5bf9\u5e94\u4e8e\u7cbe\u7b80\u683c\u5f0f\u4e0b,\u8bb0\u5f55\u5217\u8868\u7ed3\u70b9\u7684\u540d\u79f0<\/li><li>fieldsKey : \u5bf9\u5e94\u4e8e\u7cbe\u7b80\u683c\u5f0f\u4e0b,\u5b57\u6bb5\u5217\u8868\u7ed3\u70b9\u7684\u540d\u79f0<\/li><\/ul>\n\n\n\n<p>\u3010\u793a\u4f8b\u4ee3\u7801\u3011<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">procedure TForm2.SpeedButton6Click(Sender: TObject);\nvar\n  AWriter: IQJsonStreamEncoder;\n  AStream: TStream;\n  ADataSet: TADODataSet;\n  AJson: TQJson;\n  AOptions: Integer;\nbegin\n  ADataSet := TADODataSet.Create(nil);\n  ADataSet.FieldDefs.Add('user_name', ftString, 20);\n  ADataSet.FieldDefs.Add('age', ftInteger);\n  ADataSet.FieldDefs.Add('sex', ftBoolean);\n  ADataSet.CreateDataSet;\n  ADataSet.Append;\n  ADataSet.Fields[0].AsString := 'test';\n  ADataSet.Fields[1].AsInteger := 18;\n  ADataSet.Fields[2].AsBoolean := true;\n  ADataSet.Post;\n  ADataSet.Append;\n  ADataSet.Fields[0].AsString := 'qdac';\n  ADataSet.Fields[1].AsInteger := 20;\n  ADataSet.Fields[2].AsBoolean := false;\n  ADataSet.Post;\n  AJson := TQJson.Create;\n  AStream := TMemoryStream.Create;\n  if chkLazyWrite.Checked then\n    AWriter := TQJsonOutputChannel.CreateEncoder(teUtf8, AStream,\n      true, 32, 8192)\n  else\n    AWriter := TQJsonOutputChannel.CreateEncoder(teUtf8, AStream, true);\n  try\n    if CheckBox1.Checked then\n      AOptions := DSF_STYLE_PACKED\n    else\n      AOptions := 0;\n    if chkCamelize.Checked then\n      AOptions := AOptions + DSF_CAMELIZED;\n    if chkCustomKey.Checked then\n      AWriter.WriteElement(ADataSet, [AWriter.NewParam('flags', AOptions),\n        AWriter.NewParam('rowsKey', 'records'), AWriter.NewParam('fieldsKey',\n        'fields')])\n    else\n      AWriter.WriteElement(ADataSet, [AWriter.NewParam('flags', AOptions)]);\n    AWriter.Flush;\n    AStream.Position := 0;\n    AJson.LoadFromStream(AStream);\n    ShowMessage(AJson.AsJson);\n  finally\n    FreeAndNil(AStream);\n    FreeAndNil(AJson);\n    FreeAndNil(ADataSet);\n  end;\nend;<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u55ef\uff0c\u8fd9\u662f\u4e00\u4e2a\u8bd5\u9a8c\u6027\u7684\u6536\u8d39\u4ea7\u54c1\uff0c\u5b83\u662f\u505a\u4e3a  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[8,9,7,603],"tags":[],"class_list":["post-5403","post","type-post","status-publish","format-standard","hentry","category-delphi","category-qdac","category-qjson","category-603"],"views":2459,"_links":{"self":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/5403","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5403"}],"version-history":[{"count":7,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/5403\/revisions"}],"predecessor-version":[{"id":5415,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/5403\/revisions\/5415"}],"wp:attachment":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}