德尔福XE4解析JSON

Question

我似乎有点解决JSON，但不是所有的JSON有问题。我从Shopify提取数据，当我获取products.json时，它解析正确。当我得到一个特定的产品时，我得到一个'Invalid Class Typecast'错误。

在Delphi XE4中使用dbxjson.pas，我只是在学习如何使用它。以下代码中的一部分来自对前面关于一般使用JSON解析器的问题的回答。

我只是将JSON放入备注字段，然后调用parsejson2（memo1.text），并将结果放入备忘录2中。

我正确地获取JSON，并通过json.parser.online.fr验证了它是正确的。

这里是JSON输出与代码的工作，我有：

{"products":[{"id":11332270357,"title":"Burton Custom Freestyle 151","body_html":"\u003cstrong\u003eGood snowboard!\u003c\/strong\u003e","vendor":"Burton","product_type":"Snowboard","created_at":"2017-07-26T12:55:21-04:00","handle":"burton-custom-freestyle-151","updated_at":"2017-07-26T12:55:21-04:00","published_at":"2017-07-26T12:55:21-04:00","template_suffix":null,"published_scope":"global","tags":"\"Big Air\", Barnes \u0026 Noble, John's Fav","variants":[{"id":48188219989,"product_id":11332270357,"title":"Default Title","price":"0.00","sku":"","position":1,"grams":0,"inventory_policy":"deny","compare_at_price":null,"fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2017-07-26T12:55:21-04:00","updated_at":"2017-07-26T12:55:21-04:00","taxable":true,"barcode":null,"image_id":null,"inventory_quantity":1,"weight":0.0,"weight_unit":"lb","old_inventory_quantity":1,"requires_shipping":true}],"options":[{"id":13730250389,"product_id":11332270357,"name":"Title","position":1,"values":["Default Title"]}],"images":[],"image":null},{"id":11400089237,"title":"Pile of Rocks","body_html":"Wicked cool pile of rocks from Hawaii!","vendor":"test_titan","product_type":"","created_at":"2017-08-01T09:44:11-04:00","handle":"pile-of-rocks","updated_at":"2017-08-01T09:44:54-04:00","published_at":"2017-08-01T09:40:55-04:00","template_suffix":null,"published_scope":"global","tags":"","variants":[{"id":48653472149,"product_id":11400089237,"title":"pile \/ various","price":"1000.00","sku":"12345678974346547000","position":1,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"various","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472213,"product_id":11400089237,"title":"pile \/ green","price":"1000.00","sku":"12345678974346547000","position":2,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"green","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472277,"product_id":11400089237,"title":"pile \/ blue","price":"1000.00","sku":"12345678974346547000","position":3,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"blue","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472341,"product_id":11400089237,"title":"pile \/ purple","price":"1000.00","sku":"12345678974346547000","position":4,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"purple","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472405,"product_id":11400089237,"title":"pile \/ red","price":"1000.00","sku":"12345678974346547000","position":5,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"red","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472469,"product_id":11400089237,"title":"hill \/ various","price":"1000.00","sku":"12345678974346547000","position":6,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"various","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472533,"product_id":11400089237,"title":"hill \/ green","price":"1000.00","sku":"12345678974346547000","position":7,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"green","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472597,"product_id":11400089237,"title":"hill \/ blue","price":"1000.00","sku":"12345678974346547000","position":8,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"blue","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472661,"product_id":11400089237,"title":"hill \/ purple","price":"1000.00","sku":"12345678974346547000","position":9,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"purple","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472725,"product_id":11400089237,"title":"hill \/ red","price":"1000.00","sku":"12345678974346547000","position":10,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"red","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472789,"product_id":11400089237,"title":"mountain \/ various","price":"1000.00","sku":"12345678974346547000","position":11,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"various","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472853,"product_id":11400089237,"title":"mountain \/ green","price":"1000.00","sku":"12345678974346547000","position":12,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"green","option3":null,"created_at":"2017-08-01T09:44:12-04:00","updated_at":"2017-08-01T09:44:12-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472917,"product_id":11400089237,"title":"mountain \/ blue","price":"1000.00","sku":"12345678974346547000","position":13,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"blue","option3":null,"created_at":"2017-08-01T09:44:12-04:00","updated_at":"2017-08-01T09:44:12-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472981,"product_id":11400089237,"title":"mountain \/ purple","price":"1000.00","sku":"12345678974346547000","position":14,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"purple","option3":null,"created_at":"2017-08-01T09:44:12-04:00","updated_at":"2017-08-01T09:44:12-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653473045,"product_id":11400089237,"title":"mountain \/ red","price":"1000.00","sku":"12345678974346547000","position":15,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"red","option3":null,"created_at":"2017-08-01T09:44:12-04:00","updated_at":"2017-08-01T09:44:12-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true}],"options":[{"id":13812358421,"product_id":11400089237,"name":"Size","position":1,"values":["pile","hill","mountain"]},{"id":13812358485,"product_id":11400089237,"name":"Color","position":2,"values":["various","green","blue","purple","red"]}],"images":[{"id":28069860373,"product_id":11400089237,"position":1,"created_at":"2017-08-01T09:44:54-04:00","updated_at":"2017-08-01T09:44:54-04:00","width":4096,"height":2304,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/2130\/9415\/products\/20161010_173112.jpg?v=1501595094","variant_ids":[]}],"image":{"id":28069860373,"product_id":11400089237,"position":1,"created_at":"2017-08-01T09:44:54-04:00","updated_at":"2017-08-01T09:44:54-04:00","width":4096,"height":2304,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/2130\/9415\/products\/20161010_173112.jpg?v=1501595094","variant_ids":[]}},{"id":11319164053,"title":"Test Product","body_html":"This is a test product only for testing API.","vendor":"test_titan","product_type":"","created_at":"2017-07-24T16:05:00-04:00","handle":"test-product","updated_at":"2017-07-25T14:20:01-04:00","published_at":"2017-07-24T16:04:07-04:00","template_suffix":null,"published_scope":"global","tags":"","variants":[{"id":48023373269,"product_id":11319164053,"title":"Default Title","price":"10000.00","sku":"11226644","position":1,"grams":0,"inventory_policy":"deny","compare_at_price":"50.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"Default Title","option2":null,"option3":null,"created_at":"2017-07-24T16:05:00-04:00","updated_at":"2017-07-24T16:05:00-04:00","taxable":true,"barcode":"123456789","image_id":null,"inventory_quantity":20,"weight":0.0,"weight_unit":"lb","old_inventory_quantity":20,"requires_shipping":true}],"options":[{"id":13711000789,"product_id":11319164053,"name":"Title","position":1,"values":["Default Title"]}],"images":[],"image":null}]} 

这里是JSON输出不工作：

{"product":{"id":11400089237,"title":"Pile of Rocks","body_html":"Wicked cool pile of rocks from Hawaii!","vendor":"test_titan","product_type":"","created_at":"2017-08-01T09:44:11-04:00","handle":"pile-of-rocks","updated_at":"2017-08-01T09:44:54-04:00","published_at":"2017-08-01T09:40:55-04:00","template_suffix":null,"published_scope":"global","tags":"","variants":[{"id":48653472149,"product_id":11400089237,"title":"pile \/ various","price":"1000.00","sku":"12345678974346547000","position":1,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"various","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472213,"product_id":11400089237,"title":"pile \/ green","price":"1000.00","sku":"12345678974346547000","position":2,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"green","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472277,"product_id":11400089237,"title":"pile \/ blue","price":"1000.00","sku":"12345678974346547000","position":3,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"blue","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472341,"product_id":11400089237,"title":"pile \/ purple","price":"1000.00","sku":"12345678974346547000","position":4,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"purple","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472405,"product_id":11400089237,"title":"pile \/ red","price":"1000.00","sku":"12345678974346547000","position":5,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"pile","option2":"red","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472469,"product_id":11400089237,"title":"hill \/ various","price":"1000.00","sku":"12345678974346547000","position":6,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"various","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472533,"product_id":11400089237,"title":"hill \/ green","price":"1000.00","sku":"12345678974346547000","position":7,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"green","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472597,"product_id":11400089237,"title":"hill \/ blue","price":"1000.00","sku":"12345678974346547000","position":8,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"blue","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472661,"product_id":11400089237,"title":"hill \/ purple","price":"1000.00","sku":"12345678974346547000","position":9,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"purple","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472725,"product_id":11400089237,"title":"hill \/ red","price":"1000.00","sku":"12345678974346547000","position":10,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"hill","option2":"red","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472789,"product_id":11400089237,"title":"mountain \/ various","price":"1000.00","sku":"12345678974346547000","position":11,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"various","option3":null,"created_at":"2017-08-01T09:44:11-04:00","updated_at":"2017-08-01T09:44:11-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472853,"product_id":11400089237,"title":"mountain \/ green","price":"1000.00","sku":"12345678974346547000","position":12,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"green","option3":null,"created_at":"2017-08-01T09:44:12-04:00","updated_at":"2017-08-01T09:44:12-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472917,"product_id":11400089237,"title":"mountain \/ blue","price":"1000.00","sku":"12345678974346547000","position":13,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"blue","option3":null,"created_at":"2017-08-01T09:44:12-04:00","updated_at":"2017-08-01T09:44:12-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653472981,"product_id":11400089237,"title":"mountain \/ purple","price":"1000.00","sku":"12345678974346547000","position":14,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"purple","option3":null,"created_at":"2017-08-01T09:44:12-04:00","updated_at":"2017-08-01T09:44:12-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true},{"id":48653473045,"product_id":11400089237,"title":"mountain \/ red","price":"1000.00","sku":"12345678974346547000","position":15,"grams":14,"inventory_policy":"deny","compare_at_price":"9999.00","fulfillment_service":"manual","inventory_management":"shopify","option1":"mountain","option2":"red","option3":null,"created_at":"2017-08-01T09:44:12-04:00","updated_at":"2017-08-01T09:44:12-04:00","taxable":true,"barcode":"44569874345654","image_id":null,"inventory_quantity":1,"weight":0.5,"weight_unit":"oz","old_inventory_quantity":1,"requires_shipping":true}],"options":[{"id":13812358421,"product_id":11400089237,"name":"Size","position":1,"values":["pile","hill","mountain"]},{"id":13812358485,"product_id":11400089237,"name":"Color","position":2,"values":["various","green","blue","purple","red"]}],"images":[{"id":28069860373,"product_id":11400089237,"position":1,"created_at":"2017-08-01T09:44:54-04:00","updated_at":"2017-08-01T09:44:54-04:00","width":4096,"height":2304,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/2130\/9415\/products\/20161010_173112.jpg?v=1501595094","variant_ids":[]}],"image":{"id":28069860373,"product_id":11400089237,"position":1,"created_at":"2017-08-01T09:44:54-04:00","updated_at":"2017-08-01T09:44:54-04:00","width":4096,"height":2304,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/2130\/9415\/products\/20161010_173112.jpg?v=1501595094","variant_ids":[]}}} 

我可以看到两者之间的主要区别是方括号[]，但我仍然不知道为什么它不解析第二个。任何帮助是极大的赞赏。

procedure TForm1.parsejson2(s, sKey: string); 
var 
    jsv : TJsonValue; 
    originalObject : TJsonObject; 
    jsPair : TJsonPair; 
    jsArr : TJsonArray; 
    jso : TJsonObject; 
    i,j : integer; 
    aos : Tarray<string>; 
    sValue : String; 
begin 
    try 
    //parse json string 
    jsv := TJSONObject.ParseJSONValue(s); 
    try 
     //value as object 
     originalObject := jsv as TJsonObject; 
     //get pair, wich contains Array of objects 
     jspair := originalObject.Get(sKey); 
     //pair value as array 
     jsArr := jsPair.jsonValue as TJsonArray; 
     //enumerate objects in array 
     for i := 0 to jsArr.Size - 1 do 
     begin // i-th object 
     try 
      jso := jsArr.Get(i) as TJsonObject; 
     except 
     end; 
     //enumerate object fields 
     for jsPair in jso do 
     begin 
      Memo2.Lines.Add(spaces + ' '+ jsPair.JsonString.Value+ ': '+ jsPair.JsonValue.Value); 
      if (jsPair.JsonValue is TJsonArray) then 
      begin 
      spaces := spaces + ' '; 
      if (jsPair.JsonValue.ToString).Contains(':') then 
      begin 
       ParseJson2('{"'+jsPair.JsonString.Value+'":'+jsPair.JsonValue.ToString+'}', jsPair.JsonString.Value); 
      end else begin 
       aos := (jsPair.JsonValue.ToString).Split([','], 99); 
       for j := low(aos) to High(aos) do 
       begin 
       sValue := StringReplace(aos[j], '[', '', [rfReplaceAll]); 
       sValue := StringReplace(sValue, ']', '', [rfReplaceAll]); 
       sValue := StringReplace(sValue, '"', '', [rfReplaceAll]); 
       if trim(sValue) <> '' then Memo2.Lines.Add(spaces+spaces+sValue); 
       end; 
      end; 
      spaces := copy(spaces,1,length(spaces)-3); 
      end; 
     end; 
     end; 
    finally 
     jsv.Free(); 
    end; 
    except 
    on E: Exception do 
     Memo2.Lines.Add(E.ClassName+ ': '+ E.Message); 
    end; 
end; 

Answer 1

它看起来像Delphi代码解析一切都很好。问题来自您的代码。 JSON中的括号不仅仅用于显示。你得到的第一个结果是有效的，它的products值是对象的数组。因此，这条线的工作原理：

jsArr := jsPair.jsonValue as TJsonArray; 

第二个结果，你得到的，这是不行的，有一个product值（不products）是不一个数组，它是一个单一的对象，所以，当你运行这段代码，你确实执行了一个无效的类类型转换。您需要改用jsPair.jsonValue as TJsonObject。

如果我是你，我不会尝试用相同的代码处理这两种结果。我会列出处理单个产品的代码并将其放入其自己的函数中。然后我会写两个JSON处理功能：

• 一个会读第一类JSON的结果，您则显示，并调用产品处理功能为products阵列中的每个对象的循环。

• 另一个会读取您显示的第二种JSON结果，并调用单个product对象的产品处理函数。