如何解析具有多个值的json数据？

Posted 2023-05-09

【中文标题】如何解析具有多个值的json数据？

【英文标题】：how to parse a json data with multiple values?

【发布时间】：2018-12-06 00:23:01

【问题描述】：

我有一个多维 json 。我想解析它以获取值。

var json='"Links":[],"RequestedObject":"FieldContents":"21514":"Type":1,"IsError":false,"Value":"Saneen","FieldId":21514,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21516":"Type":1,"IsError":false,"Value":"English","FieldId":21516,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21517":"Type":1,"IsError":false,"Value":"Malayalam","FieldId":21517,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21515":"Type":2,"IsError":false,"Value":26.0,"FieldId":21515,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21518":"Type":2,"IsError":false,"Value":80.0,"FieldId":21518,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21519":"Type":2,"IsError":false,"Value":40.0,"FieldId":21519,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21520":"Type":4,"IsError":false,"Value":"ValuesListIds":[72639],"OtherText":null,"FieldId":21520,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21523":"Type":3,"IsError":false,"Value":"2017-03-29T00:00:00","FieldId":21523,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21510":"Type":6,"FieldId":21510,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21511":"Type":21,"FieldId":21511,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21512":"Type":22,"FieldId":21512,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21521":"Type":11,"Value":null,"FieldId":21521,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"IsSuccessful":true,"ValidationMessages":[]';

我尝试过 JSON.parse ，但没​​有运气。

【问题讨论】：

JSON.parse(json)

JSON.parse 在这里工作得很好。

JSON.parse 应该能够做到这一点。你用的是什么浏览器？

Safely turning a JSON string into an object的可能重复

【参考方案1】：

这是JSON.parse()和here is document for that的简单示例：

var json='"Links":[],"RequestedObject":"FieldContents":"21514":"Type":1,"IsError":false,"Value":"Saneen","FieldId":21514,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21516":"Type":1,"IsError":false,"Value":"English","FieldId":21516,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21517":"Type":1,"IsError":false,"Value":"Malayalam","FieldId":21517,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21515":"Type":2,"IsError":false,"Value":26.0,"FieldId":21515,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21518":"Type":2,"IsError":false,"Value":80.0,"FieldId":21518,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21519":"Type":2,"IsError":false,"Value":40.0,"FieldId":21519,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21520":"Type":4,"IsError":false,"Value":"ValuesListIds":[72639],"OtherText":null,"FieldId":21520,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21523":"Type":3,"IsError":false,"Value":"2017-03-29T00:00:00","FieldId":21523,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21510":"Type":6,"FieldId":21510,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21511":"Type":21,"FieldId":21511,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21512":"Type":22,"FieldId":21512,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"21521":"Type":11,"Value":null,"FieldId":21521,"UpdateInformation":"CreateDate":null,"UpdateDate":null,"CreateLogin":null,"UpdateLogin":null,"IsSuccessful":true,"ValidationMessages":[]';

var obj = JSON.parse(json);
console.log(obj);

// retrieve particular fields

var newFieldContents = ;

for(var key in obj['RequestedObject']['FieldContents'])
  var o = obj['RequestedObject']['FieldContents'][key];
  newFieldContents[key] = 
    Value: o['Value'],
    FieldId: o['FieldId']
  


console.log(newFieldContents);

更新

添加如何检索特定字段。

【讨论】：

我只需要一些特定的字段，例如 value 和 FieldId

我已更新，但并非所有对象都包含值。