Java String string is converted into json array and traversed

If you need to convert the String string into a json array, and as long as the value of a field in the string, the field is a string of the json array, such as the following json form

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1. {  
2. returnCode: "return code" ,  
3. returnMessage: "Returned error message" ,  
4. rowCount: "Number of rows returned" ,  
5. colCount: "Return the number of data columns" ,  
6. requestParams: "call parameters" ,  
7. requestTime: "receive request time" ,  
8. responseTime: "Return request result time" ,  
9. takeTime: "Time (in seconds)" ,  
10.   DS:[   
11.         {field name 1: "field value 1", field name 2: "field value 2", field name 3: "field value 3", ... },  
12.         {field name 1: "field value 1", field name 2: "field value 2", field name 3: "field value 3", ... },  
13.         {field name 1: "field value 1", field name 2: "field value 2", field name 3: "field value 3", ... },  
14.         {field name 1: "field value 1", field name 2: "field value 2", field name 3: "field value 3", ... },  
15.         {field name 1: "field value 1", field name 2: "field value 2", field name 3: "field value 3", ... }  
16.     ]  
17. }  

Get the value of the string DS and implement the code:

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1. JSONObject jsonObject = JSONObject.fromObject(str); //String to json object  
2. String data = jsonObject.getString( "DS" ); //Get DS content  
3. JSONArray jsonArray = JSONArray.fromObject(data); //And take out the DS content and convert it to a json array  
4. for  ( int  i =  0 ; i < jsonArray.size(); i++) {      //traverse the contents of the json array  
5.     JSONObject object = jsonArray.getJSONObject(i);  
6.     System.out.println(object.getString("字段名1"));  
7. }