JSON字符串解析为具有多个对象的Java对象

试试这个JSON：

{    "entry": "132456",    "product":     {        "item": "123456",        "prompts":         [ {     "promptId": "1",     "promptNumber": "109",     "promptType": 4,     "promptTypeDesc": "desc1",     "validations":     [         {  "minLen": 10,  "maxLen": 10,  "required": true          }      ]  }         ]     }}

使用此Java类：

import java.util.List;public class Info {    private String entry;    private Product product;    public class Product {        private String item;        private List<prompt> prompts;        public class prompt { private String promptId; private String promptNumber; private int promptType; private String promptTypeDes; private List<Validation> validations; public class Validation {     private int maxLen;     private int minLen;     private boolean required; }        }    }}

奇迹般有效

public static void main(String args[]){    String input = "{" + ""entry": "132456"," + ""product": {"item": "123456"," + ""prompts":[{"promptId": "1"," + ""promptNumber": "109"," + ""promptType": 4," + ""promptTypeDesc": "desc1"," + ""validations":[{"minLen": 10," + ""maxLen": 10" + ","required": true}]}]}}";    Gson gson = new GsonBuilder().setPrettyPrinting().create();    Info item = gson.fromJson(input, Info.class);    String jsonOutput = gson.toJson(item);    System.out.println(jsonOutput);}

输出：

run:{  "entry": "132456",  "product": {    "item": "123456",    "prompts": [      {        "promptId": "1",        "promptNumber": "109",        "promptType": 4,        "validations": [          { "maxLen": 10, "minLen": 10, "required": true          }        ]      }    ]  }}BUILD SUCCESSFUL (total time: 0 seconds)