Json string parsing to java object with multiple objects

Question

Trying to parse the following json string to java object using gson

{
    \"entry\": \"132456\",
    \"product\": {
        \"item\": \"123456\",
        \"p         


        

Answer 1

Try this JSON:

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

With this Java Class:

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;
            }
        }
    }
}

Works like a charm

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);
}

Output:

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)