How to remove json key value pair from json object array using java

Question

I want to remove "status": "new" from JSON that I have stored in jsonObject using

        JSONParser parser = new JSONParser();
        Object obj = parser.parse(responseStr);
        jsonObject =  (JSONObject) obj;

JSON structure --

{"actionName": "test"
"Data": [{

    "isActive": true,
    "Id": "1358",
    "status": "new"
}],

}

new JSON should look like this -

{"actionName": "test"
"Data": [{

    "isActive": true,
    "Id": "1358"
    
}],

}

I have tried jsonObj.remove("status") , but no luck.

Answer 1

jsonObj.getJSONArray("Data").get(0).remove("status);

#Updated Code-breakdown:

JSONObject obj= (JSONObject) jsonObj.getJSONArray("Data").get(0);
   obj.remove("status");

   JSONArray newArr=new JSONArray();
   newArr.put(obj);
   jsonObj.put("Data", newArr);

It should do your work, haven't tested though. First, your Data is JSONArray, retrieving that by jsonObj.getJSONArray("Data") , then access the array with get(0) [assuming, your array will contain only one entry like your example] and finally, removing that key by remove method.

Answer 2

You need to iterate over Data property which is a JSON Array and remove for every item status key.

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;

import java.io.File;
import java.io.FileReader;

public class JsonSimpleApp {
    public static void main(String[] args) throws Exception {
        File jsonFile = new File("./resource/test.json").getAbsoluteFile();

        JSONParser parser = new JSONParser();
        JSONObject root = (JSONObject) parser.parse(new FileReader(jsonFile));
        JSONArray dataArray = (JSONArray) root.get("Data");
        dataArray.forEach(item -> {
            JSONObject object = (JSONObject) item;
            object.remove("status");
        });

        System.out.println(root);
    }
}

Above code prints:

{"Data":[{"Id":"1358","isActive":true}],"actionName":"test"}