Remove Map Node from JSON

Question

I am creating a JSON in Java:

    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.Map;

    import org.json.JSONArray;
    import org.json.JSONException;
    import org.json.JSONObject;

    import com.google.gson.Gson;
    String json = null;
    Map<String, String> data1 = new HashMap<String, String>();
    Map<String, String> data2 = new HashMap<String, String>();
    data1.put("name", "f1");
    data1.put("key", "aa1");
    data1.put("value", "21");
    data2.put("name", "f2");
    data2.put("key", "aa1");
    data2.put("value", "22");

    JSONObject json1 = new JSONObject(data1);
    JSONObject json2 = new JSONObject(data2);
    JSONArray array = new JSONArray();
    array.put(json1);
    array.put(json2);
    JSONObject finalObject = new JSONObject();
    try {
        finalObject.put("DeltaRealTime", array);
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    json = new Gson().toJson(finalObject);

What I get is the following:

{
    "map": {
        "DeltaRealTime": {
            "myArrayList": [{
                "map": {
                    "name": "f1",
                    "value": "21",
                    "key": "aa1"
                }
            }, {
                "map": {
                    "name": "f2",
                    "value": "22",
                    "key": "aa1"
                }
            }]
        }
    }
}

But I do not want to have all these extra "map" nodes. What I can I do to remove them? Or what I can I do that I do not have them in the first place?

Answer 1

I would suggest using an Object to JSON string converter lib like Jackson. You can get a json str in three simple steps and dont have to create any JSON objects:

Steps

1. Create a POJO class
2. Populate the POJO object

3. Convert the object to a JSON string using the method as how below:

   ObjectMapper mapper = new ObjectMapper();
   mapper.writeValueAsString(FooPOJO);

Ref: http://www.mkyong.com/java/how-to-convert-java-object-to-from-json-jackson/

Answer 2

My answer may help anyone in the future as none of the answers above worked for me. I just called toMap() on the JSONObject and all occurences of the map key were gone.

Answer 3

you can try as:

String requestBody=data1.toString(); String requestBody=data2.toString();