How to make a nested Json object in Java?

Question

I want to program a nested JSON Object for my Android device, but how? I have only basic experience with Json, so I would appreciate if someone could help me with the following code:

{ 
 "command": "login",
 "uid": "123123123",
 "params":
  {
   "username": "sup",
   "password": "bros"
  }
}

Edit:

The following code does solve the problem:

loginInformation = new ArrayList<NameValuePair>(); 

JSONObject parentData = new JSONObject();
JSONObject childData = new JSONObject();

try {

    parentData.put("command", "login");
    parentData.put("uid", UID.getDeviceId());

    childData.put("username", username.getText().toString());
    childData.put("password", password.getText().toString());
    parentData.put("params", childData);

} catch (JSONException e) {
    e.printStackTrace();
}

loginInformation.add(new BasicNameValuePair("content", parentData.toString()));

Do you try to communicate with service using json? Do you realy need to send so dificult structure? — Alex Klimashevsky, Mar 29 '12 at 14:37
Are you kidding me? WHAT is so difficult with sending a nested JSON object!? — Aerial, Mar 31 '12 at 17:46

score 6 · Accepted Answer · answered Mar 29 '12 at 14:36

6

You need to create a JSON, and add that JSON as a parameter in your POST. To do that you should probably :

post.add(new BasicNameValuePair("data",json.toString());

You could use org.json.JSONObject, it is included in the Android SDK.

answered Mar 29 '12 at 14:36

Ovidiu Latcu

71,607
15
76
84

1

Thanks, I meant nested instead of multidimensional. :) – Aerial Mar 31 '12 at 20:58
@Ovidiu Latcu Please Check my question http://stackoverflow.com/questions/15171454/sending-complex-json-object – bCliks Mar 06 '13 at 09:24
@OvidiuLatcu can you please check my question [http://stackoverflow.com/questions/42024158/how-to-access-github-graphql-api-using-java] – Kasun Siyambalapitiya Feb 06 '17 at 06:15

score 1 · Answer 2 · answered Oct 23 '14 at 13:04

Create a Model Class for the Json, initialize it with your data. Then use Google Gson to convert it toJson also from Json to Back to the Object. and also here are two links which make your life more Easier for using Json. Online Json Editor. You can check that generated json is in the correct format or not. http://www.jsoneditoronline.org/ And Json to POJO Generated (Model Class Generator) http://www.jsonschema2pojo.org/

score 1 · Answer 3 · edited Jul 14 '21 at 16:59

BasicNameValuePair is what you use to add POST parameters. It's a little unclear what you are asking. are you asking how, given that JSON, to submit the param values as post parameters?

You need to first parse the JSON, then pull out the parameters, then add them to the form post, like this,

JSONObject jo = new JSONObject(jsonString);
JSONObject joParams = jo.getJSONObject("params");
String username = joParams.getString("username");

post.add(new BasicNameValuePair("username",username);

You will of course want to do checking on the JSON to ensure the params object exists, and to ensure the username parameter exits.

score 0 · Answer 4 · answered Mar 29 '12 at 14:45

If you just want to send a block of JSON to the server you should not use key value pairs but just post the data as a StringEntity.

    HttpPost request = new HttpPost(api_call);

    request.setHeader("Content-Type", "text/javascript");
    request.setEntity(new StringEntity(jsonString);

    httpClient.execute(request);

How to make a nested Json object in Java?

4 Answers4

Linked