CODEWITHSUNDEEP
javajson
tomtetomte
tomtetomte

Reputation: 3

Get data from JSONObject

I have a JSONObject and want to get a String out of it and save it.

SelVehicleJSON (JSONObject):
{
  "selVehicle":
  {
     "_id":"5b38be73257303206ce9b8f9",
     "userId":"5b34c591cb6084255857e338"
  }
}

I tried

String vehicleId = selVehicleJSON.getString("_id");

but I get the error

W/System.err: org.json.JSONException: No value for _id`.

What am I doing wrong?

Upvotes: 0

Views: 165

Answers (3)

Thiru
Thiru

Reputation: 2699

The hierarchy seems to be

selVehicle._id

Or set the root before doing

selVehicleJSON.getString("_id");

Edit 1

Try using JsonPath. It makes the life easier and keeps the code clean. In your case, the code will look like:

public String getValue(JSONObject json, String path) {
    return JsonPath.read(json.toString(), path);
}

Upvotes: 1

Kishore Mohanavelu
Kishore Mohanavelu

Reputation: 457

You have two json objects. The outer one is selVehicle and there is a inner json object. So first get the outer json object and use getString on the returned json object.

Try to use this:

import java.io.File;
import static org.apache.commons.io.FileUtils.readFileToString;
import org.json.JSONObject;

File file = new File("Input your json filePath here");
String text = readFileToString(file);
JSONObject jsonObject = new JSONObject(text);
jsonObject = jsonObject.getJSONObject("selVehicle");
System.out.println(jsonObject.getString("_id"));

Upvotes: 0

Artory
Artory

Reputation: 875

You should try this :

JSONObject selVehicle =  selVehicleJSON.get("selVehicle");

String id = selVehicle.get("_id");

Upvotes: 0

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