Dinesh on Java

In this tutorial we will see that JSON format convert to the DBObject of MongoDB. Using “com.mongodb.util.JSON” class to convert JSON data directly to a DBObject.
For example, data represent in JSON format :

{
   "empName" : "Dinesh Rajput",
   "empAge"  : 26,
   "salary"  : 70000
}

To convert it to DBObject, you can code like this :

DBObject dbObject = (DBObject) JSON.parse("{"empName" : "Dinesh Rajput",
   "empAge"  : 26,
   "salary"  : 70000}");

Create a Java class to convert JSON Data To DBObject.

package com.dineshonjava.mongo.test;

import java.net.UnknownHostException;

import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
import com.mongodb.util.JSON;

/**
 * @author Dinesh Rajput
 *
 */
public class JSONDocumentDemo {

 public static void main(String[] args) {
 
 try {
 
  Mongo mongo = new Mongo("localhost", 27017);
  DB db = mongo.getDB("dineshonjavaDB");
 
  // get a single collection
  DBCollection collection = db.getCollection("empCollection");

  // convert JSON to DBObject directly
  DBObject dbObject = (DBObject) JSON.parse("{'empName':'Dinesh Rajput', 'empAge': 26,'salary':70000}");
 
  collection.insert(dbObject);
 
  DBCursor cursorDoc = collection.find();
  while (cursorDoc.hasNext()) {
   System.out.println(cursorDoc.next());
  }
 
  System.out.println("Done");
 
  } catch (UnknownHostException e) {
   e.printStackTrace();
  } catch (MongoException e) {
   e.printStackTrace();
  }
 
 }

}

If everything is fine then we will get the following output on the console.

Download Source Code + Libs
MongoDBJSONDemo.Zip