BE THE CODER > No SQL > Mongo DB Examples > How to insert a Document in Mongo Database2

MongoDB is a scalable, high-performance, open source NoSQL database. It offers Ad hoc queries, Indexing, Replication, Load balancing, File storage (GridFS), Aggregation, MapReduce and Server-side JavaScript execution. This requires the library mongo-2.8.0.jar to be present in the classpath. The following example shows how to insert a document in Mongo database.

File Name :	com/bethecoder/tutorials/mongodb/tests/InsertToCollectionTest2.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.mongodb.tests;



import java.net.UnknownHostException;



import com.mongodb.BasicDBObject;

import com.mongodb.DB;

import com.mongodb.DBCollection;

import com.mongodb.DBCursor;

import com.mongodb.DBObject;

import com.mongodb.Mongo;

import com.mongodb.MongoException;



public class InsertToCollectionTest2 {



  /**

   * @param args

   */

  public static void main(String[] args) {



    try {

      //Connect to mongoDB with given IP and PORT

      Mongo mongo = new Mongo("localhost", 27017);

      

      //Get the database object

      DB database = mongo.getDB("mytestdb");

      

      //Gets a collection with a given name.

        //If the collection does not exist, a new collection is created.

      DBCollection collection = database.getCollection("mynums");

      //collection.drop();

      

      //Create and insert document to collection

      DBObject document = null;

      int num = 0;

      

      for (int i = 0 ; i < 20 ; i ++) {

        num = i + 1;

        document = new BasicDBObject();

        

        //Assign your own id for this document

        document.put("_id", num);

        document.put("num", num);

        document.put("even", (num % 2 == 0));

        document.put("num^2", Math.pow(num, 2));

        

        //Saves a document to the database

        collection.insert(document);

      }

      

      //Queries for all objects in this collection

      DBCursor dbCursor = collection.find();

      DBObject record = null;

      

      while (dbCursor.hasNext()) {

        record = dbCursor.next();

        System.out.println(record);

      }

      

    } catch (UnknownHostException e) {

      e.printStackTrace();

    } catch (MongoException e) {

      e.printStackTrace();

    }

  }

}