By B.A. Khivsara

Assistant Professor

Department of Computer Engineering

SNJB’s KBJ COE

Java MongoDB Connectivity & CRUD

operations

Outline Software Required and Steps

Create connection

Create database

Create Collection

Insert Document

Display document

Update

Remove document

Program

Software Required and Steps

Eclipse

JDK 1.6

MongoDB

MongoDB-Java-Driver

In Eclipse perform following steps:

1. File - New – Java Project –Give Project Name – ok

2. In project Explorer window- right click on project name-new- class- give Class name- ok

3. In project Explorer window- right click on project name- Build path- Configure build path- Libraries- Add External Jar - MongoDB-Java-Driver

4. Start Mongo server before running the program

Outline Software Required and Steps

Create connection

Create database

Create Collection

Insert Document

Display document

Update

Remove document

Program

Import packages, Create connection,

database and collection

Import packages

import com.mongodb.*;

Create connection

MongoClient mongo = new MongoClient( "localhost" , 27017

);

Create Database

DB db = mongo.getDB("database name");

Create Collection

DBCollection coll = db.getCollection(“Collection Name");

Outline Software Required and Steps

Create connection

Create database

Create Collection

Insert Document

Display document

Update

Remove document

Program

Insert Document

BasicDBObject d1 = new BasicDBObject(“rno“,“1”). append(“name", “Monika"). append(“age", “17”)

BasicDBObject d2 = new BasicDBObject(“rno“,“2”). append(“name", “Roshan"). append(“age", “18”)

coll.insert(d1);

coll.insert(d2);

Outline Software Required and Steps

Create connection

Create database

Create Collection

Insert Document

Display document

Update

Remove document

Program

Display document

DBCursor cursor = coll.find(searchQuery);

while (cursor.hasNext())

{

System.out.println(cursor.next());

}

Outline Software Required and Steps

Create connection

Create database

Create Collection

Insert Document

Display Document

Update Document

Remove document

Program

Update Document

BasicDBObject query = new BasicDBObject();

query.put("name", “Monika");

BasicDBObject newDocument = new BasicDBObject();

newDocument.put("name", “Ragini");

BasicDBObject updateObj = new BasicDBObject();

updateObj.put("$set", newDocument);

Coll.update(query, updateObj);

Outline Software Required and Steps

Create connection

Create database

Create Collection

Insert Document

Display Document

Update Document

Remove document

Program

Remove document

BasicDBObject searchQuery = new BasicDBObject();

searchQuery.put("name", “Monika");

Coll.remove(searchQuery);

Outline Software Required and Steps

Create connection

Create database

Create Collection

Insert Document

Display Document

Update Document

Remove document

Program

Program

import com.mongodb.*;

public class conmongo {

public static void main(String[] args) {

try {

MongoClient mongoClient = new MongoClient( "localhost" , 27017 );

DB db = mongoClient.getDB( "mydb" );

DBCollection coll = db.createCollection(“Stud",null);

BasicDBObject doc1 = new BasicDBObject("rno", "1").append("name", "Swapanil");

BasicDBObject doc2 = new BasicDBObject("rno", "2").append("name", "swati");

coll.insert(doc1);

coll.insert(doc2);

Program

DBCursor cursor = coll.find(searchQuery);

while (cursor.hasNext()) {

System.out.println(cursor.next()); }

BasicDBObject query = new BasicDBObject();

query.put("name", “Monika");

BasicDBObject newDocument = new BasicDBObject();

newDocument.put("name", “Ragini");

BasicDBObject updateObj = new BasicDBObject();

updateObj.put("$set", newDocument);

Coll.update(query, updateObj);

Program

BasicDBObject searchQuery = new BasicDBObject();

searchQuery.put("name", “Monika");

Coll.remove(searchQuery);

}

catch(Exception e)

{

e.printStackTrace();

}

}

}