Java MongoDB hello world

Java MongoDB hello world:

package com.mkyong.core;
 
import java.net.UnknownHostException;
 
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
 

public class App {
 public static void main(String[] args) {
 
  try {
   // connect to mongoDB, ip and port number
   Mongo mongo = new Mongo(“localhost”, 27017);
 
   // get database from MongoDB,
   // if database doesn’t exists, mongoDB will create it automatically
   DB db = mongo.getDB(“yourdb”);
 
   // Get collection from MongoDB, database named “yourDB”
   // if collection doesn’t exists, mongoDB will create it automatically
   DBCollection collection = db.getCollection(“yourCollection”);
 
   // create a document to store key and value
   BasicDBObject document = new BasicDBObject();
   document.put(“id”, 1001);
   document.put(“msg”, “hello world mongoDB in Java”);
 
   // save it into collection named “yourCollection”
   collection.insert(document);
 
   // search query
   BasicDBObject searchQuery = new BasicDBObject();
   searchQuery.put(“id”, 1001);
 
   // query it
   DBCursor cursor = collection.find(searchQuery);
 
   // loop over the cursor and display the retrieved result
   while (cursor.hasNext()) {
    System.out.println(cursor.next());
   }
 
   System.out.println(“Done”);
 
  } catch (UnknownHostException e) {
   e.printStackTrace();
  } catch (MongoException e) {
   e.printStackTrace();
  }
 
 }
}