How to externalize mongo db queries - mongodb

Question

I want to externalize complete mongo db query.
I know that we can externalize by splitting query into $project, $filter ,$sort and so on...
But I want the whole query to be externalized.
For example,
db.employee.find({dept:'FINANCE'},{empId:1,empName:1,empDesn:1}).sort({empSal:1}),
Here I want to externalize this mongo query, please share your thought how to achieve it using java.

Answer 1

I connect to mongodb using java for read and right. We use mongo-java-driver-2-XX.jar to connect it
sample code is :
import com.mongodb.MongoClient;
import com.mongodb.MongoException;
import com.mongodb.WriteConcern;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;
import com.mongodb.DBCursor;
import com.mongodb.ServerAddress;
import java.util.Arrays;
public class MongoDBJDBC{
public static void main( String args[] ){
try{
// To connect to mongodb server
MongoClient mongoClient = new MongoClient( "localhost" , 27017 );
// Now connect to your databases
DB db = mongoClient.getDB( "test" );
System.out.println("Connect to database successfully");
boolean auth = db.authenticate(myUserName, myPassword);
System.out.println("Authentication: "+auth);
}catch(Exception e){
System.err.println( e.getClass().getName() + ": " + e.getMessage() );
}
}
}
For more details check this link