Create a Database Connection by Passing a DataSource Object

 
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.DriverManager;
public Connection getConnection(DataSource dataSource)
   {
       String url = "Your_database_url";
       String driver = "Your_database_driver";
       String username = "Your_database_user";
       String pwd = "Your_database_password";
       Connection conn = null;   //Creating a connection object
       if(dataSource == null)  //If datasource does not exist, getting the database connection directly
from database using DriverManager
        {
            try{
                Class.forName(driver);
                conn = DriverManager.getConnection(url, username, pwd);
                conn.setAutoCommit(false);
            }catch(Exception e){e.printStackTrace();}
         }
        else
         { 	//If datasource exists, get the connection from datasource
            try{
                conn = dataSource.getConnection();
                conn.setAutoCommit(false);
                MESACLog.ACLog('d',"Connected");
            }catch(java.sql.SQLException connex){//Connection Pool may be exhausted.
         }
       return conn;
    }