Spring Hibernate Connection

package com.rsia.madura.config;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.*;
import javax.servlet.http.*;

import java.sql.*;

@WebServlet("/TestConnection")
public class ConnectionConfig extends HttpServlet{
    private static final long serialVersionUID = 1L;


    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        String user = "postgres";
        String pass = "postgre";
        String jdbcURL = "jdbc:postgresql://localhost:5432/rsia_madura";

        String driverDB = "org.postgresql.Driver";

        try {
            PrintWriter out = response.getWriter();

            out.println("Try to connect " + jdbcURL);

            Class.forName(driverDB);

            Connection conn = DriverManager.getConnection(jdbcURL, user, pass);

            out.println("Succes");

            conn.close();
        }catch(Exception e) {
            e.printStackTrace();
            throw new ServletException(e);
        }
    }


}