Java+MySql+servlet połączenie

package logowanie;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class logowanie extends HttpServlet {

    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://127.0.0.1:3306/sale_konf";
    static final String login = "root";
    static final String pass = "";
    private static final long serialVersionUID = 1L;

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException {
        Connection conn = null;
        Statement stmt = null;
        String Login = req.getParameter("login");
        String Pass = req.getParameter("pass");
        
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection(DB_URL, login, pass);
            stmt = conn.createStatement();
            String sql = "SELECT login, pass FROM users WHERE login='"+Login+"' and pass='"+Pass+"'";
            ResultSet rs = stmt.executeQuery(sql);

            try (PrintWriter pw = res.getWriter()) 
            {
                res.setContentType("text/html");
                
                
                if (Login!=null && Pass!=null)
                {
                req.getRequestDispatcher("http://localhost:8080/WebApplication1/faces/Przekierowanie1.jsp"); //po poprawnym zalogowaniu ma następić przekierowanie na Przekierowanie1
                }
                else
                {
                    pw.println("Login Failed...!");
                }
            }
            conn.close();
        } catch (ClassNotFoundException | SQLException e) {
        }

    }

}

  } catch (ClassNotFoundException | SQLException e) {
        }

<form action="logowanie" method="POST" id='log'>
            <text style="position: absolute; left: 350px; top: 300px"> LOGIN </text>
            <input id='login' style="position: absolute; left: 420px; top: 300px"> 
            <text style="position: absolute; left: 350px; top: 340px"> HASŁO </text>
            <input id='pass' style="position: absolute; left: 420px; top: 340px" type="password" value="" />
            <input style="position: absolute; left: 350px; top: 400px" type="submit" onclick='log' value="Zaloguj się"  />
            </form>

 
try{
Class.forName(nazwa_sterownika);
}catch(Exception ex){
}