Web Application in Java with JDBC, Servlets, JSp and MYSQL DataBase-5

Registration.java:


import java.io.*;
   import java.sql.*;
   import javax.servlet.*;
   import javax.servlet.http.*;
   public class Registration extends HttpServlet {
    Connection con=null;
    Statement st=null;
    ResultSet rs=null;
    RequestDispatcher rd=null;
    public void doPost(HttpServletRequest req, HttpServletResponse res) throws IOException,ServletException {
    String userid= req.getParameter("userid");
        String passid= req.getParameter("passid");
        String username= req.getParameter("username");
    String email= req.getParameter("email");
        String mob= req.getParameter("mob");
        System.out.println(mob+" "+ userid+" "+passid+" "+username+" "+email);

    RequestDispatcher rd;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            con = DriverManager.getConnection("jdbc:mysql://localhost:3306/employee","root","password");
            st = con.createStatement();
             System.out.println(con);      
             int add=st.executeUpdate("insert into userlogin values('"+userid+"','"+passid+"','"+username+"','"+email+"','"+mob+"')");
          System.out.println(add);
          res.sendRedirect("Register_Page.jsp?Message=success");
         
           // rd=req.getRequestDispatcher("Login_Page.jsp");
          //rd.forward(req,res);
        } catch(Exception e2) {
             rd=req.getRequestDispatcher("Register_Page.jsp");
        }
    }
}