Login using derby database for web app (netbeans)

Question

I'm trying to log in using data from a derby database , I set up but the servlet 'loginservlet' doesn't seem to be picking up the database. Is there a problem with my code?

Code from the loginservlet:

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
/**
 *
 * @author billemerson
 */
public class LoginServlet extends HttpServlet  {
    public void doPost(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException { 
 try 
 {
     Class.forName("org.apache.derby.jdbc.ClientDriver");
     Connection conn = DriverManager.getConnection("jdbc:derby://localhost:1527/HOUSEPLANTSIRELAND","houseplant","pass");
     PreparedStatement ps = conn.prepareStatement("SELECT * FROM HOUSEPLANT.USERDATA WHERE EMAIL=? AND PASSWORD=?");
        String EMAIL = req.getParameter("email");
        String PASSWORD = req.getParameter("password");
        ps.setString(4,EMAIL);
        ps.setString(5,PASSWORD);
        ResultSet rs = ps.executeQuery();
        if(rs.next())
        {           
            res.sendRedirect("adminhome.jsp");   
        }
        else {
            res.sendRedirect("index.html");
        }
        catch (Exception e)
        {
            System.out.println(e.getMessage());           
    }
    }
}

Answer 1

I think the parameter number is the problem. Your sql excerpt:

WHERE EMAIL=? AND PASSWORD=?

PreparedStatement parameters are counted from 1. The first question mark is 1, second is 2, and so on. So the code will be:

    ps.setString(1,EMAIL);
    ps.setString(2,PASSWORD);