Servlet code for the login page.

gistfile1.java

package com.myshop.servlets;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

//import com.shoppe.DAO.DAObject;

/**
 * Servlet implementation class LoginServlet
 */
@WebServlet(description = "Java Servlet that handles the User login", urlPatterns = { "/LoginServlet" }) // This code is autmatically aded by Eclipse
													 // Basically, it lets the program know how to call this Servlet
public class LoginServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	// Create private fields to store username and password
	private String uname = "";
	private String pwd = "";
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public LoginServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// Call the doProcess method which handles the checking
		doProcess();
	}
	
	protected void doProcess (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// Get the current session object from the 'HttpServletRequest' object 'request' that is available
		HttpSession session = request.getSession();
		
		// Get the username and password
		// Note: we should provide the same name (uname & pwd in this example) that the HTML (or JSP) passes
		// Remember in the HTML page we have :
		// <td align="middle"><input type="text" name="uname" size="32"  value=""></td>
		// <td align="middle"><input type="password" name="pwd" size="32" value=""></td>
		uname = request.getParameter("uname");
		pwd = request.getParameter("pwd");
		
		// Add the username and password as attributes to the session object
		session.setAttribute("uname", uname);
		session.setAttribute("pwd", pwd);
		// For now, we are hard-coding the authentication!!! Later it will be modified to a DAO object
		if (uname.equals("user1" && pwd.equals("user1")) {
			// If authentication succeeds, we want to proceed to the ShoppingArea
			RequestDispatcher requestDispatcher = request.getRequestDispatcher("ShoppingArea.jsp");
			requestDispatcher.forward(request, response);
		}
		else {
			// If authentication fails, we will return the user to the index page (LoginPage) itself
			response.sendRedirect("index.html");
		}
	}

}

Servlet code for LoginPage