Untitled

@WebServlet("/Login")
public class Login extends HttpServlet {
static Connection con = null;
static Statement st = null;
static PreparedStatement ps = null;
static String driver = "oracle.jdbc.driver.OracleDriver";
static String url = "jdbc:oracle:thin:@localhost:1521:xe";
static String userName = "SYSTEM";
static String password = "sys";

private static final long serialVersionUID = 1L;

protected void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
    PrintWriter out = response.getWriter();
    HttpSession session = request.getSession(true);
    RequestDispatcher rd;

    try {
        Class.forName(driver);
        con= DriverManager.getConnection(url, userName, password);
        System.out.println("Connected to the database");
        st=con.createStatement();
        String username = request.getParameter("username");
        String pwd = request.getParameter("pwd");
        ps=con.prepareStatement("select * from users where username=? and
pwd=?");
        ps.setString(1, username);
        ps.setString(2, pwd);
        ResultSet rs = ps.executeQuery();
        //For admin
        if (rs.next())
        {
            if(rs.getString("username").equals("admin")&&
rs.getString("pwd").equals("admin"))
            {
                session.setAttribute("user", "admin");
                rd=request.getRequestDispatcher("adminhome.jsp");
                rd.forward(request,response);
            }
            else
            {
            session.setAttribute("user", username);

            String uname=rs.getString("uname");//Get Username from DB
            session.setAttribute("flash_message",uname);
            session.setAttribute("flash_type", "Welcome");
            rd=request.getRequestDispatcher("menswear.jsp");
            rd.forward(request,response);
            }
        }
        else
        {
            session.setAttribute("flash_message", "Wrong username or
password");
            session.setAttribute("flash_type", "error");
            response.sendRedirect("login.jsp");
        }

        }
    catch(Exception e) {
        e.printStackTrace();
        out.println("error" + e);
    } finally {
        out.close();
    }
}
}

<body>
<h4 align="center">MEN'S WEAR</h4>
<table>
<tr>
<form action="AddToCart" method="post">
<td id="items"><img src="m1.jpg">
<br><br>Casual T-shirt for men<br>Rs.899
<br><br><input type="submit" value="Add to Cart">
<input type="hidden" name="name" value="Casual T-shirt for men">
<input type="hidden" name="price" value="899">
<input type="hidden" name="jspname" value="menswear.jsp">
</td>
</form>
<form action="AddToCart" method="post">
<td id="items"><img src="m2.jpg">
<br><br>OLYMP Hemden body fit-Business Shirt<br>Rs.1,299
<br><br><input type="submit" value="Add to Cart">
<input type="hidden" name="name" value="OLYMP Hemden body fit-Business
Shirt">
<input type="hidden" name="price" value="1299">
<input type="hidden" name="jspname" value="menswear.jsp">
</td>
</form>
<form action="AddToCart" method="post">
<td id="items"><img src="m3.jpg">
<br><br>Men's Party wear<br>Rs.799
<br><br><input type="submit" value="Add to Cart">
<input type="hidden" name="name" value="Men's Party wear">
<input type="hidden" name="price" value="799">
<input type="hidden" name="jspname" value="menswear.jsp">
</td>
</form>
</tr>
<tr>
<form action="AddToCart" method="post">
<td id="items"><img src="m4.jpg">
<br><br>Marriage Dress for men<br>Rs.1,599
<br><br><input type="submit" value="Add to Cart">
<input type="hidden" name="name" value="Marriage Dress for men">
<input type="hidden" name="price" value="1599">
<input type="hidden" name="jspname" value="menswear.jsp">
</td>
</form>
<form action="AddToCart" method="post">
<td id="items"><img src="m5.jpg">
<br><br>Men's Sports T-Shirt<br>Rs.899
<br><br><input type="submit" value="Add to Cart">
<input type="hidden" name="name" value="Men's Sports T-Shirt">
<input type="hidden" name="price" value="899">
<input type="hidden" name="jspname" value="menswear.jsp">
</td>
</form>
<form action="AddToCart" method="post">
<td id="items"><img src="m6.jpg">
<br><br>Love Moschino-Pre Fall Winter Men<br>Rs.2,000
<br><br><input type="submit" value="Add to Cart">
<input type="hidden" name="name" value="Girl's Cotton wear">
<input type="hidden" name="price" value="2000">
<input type="hidden" name="jspname" value="menswear.jsp">
</td>
</form>
</tr>
</table>
</body>

package com.fashionhub;

import java.io.*;
import java.util.HashMap;
import javax.servlet.*;
import javax.servlet.http.*;

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

static HashMap<String, Integer>cartItems;
AddToCart shoppingCart;

public AddToCart()
{
    cartItems=new HashMap<>();
}

protected void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
    HttpSession session=request.getSession(false);
    RequestDispatcher rd;

    shoppingCart =(AddToCart) session.getAttribute("cart");
    if(shoppingCart == null)
    {
      shoppingCart = new AddToCart();
      session.setAttribute("cart",shoppingCart);
    }
    String name = request.getParameter("name");
    Integer price = Integer.parseInt(request.getParameter("price"));
    shoppingCart.addToCart(name, price);
    session.setAttribute("flash_message", "Item Added Sucessfully");
    session.setAttribute("flash_type", "success");

    //Refferer to goback to previous jsp page
    String jspName = request.getParameter("jspname");
    rd = request.getRequestDispatcher(jspName);
    rd.forward(request, response);
}

public void addToCart(String itemid,int price)
{
    cartItems.put(itemid, price);
}
public static HashMap<String, Integer>getCartItems()
{
        return cartItems;
}
}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@page import="java.util.HashMap" session="true" %>
<%@page import="com.fashionhub.AddToCart" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Cart</title>
<style>
//Css code...
</style>
</head>
<body>
<%
response.setHeader("Cache-Control", "no-cache,no-store,must-revalidate");

if(session.getAttribute("user")==null)
    response.sendRedirect("login.jsp");
%>
<header>
<table>
<tr>
<td><img src="logo.jpg" width="70px" height="100px"></td>
<td><marquee  behavior="alternate" width="900px"><img src="name.png"
width="250px" height="100px"></marquee></td>
</tr>
</table>
<nav>
<ul>
    <li><a id="nav" href="userhome.jsp">Home</a>
    <li><a id="nav" href="menswear.jsp">Men's Wear</a>
    <li><a id="nav" href="womenswear.jsp">Women's Wear</a>
    <li><a id="nav" href="kidswear.jsp">Kid's Wear</a>
    <li><a id="nav" href="Logout">Log Out</a>
    <li><a href="viewcart.jsp"><img src="cart.jpg" width="120px"
height="68px"></a>
</ul>
</nav>
</header>
<br>
<form action="invoice.jsp" method="post">
<%
HashMap<String, Integer> items = AddToCart.getCartItems();
%>

<table id="cart" align="center">
<th id="table_th" colspan="2">YOUR CART</th>
<%

if(items!=null)
{%>
    <tr><td id="cart_head">PRODUCT NAME</td><td id="cart_head">PRICE</td>
</tr>
 <%
    for(String key: items.keySet())
    {
%>
    <tr><td id="cart_td"><%=key %></td><td id="cart_td">Rs.<%=
items.get(key)%></td></tr>
 <% }
 %>
    <tr><td>&nbsp;</td></tr>
    <tr><td id="cart_td"><input type="submit" value="Check Out"></td></tr>
 <%
}
else
{
 %>
    <tr><td>**** Your cart is Empty ****</td></tr>
 <%
}

 %>
</table>
</form>
</body>
</html>

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
@WebServlet("/Logout")
public class Logout extends HttpServlet {
private static final long serialVersionUID = 1L;

protected void doGet(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
    HttpSession session = request.getSession(false);

    if (session != null)
        {
        session.invalidate();
        }
        response.sendRedirect("index.html");
}

}