/* Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved. This software is the confidential and proprietary information of Sun Microsystems, Inc. ("Confidential Information"). You shall not disclose such Confidential Information and shall use it only in accordance with the terms of the license agreement you entered into with Sun. SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. CopyrightVersion 1.0 */ import java.io.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; import database.*; import cart.*; /** * An HTTP servlet that displays the contents of a customer's shopping * cart at Duke's Bookstore. It responds to the GET and HEAD methods of * the HTTP protocol. This servlet calls other servlets. */ public class ShowCartServlet extends HttpServlet { public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // Get the user's session and shopping cart HttpSession session = request.getSession(true); ShoppingCart cart = (ShoppingCart)session.getValue(session.getId()); // If the user has no cart, create a new one if (cart == null) { cart = new ShoppingCart(); session.putValue(session.getId(), cart); } // set content type header before accessing the Writer response.setContentType("text/html"); PrintWriter out = response.getWriter(); //Print out the response out.println("" + "Your Shopping Cart" + "" + "

 " + "

" + "Duke's " + "Bookstore" + "

" + "
" + "
 

 "); /* Handle any pending deletes from the shopping cart and indicate the outcome as part of the response */ String bookId =request.getParameter("Remove"); if (bookId != null) { cart.remove(bookId); BookDBServlet database = (BookDBServlet) getServletConfig().getServletContext().getServlet("bookdb"); BookDetails book = database.getBookDetails(bookId); out.println("" + "You just removed: " + book.getTitle() + "
 
" + ""); } else if (request.getParameter("Clear") != null) { cart.clear(); out.println("" + "You just cleared your shopping cart!" + "
 
"); } // Print a summary of the shopping cart int num = cart.getNumberOfItems(); if (num > 0) { out.println("" + "You have " + num + (num==1 ? " item" : " items") + " in your shopping cart " + ""); // Return the Shopping Cart Nice and Pretty out.println("" + "" + "" + "" + "" + ""); Enumeration e = cart.getItems(); while (e.hasMoreElements()) { ShoppingCartItem item = (ShoppingCartItem) e.nextElement(); BookDetails bookDetails = (BookDetails) item.getItem(); out.println("" + "" + "" + "" + ""); } // Print the total at the bottom of the table Cashier cashier = new Cashier(cart); out.println("" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "
QuantityTitlePrice
" + item.getQuantity() + "" + "" + bookDetails.getTitle() + "" + "" + Cashier.format(bookDetails.getPrice()) + "" + "" + "Remove Item" + "
" + "
" + "Subtotal:" + cashier.format(cashier.getAmount()) + "
" + "CA Sales Tax:" + cashier.format(cashier.getTax()) + "
" + "" + "Grand Total:" + cashier.format(cashier.getTotal()) + "
"); // Where to go and what to do next out.println("

 

See the Catalog      " + "Check Out      " + "Clear Cart"); } else { // Shopping cart is empty! out.println("" + "There is nothing in your shopping cart." + "
 
" + "

Back to the Catalog
"); } out.println(" "); out.close(); } public String getServletInfo() { return "The ShowCart servlet returns information about" + "the books that the user is in the process of ordering."; } }