import java.io.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; import database.*; import cart.*; public class ShowMyCartServlet 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."; } }