📄 cashierservlet.java
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/*Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.This software is the confidential and proprietary information of SunMicrosystems, Inc. ("Confidential Information"). You shall notdisclose such Confidential Information and shall use it only inaccordance with the terms of the license agreement you entered intowith Sun.SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THESOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THEIMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULARPURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGESSUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTINGTHIS SOFTWARE OR ITS DERIVATIVES.CopyrightVersion 1.0*/import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import cart.*;/** * An HTTP Servlet that responds to the GET and HEAD methods of the * HTTP protocol. It returns a form to the user that gathers data. * The form POSTs to another servlet. */public class CashierServlet 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 Writer response.setContentType("text/html"); PrintWriter out = response.getWriter(); // then write the data of the response out.println("<html>" + "<head><title> Cashier </title></head>" + "<body bgcolor=\"#ffffff\">" + "<center>" + "<hr> <br> " + "<h1>" + "<font size=\"+3\" color=\"red\">Duke's </font>" + "<font size=\"+3\" color=\"purple\">Bookstore</font>" + "</h1>" + "</center>" + "<br> <hr> <br> "); // Determine the total price of the user's books Cashier cashier = new Cashier(cart); double total = cashier.getTotal(); // Print out the total and the form for the user out.println("<p>Your total purchase amount is: " + "<strong>" + cashier.format(total) + "</strong>" + "<p>To purchase the items in your shopping cart," + "please provide us with the following information:" + "<form action=\"" + response.encodeUrl("/servlet/receipt") + "\" method=\"post\">" + "<table>" + "<tr>" + "<td><strong>Name:</strong></td>" + "<td><input type=\"text\" name=\"cardname\"" + "value=\"Gwen Canigetit\" size=\"19\"></td>" + "</tr>" + "<tr>" + "<td><strong>Credit Card Number:</strong></td>" + "<td>" + "<input type=\"text\" name=\"cardnum\" " + "value=\"xxxx xxxx xxxx xxxx\" size=\"19\"></td>" + "</tr>" + "<tr>" + "<td></td>" + "<td><input type=\"submit\"" + "value=\"Submit Information\"></td>" + "</tr>" + "</table>" + "</form>" + "</body>" + "</html>"); out.close(); } public String getServletInfo() { return "The Cashier servlet takes the user's name and " + "credit-card number so that the user can buy the books."; }}⌨️ 快捷键说明
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