📄 cashierservlet.java
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/* * Copyright 2007 Sun Microsystems, Inc. * All rights reserved. You may not modify, use, * reproduce, or distribute this software except in * compliance with the terms of the License at: * http://developer.sun.com/berkeley_license.html */package com.sun.bookstore1.servlets;import java.io.*;import java.util.*;import javax.servlet.*;import javax.servlet.http.*;import com.sun.bookstore.cart.*;import com.sun.bookstore.cart.ShoppingCart;import com.sun.bookstore1.util.Currency;/** * An HTTP Servlet that responds to the GET method 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(); ResourceBundle messages = (ResourceBundle) session.getAttribute( "messages"); ShoppingCart cart = (ShoppingCart) session.getAttribute("cart"); if (cart == null) { cart = new ShoppingCart(); session.setAttribute("cart", cart); } // set content-type header before accessing Writer response.setContentType("text/html"); PrintWriter out = response.getWriter(); Currency c = (Currency) session.getAttribute("currency"); if (c == null) { c = new Currency(); c.setLocale(request.getLocale()); session.setAttribute("currency", c); } c.setAmount(cart.getTotal()); // then write the data of the response out.println( "<html>" + "<head><title>" + messages.getString("TitleCashier") + "</title></head>"); // Get the dispatcher; it gets the banner to the user RequestDispatcher dispatcher = getServletContext() .getRequestDispatcher("/banner"); if (dispatcher != null) { dispatcher.include(request, response); } // Print out the total and the form for the user out.println( "<p>" + messages.getString("Amount") + "<strong>" + c.getFormat() + "</strong>" + "<p>" + messages.getString("Purchase") + "<form action=\"" + response.encodeURL(request.getContextPath() + "/bookreceipt") + "\" method=\"post\">" + "<table summary=\"layout\">" + "<tr>" + "<td><strong>" + messages.getString("Name") + "</strong></td>" + "<td><input type=\"text\" name=\"cardname\"" + "value=\"Gwen Canigetit\" size=\"19\"></td>" + "</tr>" + "<tr>" + "<td><strong>" + messages.getString("CCNumber") + "</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=\"" + messages.getString("Submit") + "\"></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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