📄 cashierservlet.java
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package servlets;import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import cart.*;import util.Currency;public class CashierServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 获取用户 session 和 购物车对象 HttpSession session = request.getSession(); ShoppingCart cart = (ShoppingCart) session.getAttribute("cart"); if (cart == null) { cart = new ShoppingCart(); session.setAttribute("cart", cart); } // 设置 content-type 和页面编码 response.setContentType("text/html;charset=gb2312"); 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()); // 把数据写入响应流 out.println("<html>" + "<head><title>BookStore</title></head>"); RequestDispatcher dispatcher = getServletContext() .getRequestDispatcher("/head"); if (dispatcher != null) { dispatcher.include(request, response); } // 显示购物总价和客户信用卡支付表单 out.println("<center><p>" + "购物总价：" + "<strong>" + c.getFormat() + "</strong>" + "<p>" + "请用信用卡支付：" + "<form action=\"" + response.encodeURL(request.getContextPath() + "/bookreceipt") + "\" method=\"post\">" + "<table summary=\"layout\">" + "<tr>" + "<td><strong>" + "姓名" + "</strong></td>" + "<td><input type=\"text\" name=\"cardname\"" + "value=\"lyp\" size=\"19\"></td>" + "</tr>" + "<tr>" + "<td><strong>" + "信用卡号" + "</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=\"" + "提交" + "\"></td>" + "</tr>" + "</table>" + "</form>" + "</center></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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