使用MVC架构实现的网上购书实例

/* * y2javaee.sg.ch05.ProcessOrder.java * 2007-6-13 * 第5章的Java示例，处理用户的订单 */ package com.apache.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import com.apache.dao.OrderOperation; import com.apache.pojo.BookOrder; import com.apache.pojo.Creditcart; import com.apache.pojo.User; public class ProcessOrder extends HttpServlet { private static final long serialVersionUID = 1L; /** * Constructor of the object. */ public ProcessOrder() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 处理中文输入 request.setCharacterEncoding("GBK"); // 获取session HttpSession session = request.getSession(); // 获取输入的表单数据 String username = request.getParameter("username");// 用户名 String zipcode = request.getParameter("zipcode");// 邮编 // 邮编必须是数字 if (zipcode.length() != 6) { session.setAttribute("zipcodeError", "邮编必须为数字!"); request.getRequestDispatcher("/order.jsp").forward(request, response); return; } else { for (int i = 0; i < zipcode.length(); i++) { if ("0123456789".indexOf(zipcode.charAt(i)) == -1) { session.setAttribute("zipcodeError", "邮编必须为数字!"); request.getRequestDispatcher("/order.jsp").forward(request, response); return; } } } if (session.getAttribute("zipcodeError") != null) { session.removeAttribute("zipcodeError"); } String phone = request.getParameter("phone");// 电话 // 验证电话号码 if (phone.length() != 11) { session.setAttribute("phoneError", "电话号码格式错误!"); request.getRequestDispatcher("/order.jsp").forward(request, response); return; } else { for (int i = 0; i < phone.length(); i++) { if (i == 0 && !("" + phone.charAt(i)).equals("1")) { session.setAttribute("phoneError", "电话号码格式错误!"); request.getRequestDispatcher("/order.jsp").forward(request, response); return; } if (i == 1 && !(("" + phone.charAt(i)).equals("3") || ("" + phone .charAt(i)).equals("5"))) { session.setAttribute("phoneError", "电话号码格式错误!"); request.getRequestDispatcher("/order.jsp").forward(request, response); return; } } } if (session.getAttribute("phoneError") != null) { session.removeAttribute("phoneError"); } String creditcart = request.getParameter("creditcard");// 信用卡 OrderOperation oo=new OrderOperation(); Creditcart card = oo.getCreditcartById(creditcart); if (!username.equals(((User) session.getAttribute("user")).getName())) { session.setAttribute("orderError", "用户名输入错误!"); request.getRequestDispatcher("/order.jsp").forward(request, response); return; } else if (card == null) { if (session.getAttribute("orderError") != null) { session.removeAttribute("orderError"); } session.setAttribute("cardError", "信用卡号错误，请重新填写！"); request.getRequestDispatcher("/order.jsp").forward(request, response); return; } else { if (session.getAttribute("cardError") != null) { session.removeAttribute("cardError"); } // 读出总的价钱 double total = ((Double) session.getAttribute("total")) .doubleValue(); BookOrder bo = new BookOrder(); bo.setPhone(phone); bo.setTotal(total); bo.setCreditcart(card); bo.setZipcode(zipcode); bo.setUser((User) session.getAttribute("user")); // ------------------------------------- OrderOperation op = new OrderOperation(); op.saveOrder(bo); request.getRequestDispatcher("bye.jsp").forward(request, response); session.invalidate(); } } public void init() throws ServletException { // Put your code here } }