jsp+bean的购物车

package com.servlet; import java.io.IOException; import java.io.PrintWriter; import com.gxut.*; import java.util.*; import java.text.SimpleDateFormat; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class ConfirmServlet extends HttpServlet { /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Map<Integer,Book> books =(TreeMap<Integer,Book>)request.getSession().getAttribute("books"); ShoppingCart cart =(ShoppingCart)request.getSession().getAttribute("cart"); User user=(User)request.getSession().getAttribute("user"); if(cart!=null && user!=null){ double cost = cart.getCost(books); Orderform order = new Orderform(); order.setCost(cost); order.setUserid(user.getId()); order.setOrderdate(new java.util.Date()); String id =produceId(user.getId());//用时间和用户编号产生唯一定单号 order.setId(id); Collection<com.gxut.Orderline> c = cart.getOrderlines(); for(com.gxut.Orderline orderline : c){ Book book = books.get(new Integer(orderline.getBookid())); } } } private String produceId(int userid){ String time =new SimpleDateFormat("yyyyMMddkkmm").format(new Date()); String id=""+userid+time; return id; } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } }