showcartservlet.java

jsp+servlet网上购物,是一个实现mvc的网站

package com.ebook.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.ebook.Util.*;
import java.util.*;
import com.ebook.Entity.*;

public class showCartServlet extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

            HttpSession session = request.getSession();
            shopCart cart = (shopCart) session.getAttribute("cart");
            if (cart == null) {
                request.setAttribute("error", "购物车中没有任何物品");
                     request.getRequestDispatcher("error.jsp").forward(request, response);
                     return;
            }
         
           // }
         //    try {
            ArrayList<cartItem> all = cart.getCart();
            request.setAttribute("all", all);
            String total=String.valueOf(cart.getTotal());
            request.setAttribute("total", total);
            request.getRequestDispatcher("showCart.jsp").forward(request, response);
      //  } catch (Exception e) {
       //       request.getRequestDispatcher("getError.jsp").forward(request, response);
     //   }

    }

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}