cartservlet.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 com.ebook.Entity.*;
import com.ebook.Util.*;
import javax.servlet.http.HttpSession;

/**
 *
 * @author 闅嗙
 */
public class CartServlet extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
      String action=request.getParameter("action");
      if(action.equals("addcart"))
      {
          addCart(request,response);
      }
        if(action.equals("deleteone"))
      {
          deleteOne(request,response);
      }
        if(action.equals("deleteall"))
      {
          deleteAll(request,response);
      }
      else
      {
          
      }

    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }
      public void addCart(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
         request.setCharacterEncoding("UTF-8");
        HttpSession session = request.getSession();
        shopCart cart = (shopCart) session.getAttribute("cart");
        if (cart == null) {
            cart = new shopCart();
            session.setAttribute("cart", cart);
        }
        int num = Integer.parseInt(request.getParameter("num"));
        int id = Integer.parseInt(request.getParameter("bookid"));
        cartItem item = new cartItem();
        item.setBookname(request.getParameter("bn"));
        item.setBeforePrice(request.getParameter("yp"));
        item.setNowPrice(request.getParameter("np"));
        // item.setTotalPrice(num * Integer.parseInt(book.getNowPrice()));
        item.setBookid(id);
        item.setQuantity(num);
        item.setTotalPrice(item.getQuantity()*Integer.parseInt(request.getParameter("np")));
        cart.addcartItem(item);
        response.sendRedirect("/eBook/showCartServlet");
    }
       public void deleteOne(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
         int bookid=Integer.parseInt(request.getParameter("bookid"));
         HttpSession session = request.getSession();
         shopCart cart = (shopCart) session.getAttribute("cart");
         cart.removeItem(bookid);
         response.sendRedirect("/eBook/showCartServlet");
        
    }
         public void deleteAll(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
         HttpSession session = request.getSession();
         shopCart cart = (shopCart) session.getAttribute("cart");
         cart.removeAll();
         response.sendRedirect("/eBook/showCartServlet");
        
    }
       
}