additemtocartaction.java

购物车程序:主要用Struts+Hibernate框架实现

package com.rmeng.shoppingCart.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.rmeng.shoppingCart.biz.SystemBiz;

import com.rmeng.shoppingCart.javabean.entity.Cart;
import com.rmeng.shoppingCart.javabean.entity.Item;
import com.rmeng.shoppingCart.javabean.entity.Product;

public class AddItemToCartAction extends Action
					{
	public ActionForward execute(ActionMapping mapping, ActionForm form, 
			HttpServletRequest request, HttpServletResponse response)throws Exception
					{
					SystemBiz systemBiz=new SystemBiz();
					
					String[] s=request.getParameterValues("item");
					
					HttpSession session=request.getSession();
					
					Cart cart=(Cart) session.getAttribute("cart");
					
					double cost = 0;
					
					for(int i=0;i<s.length;i++){
					
					int pid=Integer.parseInt(s[i]);								
					
					if(cart.getItems().get(pid)!=null)
					{
						session.setAttribute("cart",cart);				
					}else
					{
						Product product=systemBiz.findProductById(pid);			
						
						cart.addItem(new Item(product,1,product.getPrice()));
						
						cost+=product.getPrice();
						
						cart.setCost(cost);
						
						session.setAttribute("cart",cart);
					}	
						
					
					}
					return mapping.findForward("success");
				}
			}