additemtocartaction.java

这是一个购物车的源码

package com.tarena.shoppingcart.action;
import org.apache.struts.action.*;
import org.apache.struts.actions.*;
import javax.servlet.http.*;
import com.tarena.shoppingcart.entity.*;
import java.util.*;

public class AddItemToCartAction extends Action{
	public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response){
		ActionForward forward=null;
		try {
			HttpSession session=request.getSession(false);
			Integer  id=Integer.valueOf(request.getParameter("id"));
			String  name=request.getParameter("name");
			String description = request.getParameter("description");
			double price=Double.parseDouble(request.getParameter("price"));
			Product product=new Product(id,name,description,price);
			Cart  cart=(Cart)session.getAttribute("cart");
			cart.addItem(product, id);
			forward=mapping.findForward("toList");
		}catch(Exception e){
			e.printStackTrace();
			forward=mapping.findForward("error");
		}
		return forward;
	}
}