productaction.java

这是一个购物车的源码

package com.tarena.shoppingcart.action;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.MappingDispatchAction;

import com.tarena.shoppingcart.dao.ShoppingCartHibernateImpl;
import com.tarena.shoppingcart.entity.*;
import com.tarena.shoppingcart.entity.User;
public class ProductAction extends MappingDispatchAction{
	private ShoppingCartHibernateImpl service = new ShoppingCartHibernateImpl();
	
	public ActionForward manager_listProduct(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
		ActionForward forward=null;
		ShoppingCartHibernateImpl service=new ShoppingCartHibernateImpl();
		try{
			List list=(List)service.listProducts();
			Cart cart=new Cart();
			if(list!=null){
				HttpSession session=request.getSession(false);
				if(session.getAttribute("cart")==null){
					session.setAttribute("cart",cart);
				}
				session.setAttribute("products",list);
				forward=mapping.findForward("manager_list");
			}
		}catch(Exception e){
			e.printStackTrace();
			forward=mapping.findForward("error");
		}
		return forward;
	}
	public ActionForward deleteSelectedProduct(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		ActionForward forward = null;
		try {
			HttpSession session = request.getSession(false);
			Integer id=Integer.valueOf(request.getParameter("productid"));
			service.deleteProductById(id);
			forward = mapping.findForward("listProduct");
		} catch (Exception e) {
			e.printStackTrace();
			forward = mapping.findForward("error");
		}
		return forward;
	}
	public ActionForward toModifyProduct(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		ActionForward forward = null;
		try {
			HttpSession session = request.getSession(false);
			Integer id=Integer.valueOf(request.getParameter("productid"));
			Product product = service.findProductById(id);
			session.setAttribute("selectedProduct", product);
			forward = mapping.findForward("toModifyProduct");
		} catch (Exception e) {
			e.printStackTrace();
			forward = mapping.findForward("error");
		}
		return forward;
	}
	public ActionForward modifyProduct(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		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();
			product.setName(name);
			product.setPrice(price);
			product.setDescription(description);
			product.setId(id);
			service.updateProduct(product);
			forward = mapping.findForward("manager_list");
		} catch (Exception e) {
			e.printStackTrace();
			forward = mapping.findForward("error");
		}
		return forward;
	}
	
	public ActionForward addProduct(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		ActionForward forward = null;
		try {
			HttpSession session = request.getSession(false);
			String name = request.getParameter("name");
			String description = request.getParameter("description");
			double price=Double.parseDouble(request.getParameter("price"));
			Product product = new Product();
			product.setName(name);
			product.setPrice(price);
			product.setDescription(description);
			service.saveProduct(product);
			forward = mapping.findForward("manager_list");
		} catch (Exception e) {
			e.printStackTrace();
			forward = mapping.findForward("error");
		}
		return forward;
	}
	
}