cartaction.java

老师给的购物车

package com.tarena.shopcart.action;

import java.util.List;
import java.util.Map;
import java.util.Set;

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.shopcart.entity.Cart;
import com.tarena.shopcart.entity.OrderLine;
import com.tarena.shopcart.entity.OrderStatus;
import com.tarena.shopcart.entity.Orders;
import com.tarena.shopcart.entity.Payway;
import com.tarena.shopcart.entity.Product;
import com.tarena.shopcart.entity.Users;
import com.tarena.shopcart.service.IOrderService;
import com.tarena.shopcart.service.IProductService;
import com.tarena.shopcart.serviceImp1.OrderServiceImp1;
import com.tarena.shopcart.serviceImp1.ProductServiceImp1;


public class CartAction extends MappingDispatchAction {
	IOrderService service=new OrderServiceImp1();
	IOrderService orderservice=new OrderServiceImp1();
	
	/**
	 * 修改购物车商品数量
	 */
	public ActionForward modifyProductNum(ActionMapping mapping,
			ActionForm form, HttpServletRequest request,
			HttpServletResponse response) {
		HttpSession session = request.getSession();
		Cart cart = (Cart) session.getAttribute("cart");
		String number = request.getParameter("num");
		String productId = request.getParameter("productid");
		if (cart != null && number.length() != 0)
			cart.modifyNumberByProductId(Long.parseLong(productId), Long
					.parseLong(number));
		return mapping.findForward("toCart");
	}

	/**
	 * 删除所选商品
	 */
	public ActionForward deleteProduct(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		HttpSession session = request.getSession();
		String pid = request.getParameter("pid");
		Cart cart = (Cart) session.getAttribute("cart");
		if (cart != null) {
			cart.deleteOrderLineByProductId(Long.parseLong(pid));
		}
		return mapping.findForward("toCart");
	}

	/**
	 * 清空购物车
	 */
	public ActionForward clearCart(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		Cart cart = (Cart) request.getSession().getAttribute("cart");
		if (cart != null)
			cart.clear();
		return mapping.findForward("toCart");
	}

	/**
	 * 结帐
	 */
	public ActionForward goCheck(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		List list=service.getAllPayway();
		request.setAttribute("payways", list);
		return mapping.findForward("toCheck");
	}

	/**
	 * 生成定单,要判断用户是否登录
	 */
	public ActionForward buildOrder(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		if (request.getSession().getAttribute("cart") == null) {
			//未购买商品
			return mapping.findForward("fail");
		} else if (((Cart) (request.getSession().getAttribute("cart")))
				.isEmpty()) {
			//购物车为空
			return mapping.findForward("fail");
		} else {
//			System.out.println("正在生成订单");
			Orders order = new Orders();
			Users user = (Users)request.getSession().getAttribute("user");
			user.addOrder(order);
			String name=System.currentTimeMillis()+"";
			order.setName(name);
			String payway=request.getParameter("payway");
			int payId=Integer.parseInt(payway);
			Payway pay=orderservice.getPaywayByPyid(payId);
			order.setPayway(pay);
			OrderStatus status=orderservice.getStatusByid(1);
			order.setStatus(status);
			Map map = ((Cart) request.getSession().getAttribute("cart"))
					.getItems();
			Set<Long> set = map.keySet();
			double cost=0;
			for (Long i : set) {
				OrderLine item = (OrderLine) map.get(i);
				cost+=item.getAmount()*item.getProduct().getBaseprice();
				order.addOrderLine(item);
			}
			order.setCost(cost);
			if(service.buildOrder(order)){
				request.getSession().setAttribute("cart", null);
				return mapping.findForward("toOrder");
			}
			return mapping.findForward("fail");
			
		}
	}

	/**
	 * 添加到购物车
	 */
	public ActionForward addItemToCart(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		IProductService service = new ProductServiceImp1();
		List listProduct = service.getAllProduct();
		HttpSession session = request.getSession();
		String productId = request.getParameter("pid");
		Cart cart = null;
		Product product = null;
		cart = (Cart) session.getAttribute("cart");
		if (cart == null) {
			cart = new Cart();
		}
		for (int i = 0; i < listProduct.size(); i++) {
			product = (Product) listProduct.get(i);
			if (product != null
					&& productId.equals(String.valueOf(product.getProductId()))) {
				cart.addOrderLine(product, 1);
			}
		}
		session.setAttribute("cart", cart);
		return mapping.findForward("toList");
	}

}