orderaction.java

java学习的必要的资料,servlet的说明很好

package com.estore.struts.action;

import java.sql.Date;
import java.util.Collection;
import java.util.Iterator;
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.DispatchAction;

import com.estore.struts.Globals;
import com.estore.struts.entity.Cart;
import com.estore.struts.entity.CartProduct;
import com.estore.struts.entity.Order;
import com.estore.struts.entity.OrderItem;
import com.estore.struts.entity.Product;
import com.estore.struts.entity.User;
import com.estore.struts.entity.UserItem;
import com.estore.struts.service.OrderService;
import com.estore.struts.service.ProductService;
import com.estore.struts.service.UserService;
import com.estore.struts.utils.ServiceFactory;

public class OrderAction extends DispatchAction {

	private UserService userService = (UserService) ServiceFactory
			.getInstance().getService(Globals.USER_SERVICE);

	private OrderService orderService = (OrderService) ServiceFactory
			.getInstance().getService(Globals.ORDER_SERVICE);

	/*
	 * 向服务器提交定单，生成一个用户定单保存到数据库中;
	 * 
	 * 需要:用户信息,用户的详细信息,付款方式,定单项,商品;
	 */
	public ActionForward addOrder(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		int Payinfo = Integer.parseInt(request.getParameter("payway"));
		int useritemid = Integer.parseInt(request.getParameter("useritemid"));

		HttpSession session = request.getSession();

		Cart cart = (Cart) session.getAttribute("cart");
		User user = (User) session.getAttribute("user");
		
		Order order = new Order();
		order.setCreatetime(new java.sql.Date(System.currentTimeMillis()));
		
		order.setOrderstate(0);
		order.setPayinfo(Payinfo);
		
		/*
		 * order不但和用户user有关系,也和useritem有关系,
		 * 因为某个用户也可以给别人定书;
		 */
		order.setUser(user);
		order.setUserItem(userService.getUserItemById(useritemid));

		/*
		 * 遍历session中car里面的商品,并且为每一类商品都生成一个定单项,存放在orderitem中;
		 * 定单和定单项是一对多的关系;
		 * 从Car中获得用户所选择的商品，并生成相应的订单项。
		 */
		Map<Integer, CartProduct> products = cart.getProducts();
		Set<Integer> keys = products.keySet();
		Iterator<Integer> it = keys.iterator();
		
		//记录一个定单的总和
		double sum = 0;
		while (it.hasNext()) {
			Integer key = it.next();
			CartProduct cartproduct = products.get(key);
			Product product = cartproduct.getProduct();
			System.out.println(product);
			int num = cartproduct.getNum();
			sum = sum + (num * product.getPrice());
			/*
			 * <1>. 把从cart中存放的商品取出来放到OrderItem对象中,
			 *      每一个商品product对应一个OrderItem对象;
			 * <2>. 然后把创建的OrderItem对象标示为其本身属性哪个定单的OrderItem对象;
			 * <3>. 最后将刚创建的OrderItem对象保存到指定的Order中,并且Order对象保存到数据库中；
			 * 更具从Car中取出的每个商品都生成一个对应的订单项。
			 */
			OrderItem orderItem = new OrderItem();
			orderItem.setProduct(product);
			//orderItem.setPrice(product.getPrice());
			orderItem.setQuality(num);
			
			//建立双向关系
			orderItem.setOrder(order);
			order.addOrderItem(orderItem);
		}
		
		order.setTotalprice(sum);

		orderService.saveOrder(order);
		request.setAttribute("order", order);
		
		cart=new Cart();
		session.setAttribute("cart", cart);
		return mapping.findForward("success");
	}

	/*
	 * 
	 */
	public ActionForward confirmOrder(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user");
		
		request.setAttribute("useritems", userService.getUserItem(user));
		return mapping.findForward("confirm");
	}

	/*
	 * 为用户添加一个新地址
	 */
	public ActionForward saveUserItem(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user");
		
		UserItem useritem = new UserItem();
		
		useritem.setUser(user);
		useritem.setItem_name(request.getParameter("username").trim());
		useritem.setItem_address(request.getParameter("address").trim());
		useritem.setItem_postcode(request.getParameter("postcode").trim());
		useritem.setItem_officephone(request.getParameter("officephone").trim());
		useritem.setItem_mobilephone(request.getParameter("mobilephone").trim());
		useritem.setItem_email(request.getParameter("email").trim());
		
		userService.addUserItem(useritem);
		
		request.setAttribute("useritems", userService.getUserItem(user));
		return mapping.findForward("confirm");
	}
	
	/*
	 * 删除一个收货地址
	 */
	public ActionForward deleteUserItem(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user");
		int userItemId = Integer.parseInt(request.getParameter("useritemid"));
		System.out.println("========> "+userItemId);
		
		userService.deleteUserItem(userItemId);
		
		request.setAttribute("useritems", userService.getUserItem(user));
		return mapping.findForward("confirm");
	}

	/*
	 * 把属于某个用户的所以帐单全部列出;
	 */
	public ActionForward listOrder(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user");

		Collection<Order> orders = orderService.getOrdersByUser(user);
		request.setAttribute("orders", orders);
		return mapping.findForward("orderlist");
	}

	/*
	 * 查看定单的详细信息
	 */
	public ActionForward orderInfo(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		Integer orderid = Integer.parseInt(request.getParameter("orderid"));

//      类级别的关联, 和集合级别的关联;
//		System.out.println("*****************************************");
//		for(OrderItem orderitem : orderitems){
//			System.out.println("orderitems =======> "+orderitem);
//			System.out.println("orderitems =======> "+orderitem.getProduct());
//		}
//		System.out.println("*****************************************");
		
		Order order = orderService.getOrderById(orderid);
		request.setAttribute("order", order);
		
//		只需要在request中添加order,不需要再添加orderitem项了,
//		而可以通过order---->orderItems---->product,并且后两项都采取了立即抓取;
//		Collection<OrderItem> orderitems = orderService.getOrderItems(order);
//		request.setAttribute("orderitems", orderitems);

		
		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user");	
		
//	 	user不能级联了,因为它是从session中获得的;
//		所以需要重新从数据库中取回来;
		request.setAttribute("useritems", userService.getUserItem(user));
		
		return mapping.findForward("orderinfo");
	}

	/*
	 * 根据orderid删除指定的order对象;
	 */
	public ActionForward deleteOrder(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		Integer orderid = Integer.parseInt(request.getParameter("orderid"));

		orderService.deleteOrder(orderService.getOrderById(orderid));
		return mapping.findForward("success");
	}
	
}