public String cart(HttpServletRequest request, HttpServletResponse response, Page page) {
		User user =(User) request.getSession().getAttribute("user");
		List<OrderItem> ois = orderItemDAO.listByUser(user.getId());
		request.setAttribute("ois", ois);
		return "cart.jsp";
	}	

package tmall.servlet;

import java.io.BufferedWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

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

import org.springframework.web.util.HtmlUtils;

import tmall.bean.Category;
import tmall.bean.OrderItem;
import tmall.bean.Product;
import tmall.bean.ProductImage;
import tmall.bean.PropertyValue;
import tmall.bean.Review;
import tmall.bean.User;
import tmall.comparator.ProductAllComparator;
import tmall.comparator.ProductDateComparator;
import tmall.comparator.ProductPriceComparator;
import tmall.comparator.ProductReviewComparator;
import tmall.comparator.ProductSaleCountComparator;
import tmall.dao.CategoryDAO;
import tmall.dao.ProductDAO;
import tmall.dao.ProductImageDAO;
import tmall.util.Page;

public class ForeServlet extends BaseForeServlet {
	public String home(HttpServletRequest request, HttpServletResponse response, Page page) {
		List<Category> cs= new CategoryDAO().list();
		new ProductDAO().fill(cs);
		new ProductDAO().fillByRow(cs);
		request.setAttribute("cs", cs);
		return "home.jsp";
	}

	public String register(HttpServletRequest request, HttpServletResponse response, Page page) {
		String name = request.getParameter("name");
		String password = request.getParameter("password");
		name = HtmlUtils.htmlEscape(name);
		System.out.println(name);
		boolean exist = userDAO.isExist(name);
		
		if(exist){
			request.setAttribute("msg", "用户名已经被使用,不能使用");
			return "register.jsp";	
		}
		
		User user = new User();
		user.setName(name);
		user.setPassword(password);
		System.out.println(user.getName());
		System.out.println(user.getPassword());
		userDAO.add(user);
		
		return "@registerSuccess.jsp";	
	}	
	public String login(HttpServletRequest request, HttpServletResponse response, Page page) {
		String name = request.getParameter("name");
		name = HtmlUtils.htmlEscape(name);
		String password = request.getParameter("password");		
		
		User user = userDAO.get(name,password);
		 
		if(null==user){
			request.setAttribute("msg", "账号密码错误");
			return "login.jsp";	
		}
		request.getSession().setAttribute("user", user);
		return "@forehome";	
	}	
	
	public String product(HttpServletRequest request, HttpServletResponse response, Page page) {
		int pid = Integer.parseInt(request.getParameter("pid"));
		Product p = productDAO.get(pid);
		
		List<ProductImage> productSingleImages = productImageDAO.list(p, ProductImageDAO.type_single);
		List<ProductImage> productDetailImages = productImageDAO.list(p, ProductImageDAO.type_detail);
		p.setProductSingleImages(productSingleImages);
		p.setProductDetailImages(productDetailImages);
		
		List<PropertyValue> pvs = propertyValueDAO.list(p.getId());		
	
		List<Review> reviews = reviewDAO.list(p.getId());
		
		productDAO.setSaleAndReviewNumber(p);

		request.setAttribute("reviews", reviews);

		request.setAttribute("p", p);
		request.setAttribute("pvs", pvs);
		return "product.jsp";		
	}
	public String logout(HttpServletRequest request, HttpServletResponse response, Page page) {
		request.getSession().removeAttribute("user");
		return "@forehome";	
	}

	public String checkLogin(HttpServletRequest request, HttpServletResponse response, Page page) {
		User user =(User) request.getSession().getAttribute("user");
		if(null!=user)
			return "%success";
		return "%fail";
	}
	public String loginAjax(HttpServletRequest request, HttpServletResponse response, Page page) {
		String name = request.getParameter("name");
		String password = request.getParameter("password");		
		User user = userDAO.get(name,password);
		
		if(null==user){
			return "%fail";	
		}
		request.getSession().setAttribute("user", user);
		return "%success";	
	}
	public String category(HttpServletRequest request, HttpServletResponse response, Page page) {
		int cid = Integer.parseInt(request.getParameter("cid"));
		
		Category c = new CategoryDAO().get(cid);
		new ProductDAO().fill(c);
		new ProductDAO().setSaleAndReviewNumber(c.getProducts());		
		
		String sort = request.getParameter("sort");
		if(null!=sort){
		switch(sort){
			case "review":
				Collections.sort(c.getProducts(),new ProductReviewComparator());
				break;
			case "date" :
				Collections.sort(c.getProducts(),new ProductDateComparator());
				break;
				
			case "saleCount" :
				Collections.sort(c.getProducts(),new ProductSaleCountComparator());
				break;
				
			case "price":
				Collections.sort(c.getProducts(),new ProductPriceComparator());
				break;
				
			case "all":
				Collections.sort(c.getProducts(),new ProductAllComparator());
				break;
			}
		}
		
		request.setAttribute("c", c);
		return "category.jsp";		
	}
	
	public String search(HttpServletRequest request, HttpServletResponse response, Page page){
		String keyword = request.getParameter("keyword");
		List<Product> ps= new ProductDAO().search(keyword,0,20);
		productDAO.setSaleAndReviewNumber(ps);
		request.setAttribute("ps",ps);
		return "searchResult.jsp";
	}

	public String buyone(HttpServletRequest request, HttpServletResponse response, Page page) {
		int pid = Integer.parseInt(request.getParameter("pid"));
		int num = Integer.parseInt(request.getParameter("num"));
		Product p = productDAO.get(pid);
		int oiid = 0;
		
		User user =(User) request.getSession().getAttribute("user");
		boolean found = false;
		List<OrderItem> ois = orderItemDAO.listByUser(user.getId());
		for (OrderItem oi : ois) {
			if(oi.getProduct().getId()==p.getId()){
				oi.setNumber(oi.getNumber()+num);
				orderItemDAO.update(oi);
				found = true;
				oiid = oi.getId();
				break;
			}
		}		

		if(!found){
			OrderItem oi = new OrderItem();
			oi.setUser(user);
			oi.setNumber(num);
			oi.setProduct(p);
			orderItemDAO.add(oi);
			oiid = oi.getId();
		}
		return "@forebuy?oiid="+oiid;
	}

	public String buy(HttpServletRequest request, HttpServletResponse response, Page page){
		String[] oiids=request.getParameterValues("oiid");
		List<OrderItem> ois = new ArrayList<>();
		float total = 0;

		for (String strid : oiids) {
			int oiid = Integer.parseInt(strid);
			OrderItem oi= orderItemDAO.get(oiid);
			total +=oi.getProduct().getPromotePrice()*oi.getNumber();
			ois.add(oi);
		}
		
		request.getSession().setAttribute("ois", ois);
		request.setAttribute("total", total);
		return "buy.jsp";
	}	
	public String addCart(HttpServletRequest request, HttpServletResponse response, Page page) {
		int pid = Integer.parseInt(request.getParameter("pid"));
		Product p = productDAO.get(pid);
		int num = Integer.parseInt(request.getParameter("num"));
		
		User user =(User) request.getSession().getAttribute("user");
		boolean found = false;

		List<OrderItem> ois = orderItemDAO.listByUser(user.getId());
		for (OrderItem oi : ois) {
			if(oi.getProduct().getId()==p.getId()){
				oi.setNumber(oi.getNumber()+num);
				orderItemDAO.update(oi);
				found = true;
				break;
			}
		}		
		
		if(!found){
			OrderItem oi = new OrderItem();
			oi.setUser(user);
			oi.setNumber(num);
			oi.setProduct(p);
			orderItemDAO.add(oi);
		}
		return "%success";
	}
	public String cart(HttpServletRequest request, HttpServletResponse response, Page page) {
		User user =(User) request.getSession().getAttribute("user");
		List<OrderItem> ois = orderItemDAO.listByUser(user.getId());
		request.setAttribute("ois", ois);
		return "cart.jsp";
	}	
}

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8" isELIgnored="false"%>

<%@include file="include/header.jsp"%>
<%@include file="include/top.jsp"%>
<%@include file="include/simpleSearch.jsp"%>

<%@include file="include/cart/cartPage.jsp"%>
<%@include file="include/footer.jsp"%>

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8" isELIgnored="false"%>
	
<script>
var deleteOrderItem = false;
var deleteOrderItemid = 0;
$(function(){

	$("a.deleteOrderItem").click(function(){
		deleteOrderItem = false;
		var oiid = $(this).attr("oiid")
		deleteOrderItemid = oiid;
		$("#deleteConfirmModal").modal('show');	   
	});
	$("button.deleteConfirmButton").click(function(){
		deleteOrderItem = true;
		$("#deleteConfirmModal").modal('hide');
	});
	
	$('#deleteConfirmModal').on('hidden.bs.modal', function (e) {
		if(deleteOrderItem){
			var page="foredeleteOrderItem";
			$.post(
				    page,
				    {"oiid":deleteOrderItemid},
				    function(result){
						if("success"==result){
							$("tr.cartProductItemTR[oiid="+deleteOrderItemid+"]").hide();
						}
						else{
							location.href="login.jsp";
						}
				    }
				);
			
		}
	})	
	
	$("img.cartProductItemIfSelected").click(function(){
		var selectit = $(this).attr("selectit")
		if("selectit"==selectit){
			$(this).attr("src","img/site/cartNotSelected.png");
			$(this).attr("selectit","false")
			$(this).parents("tr.cartProductItemTR").css("background-color","#fff");
		}
		else{
			$(this).attr("src","img/site/cartSelected.png");
			$(this).attr("selectit","selectit")
			$(this).parents("tr.cartProductItemTR").css("background-color","#FFF8E1");
		}
		syncSelect();
		syncCreateOrderButton();
		calcCartSumPriceAndNumber();
	});
	$("img.selectAllItem").click(function(){
		var selectit = $(this).attr("selectit")
		if("selectit"==selectit){
			$("img.selectAllItem").attr("src","img/site/cartNotSelected.png");
			$("img.selectAllItem").attr("selectit","false")
			$(".cartProductItemIfSelected").each(function(){
				$(this).attr("src","img/site/cartNotSelected.png");
				$(this).attr("selectit","false");
				$(this).parents("tr.cartProductItemTR").css("background-color","#fff");
			});			
		}
		else{
			$("img.selectAllItem").attr("src","img/site/cartSelected.png");
			$("img.selectAllItem").attr("selectit","selectit")
			$(".cartProductItemIfSelected").each(function(){
				$(this).attr("src","img/site/cartSelected.png");
				$(this).attr("selectit","selectit");
				$(this).parents("tr.cartProductItemTR").css("background-color","#FFF8E1");
			});				
		}
		syncCreateOrderButton();
		calcCartSumPriceAndNumber();
		
	});
	
	$(".orderItemNumberSetting").keyup(function(){
		var pid=$(this).attr("pid");
		var stock= $("span.orderItemStock[pid="+pid+"]").text();
		var price= $("span.orderItemPromotePrice[pid="+pid+"]").text();
		
		var num= $(".orderItemNumberSetting[pid="+pid+"]").val();
		num = parseInt(num);
		if(isNaN(num))
			num= 1;
		if(num<=0)
			num = 1;
		if(num>stock)
			num = stock;
		
		syncPrice(pid,num,price);
	});

	$(".numberPlus").click(function(){
		
		var pid=$(this).attr("pid");
		var stock= $("span.orderItemStock[pid="+pid+"]").text();
		var price= $("span.orderItemPromotePrice[pid="+pid+"]").text();
		var num= $(".orderItemNumberSetting[pid="+pid+"]").val();

		num++;
		if(num>stock)
			num = stock;
		syncPrice(pid,num,price);
	});
	$(".numberMinus").click(function(){
		var pid=$(this).attr("pid");
		var stock= $("span.orderItemStock[pid="+pid+"]").text();
		var price= $("span.orderItemPromotePrice[pid="+pid+"]").text();
		
		var num= $(".orderItemNumberSetting[pid="+pid+"]").val();
		--num;
		if(num<=0)
			num=1;
		syncPrice(pid,num,price);
	});	
	
	$("button.createOrderButton").click(function(){
		var params = "";
		$(".cartProductItemIfSelected").each(function(){
			if("selectit"==$(this).attr("selectit")){
				var oiid = $(this).attr("oiid");
				params += "&oiid="+oiid;
			}
		});
		params = params.substring(1);
		location.href="forebuy?"+params;
	});
	
})

function syncCreateOrderButton(){
	var selectAny = false;
	$(".cartProductItemIfSelected").each(function(){
		if("selectit"==$(this).attr("selectit")){
			selectAny = true;
		}
	});
	
	if(selectAny){
		$("button.createOrderButton").css("background-color","#C40000");
		$("button.createOrderButton").removeAttr("disabled");
	}
	else{
		$("button.createOrderButton").css("background-color","#AAAAAA");
		$("button.createOrderButton").attr("disabled","disabled");		
	}
		
}
function syncSelect(){
	var selectAll = true;
	$(".cartProductItemIfSelected").each(function(){
		if("false"==$(this).attr("selectit")){
			selectAll = false;
		}
	});
	
	if(selectAll)
		$("img.selectAllItem").attr("src","img/site/cartSelected.png");
	else
		$("img.selectAllItem").attr("src","img/site/cartNotSelected.png");
	
}
function calcCartSumPriceAndNumber(){
	var sum = 0;
	var totalNumber = 0;
	$("img.cartProductItemIfSelected[selectit='selectit']").each(function(){
		var oiid = $(this).attr("oiid");
		var price =$(".cartProductItemSmallSumPrice[oiid="+oiid+"]").text();
		price = price.replace(/,/g, "");
		price = price.replace(/￥/g, "");
		sum += new Number(price);	
		
		var num =$(".orderItemNumberSetting[oiid="+oiid+"]").val();
		totalNumber += new Number(num);	
		
	});
	
	$("span.cartSumPrice").html("￥"+formatMoney(sum));
	$("span.cartTitlePrice").html("￥"+formatMoney(sum));
	$("span.cartSumNumber").html(totalNumber);
}
function syncPrice(pid,num,price){
	$(".orderItemNumberSetting[pid="+pid+"]").val(num);
	var cartProductItemSmallSumPrice = formatMoney(num*price); 
	$(".cartProductItemSmallSumPrice[pid="+pid+"]").html("￥"+cartProductItemSmallSumPrice);
	calcCartSumPriceAndNumber();
	
	var page = "forechangeOrderItem";
	$.post(
		    page,
		    {"pid":pid,"number":num},
		    function(result){
				if("success"!=result){
					location.href="login.jsp";
				}
		    }
		);

}
</script>	

<title>购物车</title>
<div class="cartDiv">
	<div class="cartTitle pull-right">
		<span>已选商品  (不含运费)</span>
		<span class="cartTitlePrice">￥0.00</span>
		<button class="createOrderButton" disabled="disabled">结 算</button>
	</div>
	
	<div class="cartProductList">
		<table class="cartProductTable">
			<thead>
				<tr>
					<th class="selectAndImage">
							<img selectit="false" class="selectAllItem" src="img/site/cartNotSelected.png">				
					全选
					
					</th>
					<th>商品信息</th>
					<th>单价</th>
					<th>数量</th>
					<th width="120px">金额</th>
					<th class="operation">操作</th>
				</tr>
			</thead>
			<tbody>
				<c:forEach items="${ois }" var="oi">
					<tr oiid="${oi.id}" class="cartProductItemTR">
						<td>
							<img selectit="false" oiid="${oi.id}" class="cartProductItemIfSelected" src="img/site/cartNotSelected.png">
							<a style="display:none" href="#nowhere"><img src="img/site/cartSelected.png"></a>
							<img class="cartProductImg"  src="img/productSingle_middle/${oi.product.firstProductImage.id}.jpg">
						</td>
						<td>
							<div class="cartProductLinkOutDiv">
								<a href="foreproduct?pid=${oi.product.id}" class="cartProductLink">${oi.product.name}</a>
								<div class="cartProductLinkInnerDiv">
									<img src="img/site/creditcard.png" title="支持信用卡支付">
									<img src="img/site/7day.png" title="消费者保障服务,承诺7天退货">
									<img src="img/site/promise.png" title="消费者保障服务,承诺如实描述">
								</div>
							</div>
							
						</td>
						<td>
							<span class="cartProductItemOringalPrice">￥${oi.product.orignalPrice}</span>
							<span  class="cartProductItemPromotionPrice">￥${oi.product.promotePrice}</span>
							
						</td>
						<td>
						
							<div class="cartProductChangeNumberDiv">
								<span class="hidden orderItemStock " pid="${oi.product.id}">${oi.product.stock}</span>
								<span class="hidden orderItemPromotePrice " pid="${oi.product.id}">${oi.product.promotePrice}</span>
								<a  pid="${oi.product.id}" class="numberMinus" href="#nowhere">-</a>
								<input pid="${oi.product.id}" oiid="${oi.id}" class="orderItemNumberSetting" autocomplete="off" value="${oi.number}">
								<a  stock="${oi.product.stock}" pid="${oi.product.id}" class="numberPlus" href="#nowhere">+</a>
							</div>					
						
						 </td>
						<td >
							<span class="cartProductItemSmallSumPrice" oiid="${oi.id}" pid="${oi.product.id}" >
							￥<fmt:formatNumber type="number" value="${oi.product.promotePrice*oi.number}" minFractionDigits="2"/>
							</span>
						
						</td>
						<td>
							<a class="deleteOrderItem" oiid="${oi.id}"  href="#nowhere">删除</a>
						</td>
					</tr>
				</c:forEach>				
			</tbody>
		
		</table>
	</div>
	
	<div class="cartFoot">
		<img selectit="false" class="selectAllItem" src="img/site/cartNotSelected.png">
		<span>全选</span>
<!-- 		<a href="#">删除</a> -->
		
		<div class="pull-right">
			<span>已选商品 <span class="cartSumNumber" >0</span> 件</span>
			
			<span>合计 (不含运费): </span> 
			<span class="cartSumPrice" >￥0.00</span>
			<button class="createOrderButton" disabled="disabled" >结  算</button>
		</div>
		
	</div>
	
</div>