1 delProductFromCart 删除单一商品
//6 删除单一商品 public void delProductFromCart(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获得要删除的item的pid String pid = request.getParameter("pid"); //删除session中的购物车中的购物项集合中的item HttpSession session = request.getSession(); Cart cart = (Cart) session.getAttribute("cart"); if(cart!=null){ Map<String, CartItem> cartItems = cart.getCartItems(); //修改总价 cart.setTotal(cart.getTotal()-cartItems.get(pid).getSubtotal()); cartItems.remove(pid); cart.setCartItems(cartItems); } session.setAttribute("cart", cart); //跳转回购物车 response.sendRedirect(request.getContextPath()+"/cart.jsp"); }
2 cart.jsp代码
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>黑马商城购物车</title> <link rel="stylesheet" href="css/bootstrap.min.css" type="text/css" /> <script src="js/jquery-1.11.3.min.js" type="text/javascript"></script> <script src="js/bootstrap.min.js" type="text/javascript"></script> <!-- 引入自定义css文件 style.css --> <link rel="stylesheet" href="css/style.css" type="text/css" /> <style> body { margin-top: 20px; margin: 0 auto; } .carousel-inner .item img { width: 100%; height: 300px; } font { color: #3164af; font-size: 18px; font-weight: normal; padding: 0 10px; } </style> <script type="text/javascript"> function delProductFromCart(pid) { if(confirm("你是否要删除该项")){ location.href="${pageContext.request.contextPath}/product?method=delProductFromCart&pid="+pid; } } </script> </head> <body> <!-- 引入header.jsp --> <jsp:include page="/header.jsp"></jsp:include> <!-- 判断购物车中是否还有商品，有商品显示商品，没有商品显示小兔子 --> <c:if test="${!empty cart.cartItems }"> <div class="container"> <div class="row"> <div style="margin: 0 auto; margin-top: 10px; 950px;"> <strong style="font-size: 16px; margin: 5px 0;">订单详情</strong> <table class="table table-bordered"> <tbody> <tr class="warning"> <th>图片</th> <th>商品</th> <th>价格</th> <th>数量</th> <th>小计</th> <th>操作</th> </tr> <c:forEach items="${cart.cartItems }" var="entry"> <tr class="active"> <td width="60" width="40%"><input type="hidden" name="id" value="22"> <img src="${pageContext.request.contextPath }/${entry.value.product.pimage}" width="70" height="60"></td> <!--${cart.cartItems }获得是Map<String,CartItem> entry.value获得是CartItem entry.value.product获得product --> <td width="30%"><a target="_blank"> ${entry.value.product.pname}</a></td> <td width="20%">￥${entry.value.product.shop_price}</td> <td width="10%"> ${entry.value.buyNum } </td> <td width="15%"><span class="subtotal">￥${entry.value.subtotal }</span></td> <!-- '${entry.value.product.pid}'必须要加单引号 不加单引号认为是一个变量 加了才会认为是一个字符串 --> <td><a href="javascript:void(0);" class="delete" onclick="delProductFromCart('${entry.value.product.pid}')">删除</a></td> </tr> </c:forEach> </tbody> </table> </div> </div> <div style="margin-right: 130px;"> <div style="text-align: right;"> <em style="color: #ff6600;"> 登录后确认是否享有优惠 </em> 赠送积分: <em style="color: #ff6600;">${cart.total }</em> 商品金额: <strong style="color: #ff6600;">￥${cart.total }元</strong> </div> <div style="text-align: right; margin-top: 10px; margin-bottom: 10px;"> <a href="order_info.htm" id="clear" class="clear">清空购物车</a> <a href="order_info.htm"> <input type="submit" width="100" value="提交订单" name="submit" border="0" style="background: url('./images/register.gif') no-repeat scroll 0 0 rgba(0, 0, 0, 0); height: 35px; 100px; color: white;"> </a> </div> </div> </div> </c:if> <c:if test="${empty cart.cartItems }"> <div> <img alt="" src="${pageContext.request.contextPath }/images/cart-empty.png"> <a href="${pageContext.request.contextPath }" style="height: 10px; 20px;background-color: red;">返回首页</a> </div> </c:if> <!-- 引入footer.jsp --> <jsp:include page="/footer.jsp" ></jsp:include> </body> </html>