- 用户到便民超市采购商品，购物前需要先登录会员卡号，购物时先将选购的商品放入购物车，最后到柜台清点商品。请借助于session对象模拟购物车，并存储客户的会员卡号和购买的商品名称。会员卡号输入后可以修改，购物车中的商品可以查看。编写程序模拟上述过程。loginID.jsp实现会员卡号输入，shop.jsp实现商品导购，food.jsp实现商品购物，count.jsp实现清点商品。本节实践环节先运行loginID.jsp页面，运行效果如图所示
(1) loginID.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="shop.jsp" method="post">
欢迎您来到便民超市，请输入您的会员卡号：<br>
<input type="text" name="id">
<input type="submit" value="提交">
</form>
</body>
</html>
(2) shop.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="food.jsp">这里是调料柜台，欢迎选购您喜欢的调料。</a><br/>
<a href="loginID.jsp">欢迎修改会员卡号！</a>
<%
String id = request.getParameter("id");
session.setAttribute("id",id);
%>
</body>
</html>
(3) food.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
这里是调料柜台，请选择您要购买的调料：<br/>
<form action="count.jsp" method="post">
<!-- 调料表单设计 -->
这里是调料柜台，请选择您要购买的调料：<br>
<input type="checkbox" name="tiaoliao" value="调和油"/>调和油
<input type="checkbox" name="tiaoliao" value="强化盐"/>强化盐
<input type="checkbox" name="tiaoliao" value="多维醋"/>多维醋
<input type="checkbox" name="tiaoliao" value="绿色调料"/>绿色调料<br>
<input type="submit" value="购物"/>
</form>
<br><br>
<a href="loginID.jsp">欢迎修改会员卡号!</a>
<a href="count.jsp">欢迎查看购物车!</a>
</body>
</html>
(4) count.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
这里是结帐柜台，请确认一下信息：<br><br>
您的会员卡号是： <%--从session中获取会员卡号--%>
<%
String crd=(String)session.getAttribute("id");
out.print(crd);
%><br>
购物车中的商品清单：<br>
<%
request.setCharacterEncoding("UTF-8");
String get_goods[]=request.getParameterValues("tiaoliao");
if(get_goods!=null){
session.setAttribute("goods",get_goods);
}
String goods[]=(String[])session.getAttribute("goods");
if(goods!=null){
for(int i=0;i<goods.length;i++){
out.print(goods[i]+"<br>");
}
}
%>