📄 update.jsp
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<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*"%>
<%@ page import="cart.*"%>
<%@ page import="java.util.Vector"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>修改购物车</title>
</head>
<body>
<%
Vector shop=(Vector)session.getAttribute("shop");
Vector newshop=new Vector();
for(int i=0;i<shop.size();i++){
String number=request.getParameter("num"+i);
if(number.equals("")){
out.println("<script language='javascript'>alert('数量不能为空');history.back();</script>");
}
CartItem mylist=(CartItem)shop.elementAt(i);
String num=request.getParameter("num"+i);
int newnum=Integer.parseInt(num);
mylist.setCount(newnum);
if(newnum!=0)
{newshop.addElement(mylist);}
}
session.setAttribute("shop",newshop);
%>
<script language="javascript">
alert("修改成功");
window.location.href="order.jsp";
</script>
</body>
</html>
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