upbuy.jsp

用JSP写的一个在线购物网站的代码

<%@ page contentType="text/html;charset=gb2312" import="java.util.*,shop.buy.buy" %>
<%
Vector buy=(Vector)session.getValue("ware");
Vector newbuy=new Vector();
int id=Integer.parseInt(request.getParameter("id"));
buy list=(buy)buy.elementAt(id);
int newnum=Integer.parseInt(request.getParameter("num"+id));
if(newnum==0)
{%>
<script language="JavaScript">
alert("数量不能为０，如果您想删除该商品请点选删除按钮");
window.close();
</script>
<%}else{
list.number=newnum;
buy.setElementAt(list,id);
response.sendRedirect("warelist.jsp");
}
%>