📄 modifynum.jsp

📁 网站的实例

💻 JSP

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<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.0 Transitional//EN">
<%@ page language="Java" contentType="text/html;charset=GB2312"%>
<jsp:useBean class="ebs.Buyercar" id="buy" scope="page"> 
</jsp:useBean>
<%
buy.setBookid(request.getParameter("bid"));
String sum=request.getParameter("sum");
int s=Integer.parseInt(sum);
if(s<=0)
 out.print("数量错误！<A href='shoppingcart.jsp'>返回</A>");
else{
	if(buy.getBooksum()<s)
	 out.print(buy.getBookname()+"库存量不足错误！请订购少于"+buy.getBooksum()+"本<A href='shoppingcart.jsp'>返回</A>");
	else{
	if(request.getParameter("bid")!=null)
	{       
                 
                 
                 Cookie cookie=new Cookie("BID"+request.getParameter("bid"),"0");                 
                 cookie.setMaxAge(0); 
                 response.addCookie(cookie);
                 Cookie cookie_new=new Cookie("BID"+request.getParameter("bid"),sum);                 
                 cookie_new.setMaxAge(30*24*60*60); //设定Cookie立即失败
                 response.addCookie(cookie_new);
                 
        }

%>
<! --jsp:forward page="shoppingcart.jsp"/-->
<html>
<head>
<meta http-equiv="refresh" content="0; URL=shoppingcart.jsp">
</head>
<body>
修改图书数量......
</body>
</html>
<%
}
}%>

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