//必须删除掉页面上的默认内容，不然支付宝会多次回调 <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div> </div>
</form>
</body>
</html>