<%@ page import="java.util.ArrayList" %>
<%@ page import="com.demo.entity.User" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>测试人数</title>
</head>
<body>
在线人数：${number}<br>
<%
ArrayList<User> users = (ArrayList<User>) request.getServletContext().getAttribute("userList");
if (users!=null){
for (int i=0;i<users.size();i++){
User user = users.get(i);
%>
编号：<%=user.getIpString()%>,创建时间：<%=user.getFirstTime()%>IP地址：<%=user.getIpString()%><br>
<%
}
}
%>
</body>
</html>attribute 没有获取到