<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
if(request.getSession().getAttribute("user")==null){
response.sendRedirect("main.jsp");
}
%>
后台
您的权限不够！