check_user.jsp

基于JSP的一个科技论坛代码

<%@ page  import="java.util.*"%>
<%@page pageEncoding="UTF-8"%>
<%  
Boolean userFlag = null;
boolean userCheckFlag = false;

userFlag = (Boolean)session.getAttribute("userCheckFlag");

if(userFlag != null){
    
    userCheckFlag = userFlag.booleanValue();

}else{
        out.println("<script   language='JavaScript'>");
        out.println("alert('请先登陆')");
        out.println("window.location.href=\"index.jsp\" ");
        out.println("</script>");
    }
%>