使用Jave EE提供的登录表单身份验证在JSP页面中获取会话变量

Question

I'm following this guide Securing web application in order to create login form authentication in my web app. Unfortunately something don't satisfy me. I'm looking for a variable that I could use in a jsp page that say the user is logged on or not. for istance

<c:if test=${userIsLogged}>

</c:if

Does exist a way to get a variable linked to the session?

Answer 1

Test this:

<c:if test=${not empty pageContext.request.userPrincipal}>

    User login:  ${pageContext.request.userPrincipal.name}

</c:if

NOTE: This only works if you use Container login (JAAS).