Which EL expression returns true if no session has been established with current client?

The correct answer is A. ${not(pageContext.session)}. A session is never null. The session is always present in JSP EL, unless you add <%@page session="false" %> If you'd like to check if the session is new or has already been created, use HttpSession#isNew() instead. <c:if test="${not pageContext.session['new']}"> You've…

Question

Which EL expression returns true if no session has been established with current client?

Options

A${not(pageContext.session)}
B${not(requestScope.session)}
C${requestScope.sessions.this}
D${sessionScope.empty}

How the community answered

(38 responses)

A
82% (31)
B
11% (4)
C
5% (2)
D
3% (1)

Explanation

A session is never null. The session is always present in JSP EL, unless you add <%@page session="false" %> * If you'd like to check if the session is new or has already been created, use HttpSession#isNew() instead. <c:if test="${not pageContext.session['new']}"> You've already visited this site before. <c:if test="${pageContext.session['new']}"> You've just started the session with this request! </c:if>

Topics

#EL expressions#pageContext#session check#empty operator

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