How to check if session exists or not? in Java

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asked Sep 26, 2013 in JAVA by kalpana (3,995 points)
Hi all

   How to check if session exists or not? in Java

please give some idea....

1 Answer

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answered Sep 26, 2013 by john (4,220 points)

If you want to check this before creating, then do so:

HttpSession session = request.getSession(false);
if (session == null) {
    // Not created yet. Now do so yourself.
    session = request.getSession();
} else {
    // Already created.
}

If you don't care about checking this after creating, then you can also do so:

HttpSession session = request.getSession();
if (session.isNew()) {
    // Freshly created.
} else {
    // Already created.
}

That saves a line and a boolean. The request.getSession() does the same as request.getSession(true).

 

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