In this example we are going to find out whether the session is pre-existing or not.
Pre- Existing Session
In this example we are going to find out whether the
session is pre-existing or not.
Consider a situation where servlet want to use only a
existing session. It is not always a good idea to create a new session. To
perform this work we have one overloaded method getSession(boolean) of
the request object. If we don't want to create a new session then we should use getSession(false).
In the example below we have used the method getSession(false)
which will test whether the session is null or not. If there will be no session
then the new session will be created by the method getSession().