Difference between request.getSession() and request.getSession(true)

request.getSession() will return a current session. if current session does not exist, then it will create a new one.

request.getSession(true) will return current session. If current session does not exist, then it will create a new session.

So basically there is not difference between both method.

request.getSession(false) will return current session if current session exists. If not, it will not create a new session.

request.getSession() is just a convenience method. It does exactly the same as request.getSession(true).

Method with boolean argument :

  request.getSession(true);

returns new session, if the session is not associated with the request

  request.getSession(false);

returns null, if the session is not associated with the request.

Method without boolean argument :

  request.getSession();

returns new session, if the session is not associated with the request and returns the existing session, if the session is associated with the request.It won't return null.