Difference between request getSession and request getSession true

Question

I understand the difference between request getSession true  and request getSession false   But request getSession    amp  request getSession true  look very similar   Both  return the current session associated with this request   but differ in   request getSession         or if the request does not have a session  creates one    request getSession true        if there is no current session  returns a new session    I don t understand the difference between them  is it that  if none exists  they create a new session but the first one doesn t return it but the second one does   Source  http   docs oracle com javaee 6 api javax servlet http HttpServletRequest html  Edit   Someone tagged marked my question as duplicate even though it isn t  I will explain why   I have explicitly asked for the difference between request getSession    amp  request getSession true  and NOT between request getSession true   amp  request getSession false   I have stated   again explicitly  that I already understand the difference b w    true   amp     false    The question linked as a possible duplicated of of asks about the difference b w    true   amp     false  and not    true   amp

User · Answer

request getSession true  and request getSession   both do the same thing  but if we use  request getSession false  it will return null if session object not created yet

User · Answer

request getSession   or request getSession true   both will return a current session only   if current session will not exist then it will create a new session

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

They both return the same thing  as noted in the documentation you linked  an  HttpSession object   You can also look at a concrete implementation  e g  Tomcat  and see what it s actually doing  Request java class  In this case  basically they both call    Session session   doGetSession true

User · Answer

A major practical difference is its use   in security scenario where we always needed a new session  we should use request getSession true    request getSession false   will return null if no session found

[java] Difference between request.getSession() and request.getSession(true)

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