java - State of HttpSession instance after timeout? -


what makes httpsession instance expire after time-out when checked 

 if(session!=null){          system.out.println("the instance not null");         }else{         system.out.println("the instance null");         }

each time if-block executed.

  • for expiring session, use session.invalidate(). ensure session expired.
  • even if session invalidated, doesn't mean null

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