세션 타임아웃 관련 처리

// Get reference on session object

HttpSession session = req.getSession();

// Display session timeout value defined in "web.xml"

// Value here is specified in seconds...

System.out.printf("Session timeout defined at application level : %s\n", session.getMaxInactiveInterval());

// Change session timeout for this session and display new timeout value

// Value here is defined in seconds...

session.setMaxInactiveInterval(60);

System.out.printf("Session timeout defined at code level : %s\n",  session.getMaxInactiveInterval());