Servlet应用程序：Http会话超时

Question

Hi just want to confirm when a session is expired in a webapp based on servlet. The following session id will be available until the session is garbage collected, is that correct? httpServletRequest.getRequestedSessionId()

Thanks, C

Answer 1

When a session is expired getRequestedSessionId() return id new session which will be created when you call this method

To check if session is timed-out (in invalid state) check isRequestedSessionIdValid

Answer 2

if the session got expired, then at that point the session will be garbage collected and

httpServletRequest.getRequestedSessionId() will return new value when that method is called.

please check below url

http://download.oracle.com/docs/cd/E17802_01/products/products/servlet/2.1/api/javax.servlet.http.HttpServletRequest.html#getRequestedSessionId%28%29

Answer 3

From JavaDoc

• getRequestedSessionId

  public abstract String getRequestedSessionId()

  Gets the session id specified with this request. This may differ from the actual session id. For example, if the request specified an id for an invalid session, then this will get a new session with a new id.

  Returns: the session id specified by this request, or null if the request did not specify a session id