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Java Servlets - 2 minute tutorial

How to get session of http client from HttpServletRequest

If you need to use sessions, you can create a session or get an existing session using the method HttpSession getSession() of the HttpServletRequest object.

If you need to get a session if it already exists and not create one , then use the method HttpSesison getSession(boolean) with argument as false as shown in the example below.

protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
	HttpSession session = req.getSession();
	HttpSession existingSession = req.getSession(false);