Java tutorial
import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class SessionTimer extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { res.setContentType("text/html"); PrintWriter out = res.getWriter(); HttpSession session = req.getSession(); out.println("<HTML><HEAD><TITLE>SessionTimer</TITLE></HEAD>"); out.println("<BODY><H1>Session Timer</H1>"); out.println("The previous timeout was " + session.getMaxInactiveInterval()); out.println("<BR>"); session.setMaxInactiveInterval(2 * 60 * 60); // two hours out.println("The newly assigned timeout is " + session.getMaxInactiveInterval()); out.println("</BODY></HTML>"); } }