Java tutorial
import java.util.*; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class MyServlet extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { res.setContentType("text/html"); PrintWriter out = res.getWriter(); HttpSession session = req.getSession(); Integer count = (Integer) session.getAttribute("snoop.count"); if (count == null) count = new Integer(1); else count = new Integer(count.intValue() + 1); session.setAttribute("snoop.count", count); out.println("<HTML><HEAD><TITLE>SessionSnoop</TITLE></HEAD>"); out.println("<BODY><H1>Session Snoop</H1>"); out.println("You've visited this page " + count + ((count.intValue() == 1) ? " time." : " times.")); out.println("<P>"); out.println("<H3>Here is your saved session data:</H3>"); Enumeration e = session.getAttributeNames(); while (e.hasMoreElements()) { String name = (String) e.nextElement(); out.println(name + ": " + session.getAttribute(name) + "<BR>"); } out.println("<H3>Here are some vital stats on your session:</H3>"); out.println("Session id: " + session.getId() + " <I>(keep it secret)</I><BR>"); out.println("New session: " + session.isNew() + "<BR>"); out.println("Timeout: " + session.getMaxInactiveInterval()); out.println("<I>(" + session.getMaxInactiveInterval() / 60 + " minutes)</I><BR>"); out.println("Creation time: " + session.getCreationTime()); out.println("<I>(" + new Date(session.getCreationTime()) + ")</I><BR>"); out.println("Last access time: " + session.getLastAccessedTime()); out.println("<I>(" + new Date(session.getLastAccessedTime()) + ")</I><BR>"); out.println("Requested session ID from cookie: " + req.isRequestedSessionIdFromCookie() + "<BR>"); out.println("Requested session ID from URL: " + req.isRequestedSessionIdFromURL() + "<BR>"); out.println("Requested session ID valid: " + req.isRequestedSessionIdValid() + "<BR>"); out.println("<H3>Test URL Rewriting</H3>"); out.println("Click <A HREF=\"" + res.encodeURL(req.getRequestURI()) + "\">here</A>"); out.println("to test that session tracking works via URL"); out.println("rewriting even when cookies aren't supported."); out.println("</BODY></HTML>"); } }