VisitCounterServletpublic class VisitCounterServlet extends HttpServlet | In general, you may use the code in this book in your programs and
documentation. You do not need to contact us for permission unless
you're reproducing a significant portion of the code. For example,
writing a program that uses several chunks of code from this book does
not require permission. Selling or distributing a CD-ROM of examples
from O'Reilly books does require permission. Answering a question by
citing this book and quoting example code does not require permission.
Incorporating a significant amount of example code from this book into
your product's documentation does require permission.
We appreciate, but do not require, attribution. An attribution usually
includes the title, author, publisher, and ISBN. For example:
"Java Enterprise in a Nutshell, Third Edition,
by Jim Farley and William Crawford
with Prakash Malani, John G. Norman, and Justin Gehtland.
Copyright 2006 O'Reilly Media, Inc., 0-596-10142-2."
If you feel your use of code examples falls outside fair use or the
permission given above, feel free to contact us at
permissions@oreilly.com. |
| Methods Summary |
|---|
| public void | doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
PrintWriter out = resp.getWriter( );
resp.setContentType("text/html");
HttpSession thisUser = req.getSession(true);
Integer visits;
if(!thisUser.isNew( )) { //Don't check newly created sessions
visits = (Integer)thisUser.getAttribute("visitcounter.visits");
if(visits == null)
visits = new Integer(1);
else
visits = new Integer(visits.intValue( ) + 1);
}
else
visits = new Integer(1);
// Put the new count in the session
thisUser.setAttribute("visitcounter.visits", visits);
// Finally, display the results and give them the session ID too
out.println("<html><head><title>Visit Counter</title></head>");
out.println("<body>You have visited this page " + visits + " time[s]");
out.println("since your last session expired.");
out.println("Your Session ID is " + thisUser.getId( ));
out.println("</body></html>");
|
|
