This week's book giveaway is in the Mac OS forum.
We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line!
See this thread for details.
The moose likes Servlets and the fly likes ServletContext, PageContext HttpSesstion and HttpServletRequest Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


JavaRanch » Java Forums » Java » Servlets
Bookmark "ServletContext, PageContext HttpSesstion and HttpServletRequest" Watch "ServletContext, PageContext HttpSesstion and HttpServletRequest" New topic
Author

ServletContext, PageContext HttpSesstion and HttpServletRequest

Richard Teston
Ranch Hand

Joined: Feb 12, 2002
Posts: 89
Hi,
What are the difference in storing values within ServletContext, PageContext, HttpSession and HttpServletRequest? What is/are the significance of each scope in web application developing?


The Code is the Programmer
William Brogden
Author and all-around good cowpoke
Rancher

Joined: Mar 22, 2000
Posts: 12792
    
    5
ServletContext = all users in entire web application can use
HttpSession = only one user (typically identified by cookie) can use. An application may manage many sessions.
HttpServletRequest = data that only exists during one request for one user
PageContext = a concept that is only used in JSP for variables that don't get passed if the request is forwarded
Bill
 
GeeCON Prague 2014
 
subject: ServletContext, PageContext HttpSesstion and HttpServletRequest