I am using struts and JSP's I want to redirect upon timeout to the login page. I check the session in each page and if it doesn't exist, I send them . The problem with this is that the user needs to submit something. They might think they have a session until they hit submit.
and its too tedious to do this on each and every page is there some other way in struts using web.xml or struts-config.xml
This is how the web works. The server can only respond to requests made bye the client.
You could however try some Javascript solutions.
1) create a javascript timer that resets itself with each call to the server. If the timer reaches 30 mins (or whatever your session timeout is) then it alerts the user, telling them that their session has probably timed out.
2) you could have a polling frame run to keep their session active while they have the browser open.
You mentioned that it is too tedious to check for the existence of the session in every action. You might consider writing an abstract Action class that contains the logic for checking for the session and performing the appropriate forward if it doesn't exist. You could then extend all your action classes from this class.
