September 12, 2008 at 12:47 PM
page scope : When a object is associated with particular request to the active page.
requestscope: when object is associated with the particular client request.
if request is forwarded to another jsp action or if another jsp is include this action, the object will available.
session scope: The object will available during any request made by the same client within the current session
application scope: Object will available in any jsp page with in the same web application.
depends your application.