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Understanding session variables
Session variables are used to store information and make it available to all the pages in the application for the duration of the user's visit. The server creates a different session for each user and maintains it for a set period of time or until the session is explicitly terminated.
Note: For readers familiar with the Java programming language, session objects are implicit objects in JSP. As such, you don't need to instantiate them in your code.
For more information on session variables, see Using session variables in your Web application.
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