June 2005
Beginner to intermediate
336 pages
6h 29m
English
Content preview from Java™ After Hours: 10 Projects You'll Never Do at Work
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Creating a Hit Counter Using Sessions
You need some way of storing data between page accesses, and one way of doing that is to use the session object, which comes built in to the JSP environment, ready for you to use. To use this object, you start with the JSP page directive at the top of the JSP page, setting this directive's session attribute to true to indicate that you want to use sessions:
<%@page import = "java.util.*" session="true"%>
This makes sure that opening this page starts a new session if such a session doesn't already exist.
NOTE
The page directive is not really necessary here, because the default for the session attribute is true, but it's included here just for completeness; you can omit it in your own code. More on this directive ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.