April 2001
Intermediate to advanced
780 pages
23h 48m
English
Content preview from Java Servlet Programming, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 20. What’s New in the Servlet 2.3 API
Shortly before this book went to print, Sun Microsystems published the Proposed Final Draft of the Servlet API 2.3 specification.[71]
This is not the specification’s final form; the Proposed Final Draft is one step away from a formal Final Release and technical details are still subject to change. However, those changes should not be significant—in fact, server vendors have already begun to implement the new features. In this chapter, I will review in detail everything that changed between API 2.2 and API 2.3. I will also explain the reasons for the changes and demonstrate how to write servlets using the new features.[72]
Changes in the Servlet API 2.3
Servlet API 2.3 actually leaves the core of servlets relatively untouched, which indicates that servlets have reached a high level of maturity. Most of the action has involved adding new features outside the core. Among the changes:
Servlets now require JDK 1.2 or later.
A filter mechanism has (finally) been created.
Application lifecycle events have been added.
New internationalization support has been added.
The technique to express inter-JAR dependencies has been formalized.
Rules for class loading have been clarified.
New error and security attributes have been added.
The
HttpUtilsclass has been deprecated.Various new helpful methods have been added.
Several DTD behaviors have been expanded and clarified.
Other clarifications have been made, but they mostly concern server vendors, not general ...
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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.