December 2007
Intermediate to advanced
736 pages
16h 19m
English
book
Core Servlets and JavaServer Pages, Volume 2: Advanced Technologies, Second Edition
by Marty Hall, Larry Brown, Yaakov Chaikin
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Chapter 12. The Struts Framework: Validating User Input
Topics in This Chapter
- Manually validating input fields in an
ActionorActionForm - Returning to the input page when errors occur
- Displaying messages with the
html:messagestag - Using rules in validation.xml to check input fields
- Adding client-side JavaScript validation
Probably the most tedious and time-consuming part of developing a Web site is validation of the input data. There is no easy way of getting around it—you have to check for missing or poorly formatted input values. Unfortunately, the servlet and JSP APIs provide no mechanism for easily validating input data!
To the rescue come the Struts Validation framework. The framework is incredibly flexible and easy to use, supporting ...
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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.