June 2013
Beginner
608 pages
17h 57m
English
Content preview from Beginning Java EE 7
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CHAPTER 3
Bean Validation
The previous chapter talked about Context and Dependency Injection which has become a central and common specification across Java EE. It solves recurrent problems (injection, alternatives, stereotypes, producers . . .) that developers have in their day-to-day job. Validating data is also a common task that is spread across several, if not all, layers of today’s applications (from presentation to database). Because processing, storing, and retrieving valid data are crucial for an application, each layer defines validation rules its own way. Often the same validation logic is implemented in each layer, proving to be time-consuming, ...
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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.