January 2018
Intermediate to advanced
350 pages
9h 7m
English
Content preview from Java EE 8 High Performance
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JPA – the database link
The Java Persistence API (JPA) is the link to the database (MySQL for our quote application we created in chapter 1). Its goal is to enable an application to map the database model to Java objects. The gain is that we can use the database as any object.
For instance, consider the following table, which matches our quote representation in the database:
The preceding table can be converted into the following object in Java, thanks to JPA annotations:
While the tables are flat, mapping them in JPA is pretty straightforward, ...
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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.