May 2024
Intermediate to advanced
752 pages
24h
Japanese
Content preview from Spring徹底入門 第2版 Spring FrameworkによるJavaアプリケーション開発
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486
SpringDataJPA
10
第
3
章では
Spring JDBC
を用いて
SQL
を記述するデータベース連携の方法について紹介しました。本章で
は、
Spring Data JPA
の機能を使用して
JPA
（
Java Persistence API
）を 用 い る こ と で 、
SQL
を書かずにデータベー
ス連携を行なうアプリケーションを開発する方法を解説していきます。
まず、
Java EE
で標準化されている
JPA
についての概要と利用方法を紹介します。
JPA
そのものについての理
解を深めたうえで 、
Spring
から提供されている強力なフレームワークである
Spring Data JPA
を使用し、
Spring
アプリケーションで
JPA
を利用する方法について紹介していきます。
10.1
JPA
（Java Persistence API）と は
JPA
は
2006
年にリリースされた
Java EE 5
で仕様が定められている
Java
標準の
ORM
（
Object-Relational
Mapping
、
Object-Relational Mapper
）です 。本 書 には
ORM
や
JPA
について詳細に紹介するほどの紙幅はない
ため、
Spring Data JPA
を使用するうえで最低限必要になることを厳選して紹介していきます。
ORM と JPA の概念
ORM
の概念を一言で説明すると、「リレーショナルデータベース（以下、データベースと略す）への読み書
きを、オブジェクトへのアクセスにより透過的に実現する仕組み」です。商
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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.