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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542
11
Spring ＋ MyBatis
❶
jdbcTypeForNull
に
NULL
値の
JDBC
型を指定する。この設定により、Java の
null
値をJDBC の
NULL
型と扱う設定
となる
❷
defaultFetchSize
にデフォルトのフェッチサイズを指定する。MyBatis3.3 から有効になった設定であり、フェッチ
サイズのデフォルト値を定義することができる。マッピングファイルの
<select>
要素で、SQL 単位に個別にフェッ
チサイズを指定した場合はそちらが優先される
❸
マッピングファイル内で繰り返し使用されるパッケージ名を TypeAliasとして定義する。
<package>
要素の
name
属
性に指定したパッケージ配下に格納されているクラスは、クラス名がエイリアスとなり、
FQCN を記述する際に省略
できる。一般的に、戻り値の型を指定するために、戻り値の型が存在するパッケージ名を繰り返し記述することが多
いため、ここではそのパッケージ名を指定している
MyBatis の設定は、前述の
SqlSessionFactoryBean
経由で指定することもできます。MyBatis-
Spring 1.3.0 より、
<settings>
要素内に指定する設定も
SqlSessionFactoryBean
経由で指定可能
になり、MyBatis 設定ファイルを利用する必要がなくなりました。もちろん、従来どおり MyBatis
設定ファイルを利用することもできます。
11.3
基本的な CRUD 操作
本節で ...
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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.