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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11.2 Spring ＋ MyBatis のセットアップ
MyBatis の設定
MyBatis
の設定は、
MyBatis
設定ファイルを使用して行ないます。
Spring
と連携する場合は、大部分の設定を
Spring
の
Bean
定義として設定できるため、
MyBatis
設定ファイルにおける必須の設定項目はありません。デ
フォルトの動作を変更したい場合に設定するようにします。
MyBatis
の設定は多数の設定項目が存在するため、
内容については
MyBatis
リフ ァ レ ン ス の「
Configuration
【3】
」を参照してください。ここでは、アプリケーション
の特性に依存しない設定項目（どのようなアプリケーションにおいても一般的に設定しておくことが望ましい設
定項目）について説明します。
●
NULL 値と JDBC 型のマッピング設定
使 用 するデ ー タ ベ ー ス（
JDBC
ドライバ）によっては、カラム値を
null
に設定するとエラーが発生しま
す 。これは
MyBatis
のデフォルト値 が
JDBC
型の
OTHER
型にマッピングされているためで、
JDBC
ドライバが
null
値の設定と認識できる
JDBC
型を指定することで解決できます。
●
フェッチサイズ
複数行の検索結果を返す際、処理性能に影響を及ぼすフェッチサイズのデフォルト値を設定します。デフォ
ルト値を設定しない場合、フェッチサイズは
JDBC
ドライバの実装に依存するため、
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and much more.
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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.