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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290
Web アプリケーションの開発
5
@ExceptionHandler メソッドの利用
DefaultHandlerExceptionResolver
でハンドリングされない例外に対するエラー処理を実装するには、
@org.springframework.web.bind.annotation.ExceptionHandler
を付与したメソッドを作成します。
@ExceptionHandler
を付与したメソッドは、「
Controller
ク ラ ス 」「
ControllerAdvice
クラ ス（
@Control
lerAdvice
を付与したクラス）」に実装することができます。
Controller
固有の例外処理は
Controller
クラスに
実装し、アプリケーション全体で行なう共通的な例外処理は
ControllerAdvice
クラスに実装するのが一般的
な使い方です。
例外処理の内容が「遷移先のViewの指定」と「レスポンスコードの指定」だけの場合は、Spring
MVCから提供されている
org.springframework.web.servlet.handler.SimpleMappingExcep
tionResolver
を利用することで実現することができます。
SimpleMappingExceptionResolver
を使
用するには、
SimpleMappingExceptionResolver
を Bean定義して DI コンテナに登録する必要があ
ります。適用順を制御する必要がある場合は、 ...
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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.