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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376
SpringMVC の応用
7
HandlerInterceptor の利用
Controller
でハンドリングする処理に対してだけ共通処理を実行したい場合は、
org.springframework.web.
servlet.HandlerInterceptor
インターフェイスの 実 装クラスを作 成します。
HandlerInterceptor
は 、リク エ
ストにマッピングされた
Handler
メソッドが決定した後に呼び出されるので、アプリケーションが許可している
リクエストに対してのみ共通処理を実行することができます（
図7.6）。
HandlerInterceptor
には 、以 下 の
3
つ の メ ソッドが 用 意 さ れ て おり、
Spring MVC
のフレームワーク機能が
呼 び 出しタイミ ン グを 制 御して います（
表7.5）。
表
7.5
HandlerInterceptor
のメソッド
クラス名 説明
preHandle
Controller の Handler メソッドを実行する前に呼び出される。Handler メソッドの呼び出しを中止す
る場合は、メソッドの戻り値として
false
を返却する
postHandle
Controller のHandlerメソッドが正常終了した後に呼び出される。このメソッドは、Handler メソッド
で例外が発生した場合は呼び出されない
afterCompletion
Controller のHandlerメソッドの処理が終了した後に呼び出される。このメソッドは、 ...
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