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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6.6 REST クライアントの実装
エラー応答のハンドリング
RestTemplate
のデフォルト実装では、エラー系（
HTTP
ステータスコードが
400
以上）の応答があった場合
に以下の例外が発生します（
表6.8）。
表
6.8
エラー系の応答があった場合の例外
HTTP
ステータスコード 例外クラス
ユーザー定義のステータスコード
org.springframework.web.client.UnknownHttpStatusCodeException
クライアントエラー系（4xx）
org.springframework.web.client.HttpClientErrorException
サーバーエラー系（5xx）
org.springframework.web.client.HttpServerErrorException
これらの例外は実行時例外（
RuntimeException
）を継承しているため捕捉する義務がありません。そのた
め、アプリケーションの要件に応じて捕捉して例外処理を行なう必要があります。なお、デフォルトの動作は
ResponseErrorHandler
の実装クラスを作成することで変更することができます。
タイムアウトの指定
サーバーとの通信に対してタイムアウト時間を指定する場合は、以下のような
Bean
定義を行ないます。
JavaConfigを使用したBean定義例
@Bean
RestTemplate ...
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