【Spring】@Valueアノテーションとは - IT技術総合Wiki

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@Value

◀ 25. 【Spring】@Valueアノテーションとは

本稿はSpringFrameworkの@Valueについて説明します。

@Valueとは

@Valueはフィールド単位で付与するアノテーションです。

@Valueが付与されたフィールドは、プロパティファイルの設定値が代入されます。

以下、@Valueを使用したサンプルです。

まずは@Valueを使用して値を代入するbeanクラスを定義します。

@Component
public class TestBean {

@Value("${test.id}")
private String name;

@Value("${test.password}")
private int age;

}

続いてプロパティファイルを読み込むConfigファイルを定義します。

@Configuration
@ComponentScan
@PropertySource(value = {"classpath:test.properties"})
public class TestConfig {

   @Bean
public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
return new PropertySourcesPlaceholderConfigurer();
}

}

最後に設定値を定義するプロパティファイルを定義しましょう。

test.id = kushiage
test.password = umai

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