IoC 컨테이너 (4) : MessageSource

9. MessageSource

국제화 (i18n) 기능을 제공하는 인터페이스

ApplicationContext extends MessageSource

• getMessage(String code, Object[] args, String, default, Locale, loc)
• ...

@Component
public class AppRunner implements ApplicationRunner {
    /*
    @Autowired
    MessageSource messageSource;
    */

    @Autowired
    ApplicationContext messageSource;

    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println(messageSource.getClass());
        System.out.println(messageSource.getMessage("greeting", new String[]{"spring"}, Locale.KOREA));
        System.out.println(messageSource.getMessage("greeting", new String[]{"spring"}, Locale.getDefault()));
    }
}

리로딩 기능이 있는 메시지 소스 사용하기

@Bean 
public MessageSource messageSource() { 
    var messageSource = new ReloadableResourceBundleMessageSource(); 
    messageSource.setBasename("classpath:/messages"); 
    messageSource.setDefaultEncoding("UTF-8"); 
    messageSource.setCacheSeconds(3); 
    return messageSource;

@SpringBootApplication
public class Springtest5Application {

    public static void main(String[] args) {
        SpringApplication.run(Springtest5Application.class, args);
    }

    @Bean
    public MessageSource messageSource(){
        var messageSource = new ReloadableResourceBundleMessageSource();
        messageSource.setBasename("classpath:/messages");
        messageSource.setDefaultEncoding("UTF-8");
        messageSource.setCacheSeconds(3);
        return messageSource;
    }
}

@Component
public class AppRunner implements ApplicationRunner {
    /*
    @Autowired
    MessageSource messageSource;
    */

    @Autowired
    ApplicationContext messageSource;

    @Override
    public void run(ApplicationArguments args) throws Exception {
        while(true){
            System.out.println(messageSource.getMessage("greeting", new String[]{"spring"}, Locale.KOREA));
            System.out.println(messageSource.getMessage("greeting", new String[]{"spring"}, Locale.getDefault()));
            Thread.sleep(1000);
        }
    }
}

이렇게 사용하면 message 소스를 바꾼 후 build하면 message를 바꿀 수도 있다.

참고

• 인프런 : 스프링 프레임워크 핵심 기술(백기선)