스프링 MessageSource

MessageSource는 국제화 기능을 제공하는 인터페이스이다.

 

ApplicationContext는 MessageSource는 상속 받기 때문에 ApplicationContext를 사용해도 됨.

 

-아래와 같은 properties를 생성하여 사용하면 됨-

 

messages.properties (default)

messages_ko_kr.properties (한국어)

 

package com.example.demo;
 
import java.util.Locale;
 
import org.apache.logging.log4j.message.Message;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.context.ApplicationContext;
import org.springframework.context.MessageSource;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;
 
@Component
public class AppRunner implements ApplicationRunner {
    
    @Autowired
    MessageSource messageSource;
    
    @Autowired
    ApplicationContext ctx;
 
    @Autowired
    BookRepository bookRepository;
    
    @Value("${app.name}")
    String appName;
    
    @Override
    public void run(ApplicationArguments args) throws Exception {
        // TODO Auto-generated method stub
        
        Environment environment = ctx.getEnvironment();
        System.out.println(environment.getProperty("app.name"));
        System.out.println(appName);
        
            System.out.println(messageSource.getMessage("greeting", new String[]{"bins"}, Locale.KOREA));
            System.out.println(messageSource.getMessage("greeting", new String[]{"bins2"}, Locale.getDefault()));
      
        
    }
    
 
}
 

 

아래와 같이 ReloadableResourceBundleMessageSource 객체를 이용하여 Bean을  생성하면, Reloadable 하게 운영할 수 있다. (즉 운영 중에, message를 바꿀 수 있음.) 

 

package com.example.demo;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.AbstractResourceBasedMessageSource;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;
 
@SpringBootApplication
@PropertySource("classpath:/app.properties")
public class Demo1Application {
 
    public static void main(String[] args) {
        SpringApplication.run(Demo1Application.class, args);
    }
 
    @Bean
    public MessageSource messageSource() {
        MessageSource messageSource = new ReloadableResourceBundleMessageSource();
        ((AbstractResourceBasedMessageSource) messageSource).setBasename("classpath:/messages");
        ((AbstractResourceBasedMessageSource) messageSource).setDefaultEncoding("UTF-8");
        ((AbstractResourceBasedMessageSource) messageSource).setCacheSeconds(3);
        return messageSource;
    }
    
}