从源码MessageSource的三个实现出发实战spring·i18n国际化 - 简熵 - 博客园

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.MessageSource;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;import java.util.Locale;
import java.util.ResourceBundle;@SpringBootApplication
public class HelloWorldSpringbootApplication {// ReloadableResourceBundleMessageSource可以加载指定项目以外的国际化文件private static String zhPath ="file:D:/temp/content";public static void main(String[] args) {// SpringApplication.run(HelloWorldSpringbootApplication.class, args);getSpringContent();}@Beanpublic ReloadableResourceBundleMessageSource messageSource() {ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();messageSource.setBasenames(zhPath, "classpath:content");return messageSource;}public static void getSpringContent() {AnnotationConfigApplicationContext ctx =new AnnotationConfigApplicationContext(HelloWorldSpringbootApplication.class);MessageSource source = ctx.getBean(MessageSource.class);Locale localeZh = new Locale("zh","CN");String hello = source.getMessage("hello", null, localeZh);System.out.println("hello = " + hello);}public static void getContent() {Locale localeEn = new Locale("en","US");Locale localeZh = new Locale("zh","CN");ResourceBundle res = ResourceBundle.getBundle("content", localeZh);String hello = res.getString("hello");System.out.println("hello = " + hello);}
}

再加三个文件：

content.properties

hello=123

content_en_US.properties

hello=hello_world

content_zh_CN.properties

hello=456