SpringBoot最简洁的国际化配置

mess.user.name=用户名  
mess.user.password=密码  
mess.user.btn=登录  

mess.user.name=用户名  
mess.user.password=密码  
mess.user.btn=登录  

mess.user.name=UserName  
mess.user.password=Password  
mess.user.btn=Sign In

#表示放在classpath的i18n文件夹，文件前缀为mess  
spring.messages.basename=i18n.mess  

@Configuration
public class I18nConfig implements WebMvcConfigurer
{
    @Bean
    public LocaleResolver localeResolver()
    {
        SessionLocaleResolver slr = new SessionLocaleResolver();
        // 默认语言
        slr.setDefaultLocale(Locale.SIMPLIFIED_CHINESE);
        return slr;
    }
    @Bean
    public LocaleChangeInterceptor localeChangeInterceptor()
    {
        LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
        // 参数名
        lci.setParamName("lang");
        return lci;
    }
    @Override
    public void addInterceptors(InterceptorRegistry registry)
    {
        registry.addInterceptor(localeChangeInterceptor());
    }
}