@Configuration
public class MyWebMvcConfig implements WebMvcConfigurer {

    @Autowired
    private MessageSource messageSource;

    /**
     * 设置MessageSource文件位置
     * @return
     */
   /* @Bean
    public MessageSource messageSource(){
        ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
        messageSource.setDefaultEncoding("UTF-8");
        messageSource.setBasenames("classpath:i18n/messages");
        return messageSource;
    }*/

    /**
     * 这里特别要说明下,这里需要重写 WebMvcConfigurer#getValidator方法才能使校验时国际化生效!!!
     * @return
     */
    @Override
    public Validator getValidator(){
        LocalValidatorFactoryBean localValidatorFactoryBean = new LocalValidatorFactoryBean();
        localValidatorFactoryBean.setValidationMessageSource(messageSource);
        return localValidatorFactoryBean;
    }

}