Spring Boot i18n Customer LocaleResolver

AcceptHeaderResolver.java

public class AcceptHeaderResolver extends AcceptHeaderLocaleResolver {

    private static final String LOCALE_PARAM = "locale";

    @Override
    public Locale resolveLocale(HttpServletRequest request) {
        String localeParam = request.getParameter(LOCALE_PARAM);
        if (StringUtils.hasText(localeParam)) {
            Locale locale = StringUtils.parseLocaleString(localeParam);
            this.setDefaultLocale(locale);
            return locale;
        }
        return super.resolveLocale(request);
    }
}

LocaleConfig.java

@Configuration
public class LocaleConfig {

    @Bean
    public LocaleResolver localeResolver() {
        return new AcceptHeaderResolver();
    }
}