Spring Boot Internalization Configuration Class

LocaleConfiguration.java

/**
 * Configuration class for Internationalization
 */
@Configuration
public class LocaleConfiguration implements WebMvcConfigurer {

  /**
   * * @return default Locale set by the user
   */
  @Bean(name = "localeResolver")
  public LocaleResolver localeResolver() {
    SessionLocaleResolver slr = new SessionLocaleResolver();
    slr.setDefaultLocale(Locale.US);
    return slr;
  }

  /**
   * an interceptor bean that will switch to a new locale based on the value of the language parameter appended to a request:
   *
   * @param registry
   * @language should be the name of the request param i.e  localhost:8010/api/get-greeting?language=fr
   * <p>
   * Note: All requests to the backend needing Internationalization should have the "language" request param
   */
  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    LocaleChangeInterceptor localeChangeInterceptor = new LocaleChangeInterceptor();
    localeChangeInterceptor.setParamName("language");
    registry.addInterceptor(localeChangeInterceptor);
  }