データベースを使用する Spring l18n の場合、AbstractMessageSource を拡張します。Java 構成:
@Bean
public MessageSource messageSource(){
DataBaseMessageSource source = new DatabaseMessageSource();
return source;
}
@Bean
public LocaleResolver localeResolver(){
SessionLocaleResolver resolver = new SessionLocaleResolver();
resolver.setDefaultLocale(Locale.ENGLISH); //setup default locale
return resolver;
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
LocaleChangeInterceptor interceptor = new LocaleChangeInterceptor();
interceptor.setParamName("lang"); //will change current user locale when hit url with ?lang
registry.addInterceptor(interceptor);
}
と
public class DatabaseMessageBandle extends AbstractMessageSource {
@Autowired
private FooRepository fooRepo;
@Override
protected MessageFormat resolveCode(String code, Locale locale) {
String message = getMessage(code, locale);
MessageFormat messageFormat = createMessageFormat(message, locale);
return messageFormat;
}
@Override
protected String resolveCodeWithoutArguments(String code, Locale locale) {
return getMessage(code, locale);
}
private String getMessage(String code, Locale locale) {
String message = fooRepo.getMeesageByCodeAndLocale(code, locale); //better not do this
return message;
}
}
コントローラーで現在のロケールを取得する必要がある場合は、次のようにします。
@RequestMapping
public String index(Locale locale) { //you will have it
//or use LocaleContextHolder.getLocale, and it will return current thread locale
return "index";
}