db-i18n LanguageService

@Service
public class LanguageService implements LanguageServiceInf {
    
    @Autowired
    private LanguageRepository languageRepository;

    @Override
    public Map<String, String> getAllMessageByLocale(String locale) {
        List<LanguageEntity> langList = languageRepository.findAllByLocale(locale);
        return langList
                .stream()
                .collect(Collectors.toMap(x -> x.getKey(), x -> x.getContent()));
    }
    //....
}