考慮在你的配置中定義一個'org.modelmapper.ModelMapper'型別的bean

應用程式無法啟動

Kodlama.io.Devs.business.concretes.ProgrammingLanguageManager 中建構式的引數 1 需要一個無法找到的“org.modelmapper.ModelMapper”型別的 bean。

考慮在你的配置中定義一個 'org.modelmapper.ModelMapper' 型別的 bean。

編程語言管理器

@Service
public class ProgrammingLanguageManager implements ProgrammingLanguageService {

    @Autowired
    private ProgrammingLanguageRepository programmingLanguageRepository;
    private ModelMapper modelMapper;

    @Autowired
    public ProgrammingLanguageManager(ProgrammingLanguageRepository programmingLanguageRepository,
            ModelMapper modelMapper) {
        this.programmingLanguageRepository = programmingLanguageRepository;
        this.modelMapper = modelMapper;

    }

    // * * * CRUD OPERATIONS * * *

    @Override
    public CreateProgrammingLanguageResponse add(CreateProgrammingLanguageRequest createProgrammingLanguageRequest)
            throws Exception {
        nameCannotBeSame(createProgrammingLanguageRequest.getName());

        ProgrammingLanguage programmingLanguage = modelMapper.map(createProgrammingLanguageRequest,
                ProgrammingLanguage.class);
        ProgrammingLanguage saveProgrammingLanguageResult = programmingLanguageRepository.save(programmingLanguage);

        CreateProgrammingLanguageResponse createProgrammingLanguageResponse = modelMapper
                .map(saveProgrammingLanguageResult, CreateProgrammingLanguageResponse.class);

        return createProgrammingLanguageResponse;
    }

    @Override
    public UpdateProgrammingLanguageResponse update(UpdateProgrammingLanguageRequest updateProgrammingLanguageRequest)
            throws Exception {
        nameCannotBeSame(updateProgrammingLanguageRequest.getName());

        ProgrammingLanguage programmingLanguage = modelMapper.map(updateProgrammingLanguageRequest,
                ProgrammingLanguage.class);
        ProgrammingLanguage saveProgrammingLanguageResult = programmingLanguageRepository.save(programmingLanguage);

        UpdateProgrammingLanguageResponse updateProgrammingLanguageResponse = modelMapper
                .map(saveProgrammingLanguageResult, UpdateProgrammingLanguageResponse.class);

        return updateProgrammingLanguageResponse;
    }

    @Override
    public DeleteProgrammingLanguageResponse delete(DeleteProgrammingLanguageRequest deleteProgrammingLanguageRequest) {

        ProgrammingLanguage getReferenceByIdProgrammingLanguageResult = programmingLanguageRepository
                .getReferenceById(deleteProgrammingLanguageRequest.getId());
        programmingLanguageRepository.delete(getReferenceByIdProgrammingLanguageResult);

        DeleteProgrammingLanguageResponse deleteProgrammingLanguageResponse = modelMapper
                .map(getReferenceByIdProgrammingLanguageResult, DeleteProgrammingLanguageResponse.class);

        return deleteProgrammingLanguageResponse;
    }

    // * * * GET METHODS * * *

    @Override
    public List<GetAllProgrammingLanguagesResponse> getAll() {

        List<ProgrammingLanguage> findAllProgrammingLanguageResult = programmingLanguageRepository.findAll();

        return modelMapper.map(findAllProgrammingLanguageResult,
                new TypeToken<List<GetAllProgrammingLanguagesResponse>>() {
                }.getType());
    }

    @Override
    public GetByIdProgrammingLanguageResponse getById(
            GetByIdProgrammingLanguageRequest getByIdProgrammingLanguageRequest) {

        ProgrammingLanguage getReferenceByIdProgrammingLanguageResult = programmingLanguageRepository
                .getReferenceById(getByIdProgrammingLanguageRequest.getId());

        GetByIdProgrammingLanguageResponse getByIdProgrammingLanguageResponse = modelMapper
                .map(getReferenceByIdProgrammingLanguageResult, GetByIdProgrammingLanguageResponse.class);

        return getByIdProgrammingLanguageResponse;
    }

    public GetByNameProgrammingLanguageResponse getByName(
            GetByNameProgrammingLanguageRequest getByNameProgrammingLanguageRequest) {

        ProgrammingLanguage getReferenceByNameProgrammingLanguageResult = new ProgrammingLanguage();
        getReferenceByNameProgrammingLanguageResult = programmingLanguageRepository
                .getByName(getByNameProgrammingLanguageRequest.toString());

        GetByNameProgrammingLanguageResponse getByNameProgrammingLanguageResponse = modelMapper
                .map(getReferenceByNameProgrammingLanguageResult, GetByNameProgrammingLanguageResponse.class);

        return getByNameProgrammingLanguageResponse;
    }

    // * * * BUSINESS RULES * * *

    private void nameCannotBeSame(String name) throws Exception {

        ProgrammingLanguage programmingLanguage = programmingLanguageRepository.getByName(name);

        var result = programmingLanguage;

        if (result != null) {
            throw new Exception(Messages.NAME_ALREADY_EXISTS);
        }
    }
}

我錯過了一些東西，但我不知道是什么

uj5u.com熱心網友回復：

您的 ModelMapper 類沒有注冊為 spring bean，它只是一個普通的 java 類。為了解決這個問題，@Configuration如果你想自動裝配它，你需要創建一個定義 bean 的類。

@Configuration
public class AppConfiguration {
    @Bean
    public ModelMapper modelMapper() {
        return new ModelMapper();
    }
} 

否則，您不能進行依賴注入，您必須自己創建物件new ModelMapper();

另一個提示是避免使用@Autowire. 建構式級別的注釋就足夠了。

uj5u.com熱心網友回復：

從錯誤訊息中可以清楚地看出bean of type 'org.modelmapper.ModelMapper'缺少 。因此，請將以下 bean 添加到您的專案中，然后重試。

@Bean
public ModelMapper modelMapper() {
    return new ModelMapper();
}

注意： 將此 bean 添加到用@Configuration.

標籤：爪哇春天弹簧靴映射模型映射器

上一篇：-1L使用SpringBoot對Mongodb中的欄位值進行排序

下一篇：SpringJpaRepository@Query中的多個JOIN