spring 上下文未加载

Question

我尝试加载上下文，但得到 UnsatisfiedDependencyException 我无法理解原因是什么，提供了服务中的注释和构造函数

DataJpa存储库：

@Transactional(readOnly = true)

public interface DataJpaRepository extends JpaRepository<Visit, Long> {

    @Override

    @Transactional

    Visit save(Visit visit);

    Visit findByGuestId(long guestId);

    @Query("SELECT DISTINCT v FROM Visit v WHERE  v.date BETWEEN :from AND :to")

    List<Visit> getBetween(@Param("from") Date from, @Param("to") Date to);

}

@Repository

public class VisitRepositoryImpl implements VisitRepository {

    @Autowired

    private DataJpaRepository dataJpaRepository;

    @Override

    public Visit get(long guestId) {

        return dataJpaRepository.findByGuestId(guestId);

    }

    @Override

    public Visit save(Visit visit) {

        return dataJpaRepository.save(visit);

    }

    @Override

    public List<Visit> getAll() {

        return dataJpaRepository.findAll();

    }

    @Override

    public List<Visit> getBetween(Date from, Date to) {

        Objects.requireNonNull(from, "fromDate must not be null");

        Objects.requireNonNull(to, "toDate must not be null");

        return dataJpaRepository.getBetween(from, to);

    }

}

参观服务：

@Service

public class VisitService {

    private VisitRepositoryImpl repository;

    @Autowired

    public VisitService(VisitRepositoryImpl repository) {

        this.repository = repository;

    }

    public Visit save(Visit visit) {

        return repository.save(visit);

    }

    public List<Visit> getAll() {

        return repository.getAll();

    }

    public List<Visit> getBetween(Date from, Date to) {

        Assert.notNull(from, "fromDate must not be null");

        Assert.notNull(to, "toDate  must not be null");

        return repository.getBetween(from, to);

    }

}

Answer 1

尝试将您的存储库包添加到@ComponentScan配置中@ComponentScan({"com.java.library.service",&nbsp;"com.java.library.repository"})

Answer 2

尝试在 VisitService 类中添加 @Autowired 注解。@Autowiredprivate VisitRepositoryImpl repository;