UnsatisfiedDependencyException: Error creating bean with name

Question

For several days I'm trying to create Spring CRUD application. I'm confused. I can't solve this errors.

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'clientController': Unsatisfied dependency expressed through method 'setClientService' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'clientService': Unsatisfied dependency expressed through field 'clientRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.kopylov.repository.ClientRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

and this

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'clientService': Unsatisfied dependency expressed through field 'clientRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.kopylov.repository.ClientRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

ClientController

@Controller public class ClientController { private ClientService clientService;  @Autowired @Qualifier("clientService") public void setClientService(ClientService clientService){     this.clientService=clientService; } @RequestMapping(value = "registration/add", method = RequestMethod.POST) public String addUser(@ModelAttribute Client client){     this.clientService.addClient(client); return "home"; } } 

ClientServiceImpl

@Service("clientService") public class ClientServiceImpl implements ClientService{  private ClientRepository clientRepository;  @Autowired @Qualifier("clientRepository") public void setClientRepository(ClientRepository clientRepository){     this.clientRepository=clientRepository; }    @Transactional public void addClient(Client client){     clientRepository.saveAndFlush(client); } } 

ClientRepository

public interface ClientRepository extends JpaRepository<Client, Integer> {  } 

I looked through a lot of similar questions, but no one answer to them can't help me.

Answer 1

The ClientRepository should be annotated with @Repository tag. With your current configuration Spring will not scan the class and have knowledge about it. At the moment of booting and wiring will not find the ClientRepository class.

EDIT If adding the @Repository tag doesn't help, then I think that the problem might be now with the ClientService and ClientServiceImpl.

Try to annotate the ClientService (interface) with @Service. As you should only have a single implementation for your service, you don't need to specify a name with the optional parameter @Service("clientService"). Spring will autogenerate it based on the interface' name.

Also, as Bruno mentioned, the @Qualifier is not needed in the ClientController as you only have a single implementation for the service.

ClientService.java

@Service public interface ClientService {      void addClient(Client client); } 

ClientServiceImpl.java (option 1)

@Service public class ClientServiceImpl implements ClientService{      private ClientRepository clientRepository;      @Autowired     public void setClientRepository(ClientRepository clientRepository){         this.clientRepository=clientRepository;     }      @Transactional     public void addClient(Client client){         clientRepository.saveAndFlush(client);     } } 

ClientServiceImpl.java (option 2/preferred)

@Service public class ClientServiceImpl implements ClientService{      @Autowired     private ClientRepository clientRepository;      @Transactional     public void addClient(Client client){         clientRepository.saveAndFlush(client);     } } 

ClientController.java

@Controller public class ClientController {     private ClientService clientService;      @Autowired     //@Qualifier("clientService")     public void setClientService(ClientService clientService){         this.clientService=clientService;     }      @RequestMapping(value = "registration", method = RequestMethod.GET)     public String reg(Model model){         model.addAttribute("client", new Client());         return "registration";     }      @RequestMapping(value = "registration/add", method = RequestMethod.POST)     public String addUser(@ModelAttribute Client client){         this.clientService.addClient(client);     return "home";     } } 

Answer 2

I know it seems too late, but it may help others in future.

I face the same error and the problem was that spring boot did not read my services package so add:

@ComponentScan(basePackages = {"com.example.demo.Services"}) (you have to specify your own path to the services package) and in the class demoApplication (class that have main function) and for service interface must be annotated @Service and the class that implement the service interface must be annotated with @Component, then autowired the service interface.