ClientRepository应该用
@Repository标记注释。使用你当前的配置，Spring将不会扫描该类并对其有所了解。在启动和连接时，找不到ClientRepository类。
编辑 如果添加
@Repository标签没有帮助，那么我认为问题可能出在
ClientServiceand
ClientServiceImpl。
尝试用注释
ClientService（接口）
@Service。由于你应该只为服务提供一个实现，因此不需要使用
optional参数指定名称
@Service("clientService")。Spring将根据接口名称自动生成它。另外，如Bruno所述，由于你只有该服务的单个实现，因此
@Qualifier不需要
ClientController。
ClientService.java
@Servicepublic interface ClientService { void addClient(Client client);}ClientServiceImpl.java（选项1）
@Servicepublic 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（选项2 /首选）
@Servicepublic class ClientServiceImpl implements ClientService{ @Autowired private ClientRepository clientRepository; @Transactional public void addClient(Client client){ clientRepository.saveAndFlush(client); }}ClientController.java
@Controllerpublic 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"; }}
