bean注入失败

entity：

@Entity
@Table(name = "rolesInfo")
public class JpaRolesInfo {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)//自增
    private Integer id;
    @Column(length = 15)
    private String roleName;//角色名称
    private Date time;//出现时间
    @Column(length = 2)
    private String weight;//角色分量

DynamicRepository：

 @Repository
public interface DynamicRepository extends JpaSpecificationExecutor<JpaRolesInfo>{
    List<JpaRolesInfo> findAll(Specification<JpaRolesInfo> spec,Integer id,String roleName);
}

JpaDynamicService：

@Service
public class JpaDynamicService {
    
    @Autowired
    private DynamicRepository repository;
    
    public List<JpaRolesInfo> findAll(Integer id, String roleName) {
        List<JpaRolesInfo> list =  repository.findAll((Root<JpaRolesInfo> root, CriteriaQuery<?> query, CriteriaBuilder cb)->{
            List<Predicate> predicates = new ArrayList<Predicate>();
            if(roleName != null)predicates.add(cb.like(root.get("roleName").as(String.class), "%" + roleName + "%"));
            if(id != null)predicates.add(cb.equal(root.get("id").as(Integer.class),id));
            return (Predicate) query.where(predicates.toArray(new Predicate[predicates.size()]));
        },id,roleName);
        return list;
    }

}

DemoController：

@RestController
@RequestMapping(value="/api/demo")
public class DemoController {
    
    @Autowired
    private JpaDynamicService DyService;
    
    @RequestMapping(value="/test", method = RequestMethod.GET)
    public void test() {
        //动态查询(null,null)
        System.out.println("dynamic query:" + DyService.findAll(null, null));
        //动态查询(1,null)
        System.out.println("dynamic query:" + DyService.findAll(1, null));
    }

错误信息：

Description:

Field repository in com.example.demo.service.JpaDynamicService required a bean of type 'com.example.demo.repository.DynamicRepository' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'com.example.demo.repository.DynamicRepository' in your configuration.

试了很多方法都不行。。。不知道该怎么写了。。。