错误描述:
springboot的Web项目编译运行时提示错误:Field userService in com.cetc.UserManger.controller.UserController required a bean of type 'com.cetc.UserManger.service.UserService' that could not be found.
解决办法:
在提示错误的service的实现类impl上添加注解@Service。如下代码所示:
UserRepository的代码如下:
public interface UserRepository extends JpaRepository<User,Integer> { }
UserService的代码如下:
public interface UserService { public Page<User> findAll(Pageable pageable); }
UserServiceImpl的代码如下:
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserRepository userRepository;
@Override
public Page<User> findAll(Pageable pageable){
return userRepository.findAll(pageable);
}
}
UserController的代码如下:
@RestController @RequestMapping("/user") public class UserController { @Autowired private UserService userService; @GetMapping("/findAll/{page}/{size}") public Page<User> findAll(@PathVariable("page") Integer page, @PathVariable("size") Integer size){ PageRequest request=PageRequest.of(page,size);//注意:page的索引是从0开始的,size的索引是从1开始的 return userService.findAll(request); } }