通过@Service注解无法创建Service的实例对象，有伙伴们遇到过这个问题吗

Question

@Service
public class AdminServiceImpl implements AdminService {
    @Autowired
    private AdminDao adminDao;
    @Override
    public void insert(Admin admin) {
        adminDao.insert(admin);

    }

@Service/*service的实现类使用了注解*/
public class AdminServiceImpl implements AdminService {
    @Autowired
    private AdminDao adminDao;
    @Override
    public void insert(Admin admin) {
        adminDao.insert(admin);

    }


@Controller
public class AdminController {
/*这里会报错，提示adminService为空*/
    @Autowired
    private AdminService adminService;
    @RequestMapping("/adminAdd.do")
    public  void adminAdd(){
    }
}

在spring的配置文件中有配置扫描的包，但是还是为空

<context:component-scan base-package="com.zjw.survey.service"/>

Answer 1

@Resource(type = AdminServiceImpl.class)
private AdminService adminService;

这样注入

// @Autowired 这样注入的时候 AdminService 找不到实现类