@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"/>