组合1 @Resource+@Service:
@Resource(name = "captchaService")
private CaptchaService captchaService;
@Service("captchaService")
public class CaptchaServiceImpl implements CaptchaService {
组合2 @Autowired+@Service:
@Autowired
private CaptchaService captchaService;
@Service("captchaService")
public class CaptchaServiceImpl implements CaptchaService {
组合3 @Autowired+@Component:
@Autowired
private CaptchaService captchaService;
@Component
public class CaptchaServiceImpl implements CaptchaService {