为什么我的spring@Autowired的字段为空

为什么我的spring@Autowired的字段为空

为什么我的spring@Autowired的字段为空
// dao
public class BaseDaoHibernate<T, ID extends Serializable> extends
HibernateDaoSupport implements BaseDao<T, ID> {
protected Class<T> persistentClass;

@Autowired
public void setSessionFactory0(SessionFactory sessionFactory) {
super.setSessionFactory(sessionFactory);
}

@Repository("authorizeDao")
public class AuthorizeDaoHibernate extends BaseDaoHibernate<Authorize, Long>
implements AuthorizeDao {
private Criteria getAuthorizeCriteria(Authorize auth) {
Criteria crit = getCriteria();
Example example = Example.create(auth);
example.enableLike(MatchMode.ANYWHERe);
crit.add(example);
if (auth.getDate_s() != null) {
crit.add(Restrictions.ge("createDate", auth.getDate_s()));
}
if (auth.getDate_e() != null) {
crit.add(Restrictions.le("createDate", auth.getDate_e()));
}
return crit;
}

// service
@Service("authorizeService")
public class AuthorizeServiceImpl implements AuthorizeService {
@Autowired
private AuthorizeDao authorizeDao;

public Authorize getAuthorizeByAuthId(Long authId) {
return authorizeDao.getById(authId);
}

public List<Authorize> findAll() {
return authorizeDao.findAll();
}

//action
@SuppressWarnings("serial")
public class AdminAction extends AuthAction {
private SiteBackGroudUser user;
private Long keyId;

private List<Authorize> auths;

private Page page;

@Autowired
private SiteBackGroudUserService siteBackGroudUserService;

@Autowired
private AuthorizeService authorizeService;