java.lang.IllegalArgumentException: sessionFactory or hibernateTemplate is required 错误解决方法

 java.lang.IllegalArgumentException: sessionFactory or hibernateTemplate is required

有时候copy多了，会发傻，检查xml配置文件几遍都是没有问题，其实仔细检查会发现
public class RequestHistoryServiceImpl extends BHibernateDaoSupport implements RequestService, IsGoOnService {
 private RequestDao requestDao;
 
 public void setRequestDao(RequestDao requestDao) {
  this.requestDao = requestDao;

  ...
 }

这个就致命了，日志只会给出错误提示sessionFactory or hibernateTemplate is required。