在hibernate多表查询中，都出错，虽有执行

Hibernate: select article0_.aid as aid0_, article0_.tid as tid0_, article0_.uid as uid0_, article0_.title as title0_, article0_.content as content0_, article0_.exam as exam0_, article0_.blushtime as blushtime0_, article0_.readCount as readCount0_ from t_article article0_  但是返回却是null。
DAO中实现

public List<Article> queryAll() throws Exception {
  List<Article> list=(List<Article>) getHibernateTemplate().find("FROM Article");
  if(list==null){
   System.out.print("null list");
   return null;
  }
  return list;
 }

service层就调用，

Action层：

public String queryAll(){
  try {
   articleList=(List<Article>)articleService.queryAll();
  } catch (Exception e) {
   return "queryAllFail";
  }
  return "queryAllSuc";
 }

总是返回queryAllFail 到错误页面。

希望大家帮忙解决！谢谢