hibernate的查询

public List<Weibo> selectOne(int k){
Session session = HibernateUtil.currentSession();
try {
Criteria c=session.createCriteria(Weibo.class);
c.add(Restrictions.eq("weiboId","M_Boj1Wc4xC"));//eq是等于，gt是大于，lt是小于,or是或
List<Weibo> list = (List<Weibo>)c.list();
return list;
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
System.err.println("select failed!!!!!!");
}finally{
HibernateUtil.closeSession();
HibernateUtil.sessionFactory.close();
}
return null;
}

Session session = HibernateUtil.currentSession();
try {
//from后面是对象，不是表名
String hql="from Weibo as weibo";//使用命名参数，推荐使用，易读。
Query query = session.createQuery(hql);
query.setFirstResult(k);
query.setMaxResults(1);
List<Weibo> list = (List<Weibo>)query.list();
return list;
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
System.err.println("select failed!!!!!!");
}finally{
HibernateUtil.closeSession();
HibernateUtil.sessionFactory.close();
}
return null;
}

public List<String> selectOne1(int k){
Session session = HibernateUtil.currentSession();
try {
String sql = "select image from t_weiboo limit 5,1;";
Query query = session.createSQLQuery(sql);
List<String> list = query.list();
return list;
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
System.err.println("select failed!!!!!!");
}finally{
HibernateUtil.closeSession();
HibernateUtil.sessionFactory.close();
}
return null;
}

public void update1() {

Session session = HibernateUtil.currentSession();
Transaction tx = session.beginTransaction();
Weibo wb = (Weibo) session.get(Weibo.class, 3);
wb.setImagePath("");
session.update(wb);
tx.commit();

}

<span style="white-space:pre">	</span>public Weibo selectOne1(int k){
Session session = HibernateUtil.currentSession();
try {
//from后面是对象，不是表名
String hql="from Weibo as weibo";//使用命名参数，推荐使用，易读。
Query query = session.createQuery(hql);
query.setFirstResult(k);
query.setMaxResults(1);
Weibo weibo = (Weibo)query.uniqueResult();
return weibo;
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
System.err.println("select failed!!!!!!");
}finally{
HibernateUtil.closeSession();
HibernateUtil.sessionFactory.close();
}
return null;
}