//hql语句查询
 public ArrayList findClassByHql(String hql){
  ArrayList list= new ArrayList();
  Session session=null;
  Transaction tc=null;
  try{
   session=HibernateSessionFactory.getSession();
   tc=session.beginTransaction();
   Query qy=session.createQuery(hql);
   if(qy!=null){
    list=(ArrayList)qy.list();
   }
   tc.commit();
  }catch(Exception e){
   e.printStackTrace();
  }
  finally
  {
   if(session!=null)
   {
    session.close();
   }
  }
  
  return list;
 }

//通过ID得到类,
 public Account findAccountByID(String userName){
  Account account=new Account();
  Session session=null;
  Transaction tc=null;
  try{
   session=HibernateSessionFactory.getSession();
      tc=session.beginTransaction();
      account =(com.my.jkp.hibernate.Account)session.load(com.my.jkp.hibernate.Account.class,userName );   
  }catch(Exception e){
   e.printStackTrace();
   if(tc!=null){
    tc.rollback();
   }
  }
  finally{
   if(session!=null){
    session.close();
   }
  }
  return account;
 }

 //查询所有用户信息
 public ArrayList findAllAccount(){
  ArrayList list=new ArrayList();  
  String hql="from Account";
  list=this.findClassByHql(hql);
  return list;
 }

 //增加用户
 public boolean saveAccount(Account account){
  boolean tag=false;
  Session session=null;
  Transaction tc=null;
  try{
   session=HibernateSessionFactory.getSession();
   tc=session.beginTransaction();
   session.save(account);
   tc.commit();
  }catch(Exception e){
   e.printStackTrace();
  }
  finally
  {
   if(session!=null)
   {
    session.close();
   }
  }
  return tag;
 }

 //修改用户
 public boolean updateAccount(Account account){
  boolean tag=false;
  Session session=null;
  Transaction tc=null;
  try{
   session=HibernateSessionFactory.getSession();
   tc=session.beginTransaction();
   session.update(account);
   tc.commit();
  }catch(Exception e){
   e.printStackTrace();
  }
  finally
  {
   if(session!=null)
   {
    session.close();
   }
  }
  return tag;
 }

 //删除用户
 public boolean deleteAccount(String userName){
  boolean tag=false;
  Session session=null;
  Transaction tc=null;
  Account Account=new Account();
  try{
   session=HibernateSessionFactory.getSession();
   tc=session.beginTransaction();
   Account =(com.my.jkp.hibernate.Account)session.load(com.my.jkp.hibernate.Account.class,userName );   

   session.delete(Account);
   tc.commit();
  }catch(Exception e){
   e.printStackTrace();
  }
  finally
  {
   if(session!=null)
   {
    session.close();
   }
  }
  return tag;
 }