为什么账号密码跟数据库的数据都一样但是显示密码错误，控制台没有报错误，也生成了sql语句

dao层的主要代码：

public class EmployeeDaoImpl implements EmployeeDao {

private SessionFactory sessionFactory;

public void setSessionFactory(SessionFactory sessionFactory) {

this.sessionFactory = sessionFactory;

}

@Override

public Employee findByUsAndPw(Employee employee) {

// TODO Auto-generated method stub

String hql="from Employee where username=? and password=?";

Session session=sessionFactory.getCurrentSession();

Transaction tx=session.beginTransaction();

Query query=session.createQuery(hql);

query.setParameter(0, employee.getUsername());

query.setParameter(1, employee.getPassword());

List <Employee> list=query.list();

/*

* 这里存在Hibernate版本的问题   抽时间弄

* 

*/

tx.commit();

if(list.size()>0){

return list.get(0);

}

return null;

}

}