java.lang.ClassCastException:

package com.mySurvey.dao.impl;

import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.mySurvey.bean.User;
import com.mySurvey.dao.UserDAO;

public class UserDAOImpl extends HibernateDaoSupport implements UserDAO {

private SessionFactory sessionFactory;
String sql ="from User u where u.username=?";

public User Query(String name) {
// TODO Auto-generated method stub
User user =null;

if(this.getHibernateTemplate().find(sql, name)==null){
user = null;
}else{

user=(User)this.getHibernateTemplate().find(sql, name).get(0);

}

return user;
}

public void delete(User user) {
// TODO Auto-generated method stub
this.getHibernateTemplate().delete(user);

}

public void insert(User user) {
// TODO Auto-generated method stub
this.getHibernateTemplate().save(user);
}

public void update(User user) {
// TODO Auto-generated method stub
this.getHibernateTemplate().update(user);
}

}

因为红色的部分代码没有写get(0);结果出错，后来经检查，是list里面的user不能像单个的User对象转型