userdaoimpl.java

网上调查系统主要有管理员指定调查

package com.myExam.dao.impl;
import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.myExam.bean.User;
import com.myExam.dao.UserDAO;
public class UserDAOImpl extends HibernateDaoSupport implements UserDAO{
	private SessionFactory sessionFactory;
	private String hql = "from User u where u.username = ?";
	//查询用户
    public User query(String name) {
    	User user = null;
    	//如果查询结果为空
		if (this.getHibernateTemplate().find(hql, name) == null ) {
			user = null;
		} else {
			//不为空时，取第一笔
			user = (User)(this.getHibernateTemplate().find(hql, name).get(0));
		}
		return user;
    }
	//新增用户
	public void insert(User user) {
		this.getHibernateTemplate().save(user);
	}
	//修改用户
	public void update(User user) {
		this.getHibernateTemplate().update(user);
	}
	//删除用户
	public void delete(User user) {
		this.getHibernateTemplate().delete(user);
	}
}