package com.gd.dao.impl;
import java.util.ArrayList;
import java.util.List;
import org.apache.log4j.Logger;
import org.hibernate.SessionFactory;
import com.gd.dao.UserDAO;
import com.gd.po.User;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
public class UserDAOimpl extends HibernateDaoSupport implements UserDAO{
	private Logger logger=Logger.getLogger(this.getClass().getName());
	//定義SessionFactory，負責對數據庫的連接
	private SessionFactory sessionFactory;
	//定義Hibennate的hql語句，用來根據用戶名查詢用戶
	private String hql="from User u where u.username=?";
	//創建用戶
	public void createUser(User user){
		this.getHibernateTemplate().save(user);
	}
	//修改用戶
	public void updateUser(User user){
		this.getHibernateTemplate().update(user);
	}
	//刪除用戶
	public void deleteUser(User user){
		this.getHibernateTemplate().delete(user);
	}
	//根據用戶名查詢用戶
	public User queryUser(String name){
		List userList;
		//假如查詢結果為空，則new一個新的用戶
		if(this.getHibernateTemplate().find(hql,name)==null){
			userList=new ArrayList();
			userList.add(new User());
		}else{
			userList=this.getHibernateTemplate().find(hql,name);
		}
		return (User)userList.get(0);
	}
	
	

}