admindaoimp.java

学校的课程管理及选课系统

package org.wangsong.dao.imp;

import java.util.List;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.wangsong.dao.AdminDAO;
import org.wangsong.dao.hibernate.HibernateUtil;
import org.wangsong.domain.Admin;

public class AdminDAOImp implements AdminDAO
{

	public boolean deleteAdminByID(String id)
	{
		try
		{
        Session session=  HibernateUtil.currentSession();
		HibernateUtil.beginTransaction();
		Admin admin= (Admin)session.load(Admin.class, id);
		System.out.println(admin.getId());
		session.delete(admin);
		HibernateUtil.commitTransaction();
		HibernateUtil.closeSession();
		return true;
		}
		catch(HibernateException e)
		{
			e.printStackTrace();
		}
		return false;
	}

	public List getAdmin()
	{ 
		Session session=HibernateUtil.currentSession();
		HibernateUtil.beginTransaction();
		List results=(List) session.createQuery("from Admin as a ");
		HibernateUtil.commitTransaction();
		if(results!=null||results.size()>0)
		{
			return results;
		}
		return null;
	}

	public Admin getAdminByID(String id)
	{
        Session session=HibernateUtil.currentSession();
        HibernateUtil.beginTransaction();
        Admin admin=(Admin)session.get(Admin.class, id);
        
        HibernateUtil.commitTransaction();
        HibernateUtil.closeSession();
        if(admin!=null)
        	return admin;
		return null;
	}

	public boolean saveAdmin(Admin admin)
	{
		try{
        Session session=HibernateUtil.currentSession();
        HibernateUtil.beginTransaction();
        session.save(admin);
        HibernateUtil.commitTransaction();
        HibernateUtil.closeSession();
		return true;
		}catch(Exception e)
		{
			e.printStackTrace();
		}
		return false;
	}

	public boolean updateAdmin(Admin admin)
	{
		try{
	        Session session=HibernateUtil.currentSession();
	        HibernateUtil.beginTransaction();
	        session.update(admin);
	        HibernateUtil.commitTransaction();
	        HibernateUtil.closeSession();
			return true;
			}catch(Exception e)
			{
				e.printStackTrace();
			}
			return false;
	}

}