basehibernatedao.java

一个ssh的网上购物系统

package com.xfaccp.bookonline.hib.dao.base;

import java.io.Serializable;

import org.hibernate.LockMode;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.xfaccp.bookonline.hib.dto.base.IBaseHibernateDTO;
import com.xfaccp.bookonline.hib.util.HibernateSessionFactory;

/**
 * Data access object (DAO) for domain model
 * 
 * @author MyEclipse - Hibernate Tools
 */
public class BaseHibernateDAO implements IBaseHibernateDAO {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	public Session getSession() {
		return HibernateSessionFactory.getSession();
	}

	public boolean save(IBaseHibernateDTO transientInstance) {
		Session session = this.getSession();
		Transaction tx = null;
		try {
			tx = session.beginTransaction();
			Serializable se = session.save(transientInstance);
			tx.commit();
			if (se != null) {
				return true;
			}
		} catch (Exception re) {
			if (tx != null)
				tx.rollback();
			re.printStackTrace();
			return false;
		}
		return false;
	}

	public void delete(IBaseHibernateDTO persistentInstance) {
		Session session = this.getSession();
		Transaction tx = null;
		try {
			tx = session.beginTransaction();
			session.delete(persistentInstance);
			tx.commit();
		} catch (Exception re) {
			if (tx != null) {
				tx.rollback();
			}
			re.printStackTrace();
		}
	}

	public IBaseHibernateDTO merge(IBaseHibernateDTO detachedInstance) {

		try {
			IBaseHibernateDTO result = (IBaseHibernateDTO) getSession().merge(
					detachedInstance);

			return result;
		} catch (RuntimeException re) {

			throw re;
		}
	}

	public void attachDirty(IBaseHibernateDTO instance) {

		try {
			getSession().saveOrUpdate(instance);

		} catch (RuntimeException re) {

			throw re;
		}
	}

	public void attachClean(IBaseHibernateDTO instance) {

		try {
			getSession().lock(instance, LockMode.NONE);

		} catch (RuntimeException re) {

			throw re;
		}
	}
}