messagedao.java

C2C购物网站 含有数据库 解压后readme.txt里有详细说明

package com.shop;

import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Example;

/**
 * Data access object (DAO) for domain model class Message.
 * 
 * @see com.shop.Message
 * @author MyEclipse Persistence Tools
 */

public class MessageDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(MessageDAO.class);

	// property constants
	public static final String MID = "mid";

	public static final String CONTENT = "content";

	public static final String ADDTIME = "addtime";

	public void save(Message message) {
		Session session=HibernateSessionFactory.getSession();
		Transaction tx=session.beginTransaction();		
		session.save(message);
		tx.commit();
		HibernateSessionFactory.closeSession();
	}

	public void delete(Message persistentInstance) {
		log.debug("deleting Message instance");
		try {
			getSession().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Message findById(java.lang.Integer id) {
		log.debug("getting Message instance with id: " + id);
		try {
			Message instance = (Message) getSession().get("com.shop.Message",
					id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Message instance) {
		log.debug("finding Message instance by example");
		try {
			List results = getSession().createCriteria("com.shop.Message").add(
					Example.create(instance)).list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Message instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Message as model where model."
					+ propertyName + "= ?";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByMid(Object mid) {
		return findByProperty(MID, mid);
	}

	public List findByContent(Object content) {
		return findByProperty(CONTENT, content);
	}

	public List findByAddtime(Object addtime) {
		return findByProperty(ADDTIME, addtime);
	}

	public List findAll() {
		log.debug("finding all Message instances");
		try {
			String queryString = "from Message";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public Message merge(Message detachedInstance) {
		log.debug("merging Message instance");
		try {
			Message result = (Message) getSession().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Message instance) {
		log.debug("attaching dirty Message instance");
		try {
			getSession().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Message instance) {
		log.debug("attaching clean Message instance");
		try {
			getSession().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}
}