votedao.java

基于struts+hibernate的电子商务网站。可运行。数据库mysql

package tarena.dao;

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.criterion.Example;

import tarena.entity.Vote;

/**
 * Data access object (DAO) for domain model class Vote.
 * 
 * @see tarena.entity.Vote
 * @author MyEclipse Persistence Tools
 */

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

	// property constants
	public static final String MULTISELECT = "multiselect";

	public void save(Vote transientInstance) {
		log.debug("saving Vote instance");
		try {
			getSession().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

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

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

	public List findByExample(Vote instance) {
		log.debug("finding Vote instance by example");
		try {
			List results = getSession().createCriteria("tarena.entity.Vote")
					.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 Vote instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Vote 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 findByMultiselect(Object multiselect) {
		return findByProperty(MULTISELECT, multiselect);
	}

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

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

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

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