branddao.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.Brand;

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

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

	// property constants
	public static final String EN_NAME = "enName";

	public static final String CN_NAME = "cnName";

	public static final String SMALL_PHOTO = "smallPhoto";

	public static final String BIG_PHOTO = "bigPhoto";

	public static final String DESCRIPTION = "description";

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

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

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

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

	public List findByCnName(Object cnName) {
		return findByProperty(CN_NAME, cnName);
	}

	public List findBySmallPhoto(Object smallPhoto) {
		return findByProperty(SMALL_PHOTO, smallPhoto);
	}

	public List findByBigPhoto(Object bigPhoto) {
		return findByProperty(BIG_PHOTO, bigPhoto);
	}

	public List findByDescription(Object description) {
		return findByProperty(DESCRIPTION, description);
	}

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

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

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

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