machinedao.java

此源程序为我用struts+hibernate做的基础信息录入页面.包括对数据库的增删改查等操作.

package cl.test.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.Transaction;
import org.hibernate.criterion.Example;

/**
 * Data access object (DAO) for domain model class Machine.
 * 
 * @see cl.test.dao.Machine
 * @author MyEclipse Persistence Tools
 */

public class MachineDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(MachineDAO.class);
	// property constants
	public static final String NAME = "name";
	public static final String MANUM = "manum";
	public static final String POSI = "posi";
	public static final String VAL = "val";
	public static final String NUMS = "nums";

	public void save(Machine transientInstance) {
		Transaction tr =  getSession().beginTransaction();
		log.debug("saving Machine instance");
		try {
			getSession().save(transientInstance);
			tr.commit();
			getSession().close();
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			tr.rollback();
			throw re;
		}
	}

	public void update(Machine transientInstance) {
		log.debug("saving Machine instance");
		try {
			getSession().update(transientInstance);
			getSession().beginTransaction().commit();
			getSession().close();
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}
	
	public void delete(Machine persistentInstance) {
		log.debug("deleting Machine instance");
		try {
			getSession().delete(persistentInstance);
			getSession().beginTransaction().commit();
			getSession().close();
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Machine findById(java.lang.Long id) {
		log.debug("getting Machine instance with id: " + id);
		try {
			Machine instance = (Machine) getSession().get(
					"cl.test.dao.Machine", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Machine instance) {
		log.debug("finding Machine instance by example");
		try {
			List results = getSession().createCriteria("cl.test.dao.Machine")
					.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 Machine instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Machine 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 findByName(Object name) {
		return findByProperty(NAME, name);
	}

	public List findByManum(Object manum) {
		return findByProperty(MANUM, manum);
	}

	public List findByPosi(Object posi) {
		return findByProperty(POSI, posi);
	}

	public List findByVal(Object val) {
		return findByProperty(VAL, val);
	}

	public List findByNums(Object nums) {
		return findByProperty(NUMS, nums);
	}

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

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

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

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