10040e47a5ae001c1cf0ed8a423fa3fa

来自「《v512工作室_Java高端培训系列视频》(Java JSP Servlet 」· 代码 · 共 133 行

package com.v512.guestbook.model;

import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

/**
 * A data access object (DAO) providing persistence and search support for
 * Guestbook entities. Transaction control of the save(), update() and delete()
 * operations can directly support Spring container-managed transactions or they
 * can be augmented to handle user-managed Spring transactions. Each of these
 * methods provides additional information for how to configure it for the
 * desired type of transaction control.
 * 
 * @see com.v512.guestbook.model.Guestbook
 * @author MyEclipse Persistence Tools
 */

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

    protected void initDao() {
	// do nothing
    }

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

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

    public Guestbook findById(java.lang.Long id) {
	log.debug("getting Guestbook instance with id: " + id);
	try {
	    Guestbook instance = (Guestbook) getHibernateTemplate().get("com.v512.guestbook.model.Guestbook", id);
	    return instance;
	} catch (RuntimeException re) {
	    log.error("get failed", re);
	    throw re;
	}
    }

    public List findByExample(Guestbook instance) {
	log.debug("finding Guestbook instance by example");
	try {
	    List results = getHibernateTemplate().findByExample(instance);
	    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 Guestbook instance with property: " + propertyName + ", value: " + value);
	try {
	    String queryString = "from Guestbook as model where model." + propertyName + "= ?";
	    return getHibernateTemplate().find(queryString, value);
	} catch (RuntimeException re) {
	    log.error("find by property name failed", re);
	    throw re;
	}
    }

    public List findAll() {
	log.debug("finding all Guestbook instances");
	try {
	    String queryString = "from Guestbook";
	    return getHibernateTemplate().find(queryString);
	} catch (RuntimeException re) {
	    log.error("find all failed", re);
	    throw re;
	}
    }

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

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

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

    public static GuestbookDAO getFromApplicationContext(ApplicationContext ctx) {
	return (GuestbookDAO) ctx.getBean("GuestbookDAO");
    }
}