myauctiondaoimpl.java

Struts+Spring+Hibernate实现的在线拍卖系统,去掉了这些组件自身的jar包

package org.bestteam.dao.impl;

import java.util.List;

import org.bestteam.dao.MyAuctionDao;
import org.bestteam.domain.MyAuction;
import org.hibernate.LockMode;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

public class MyAuctionDaoImpl extends HibernateDaoSupport implements
		MyAuctionDao {
	
	/**
	 * 
	 * @param ApplicationContext 一个ApplicationContext的对象
	 * @return MyAuction的对象
	 * 在类加载时通过AplicationContext对象得到MyAuction的对象
	 */
	public static MyAuction getFromApplicationContext(ApplicationContext ctx) {
    	return (MyAuction) ctx.getBean("myAuctionDao");
	}

	public boolean attachClean(MyAuction instance) {
		try{
			getHibernateTemplate().lock(instance, LockMode.NONE);
		}catch(RuntimeException re) {
			re.printStackTrace();
			return false;
		}
		return true;
	}

	/**
	 * @param MyAuction 一个MyAuction的对象
	 * @return boolean
	 * 对传进来的MyAuction对象保存或更新
	 * 当该对象为一个托管对象时，该方法会执行更新动作
	 * 当对象为一个瞬时对象时，该方法会执行保存动作
	 */
	public boolean attachDirty(MyAuction instance) {
		try{
			getHibernateTemplate().saveOrUpdate(instance);
		}catch(RuntimeException re) {
			re.printStackTrace();
			return false;
		}
		return true;
	}

	public boolean delete(MyAuction persistentInstance) {
		try{
			getHibernateTemplate().delete(persistentInstance);
		}catch(RuntimeException re) {
			re.printStackTrace();
			return false;
		}
		return true;
	}

	/**
	 * @param Integer 用户的ID
	 * @return UserInfo的对象
	 * 根据该用户的用户ID(主键)，查找该用户发布的拍卖信息
	 * 如果用户ID不存在，则返回空值
	 */
	public MyAuction findMyAuctionByUserId(Integer userID) {
		MyAuction myAuction = null;
		try{
			myAuction = (MyAuction) getHibernateTemplate().get(MyAuction.class, userID);
		}catch(RuntimeException re) {
			re.printStackTrace();
		}
		return myAuction;
	}

	public List findMyAuctionListByExample(MyAuction instance) {
		List myAuctionList = null;
		try{
			myAuctionList = getHibernateTemplate().findByExample(instance);
		}catch(RuntimeException re) {
			re.printStackTrace();
		}
		return myAuctionList;
	}

	/**
	 * @param 	String 该类对象的一个属性的名称
	 * 			Object 该属性名所对应的对象的值
	 * @return List列表
	 * 根据类对象的一个属性的名称和其对应的值，查找该类对象的实例，
	 * 因为输入的属性不保证能唯一标识该对象，所以返回的对象将是一个由该类对象组成的List列表
	 */
	public List findMyAuctionListByProperty(String propertyName, Object value) {
		List myAuctionList = null;
		try{
			String queryString = "from MyAuction as myAuction where myAuction." 
												+ propertyName + "=?";
			myAuctionList = getHibernateTemplate().find(queryString, value);
		}catch(RuntimeException re) {
			re.printStackTrace();
		}
		return myAuctionList;
	}

	public MyAuction merge(MyAuction detachedInstance) {
		MyAuction myAuction = null;
		try{
			myAuction = (MyAuction) getHibernateTemplate().merge(detachedInstance);
		}catch(RuntimeException re) {
			re.printStackTrace();
		}
		return myAuction;
	}

	/**
	 * @param 	MyAuction MyAuction的对象
	 * @return boolean
	 * 将传入的MyAuction对象持久化
	 * 应注意传入的对象的id(在对象中应该保持该属性为Null)不能重复
	 */
	public boolean save(MyAuction transientInstance) {
		try{
			getHibernateTemplate().save(transientInstance);
		}catch(RuntimeException re) {
			re.printStackTrace();
			return false;
		}
		return true;
	}

}