tradesdaoimpl.java

来自「论坛软件系统亦称电子公告板(BBS)系统」· Java 代码 · 共 92 行

package cn.jsprun.dao.impl;

import java.util.List;

import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import cn.jsprun.dao.TradesDao;
import cn.jsprun.domain.Trades;
import cn.jsprun.utils.HibernateUtil;

public class TradesDaoImpl implements TradesDao {
	public List<Trades> findTradesByHql(String hql) {
		Session session = HibernateUtil.getSessionFactory().getCurrentSession();
		Transaction tr = null;
		try{
			tr = session.beginTransaction();
			Query query = session.createQuery(hql);
			List<Trades> list = query.list();
			tr.commit();
			return list;
		}catch(HibernateException e){
			if (tr != null) {
				tr.rollback();
			}
			e.printStackTrace();
		}
		return null;
	}
	public List<Trades> findTradesByHql(String hql, int start, int max) {
		Session session = HibernateUtil.getSessionFactory().getCurrentSession();
		Transaction tr = null;
		try{
			tr = session.beginTransaction();
			Query query = session.createQuery(hql);
			query.setFirstResult(start);
			query.setMaxResults(max);
			List<Trades> list = query.list();
			tr.commit();
			return list;
		}catch(HibernateException e){
			if (tr != null) {
				tr.rollback();
			}
			e.printStackTrace();
		}
		return null;
	}
	public Trades findTradesByPid(int pid) {
		Session session = HibernateUtil.getSessionFactory().getCurrentSession();
		Transaction tr = null;
		try{
			tr = session.beginTransaction();
			Query query = session.createQuery("from Trades as t where t.id.pid=?");
			query.setParameter(0, pid);
			List<Trades> list = query.list();
			tr.commit();
			if(list!=null && list.size()>0){
				return list.get(0);
			}
		}catch(HibernateException e){
			if (tr != null) {
				tr.rollback();
			}
			e.printStackTrace();
		}
		return null;
	}
	public int fidTradesCountbyHql(String hql) {
		Session session = HibernateUtil.getSessionFactory().getCurrentSession();
		Transaction tr = null;
		try{
			tr = session.beginTransaction();
			Query query = session.createQuery(hql);
			List list = query.list();
			tr.commit();
			if(list!=null && list.size()>0){
				return (Integer)list.get(0);
			}
		}catch(HibernateException e){
			if (tr != null) {
				tr.rollback();
			}
			e.printStackTrace();
		}
		return 0;
	}

}