tfiledaoimpl.java

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package com.dao;
import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.model.TFile;
import com.sun.org.apache.commons.logging.Log;
import com.sun.org.apache.commons.logging.LogFactory;


public class TFileDAOImpl extends HibernateDaoSupport implements TFileDAO{
	private static final Log log = LogFactory.getLog(TFileDAOImpl.class);
	// property constants

	public TFile getById(int id) {
		return (TFile)getHibernateTemplate().get(TFile.class, id);
	}
		
	public void save(TFile transientInstance) {
		log.debug("saving TFile instance");
		try {
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void deleteById(int id) {
		log.debug("deleting TFile instance");
		try {
			getHibernateTemplate().delete(getById(id));
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public TFile findById(int id) {
		log.debug("getting TFile instance with id: " + id);
		try {
			TFile instance = (TFile) getHibernateTemplate().get(TFile.class,id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

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

	/** 
	* 取记录总数 
	* @return int 
	*/ 
	public int getFilesCount() { 
	log.debug("getting file count:"); 
	int count = 0; 
	//注意：此TFile为对象不是表。 
	String queryString = "select count(*) from TFile"; 
	try { 
	count = ((Integer) getHibernateTemplate().iterate(queryString).next()).intValue(); 
	return count; 
	} catch (RuntimeException re) { 
	log.error("get failed", re); 
	throw re; 
	} 
	} 
}