tclasshwdao.java

持久层hibernate技术使用的一个例子

package cn.hope.front.pojo.dao;

import java.util.List;

import org.apache.log4j.Logger;

import net.sf.hibernate.HibernateException;
import cn.hope.front.pojo.TClassHw;
import cn.hope.front.pojo.base.BaseTClassHwDAO;


public class TClassHwDAO extends BaseTClassHwDAO {
	Logger log = Logger.getLogger(TClassHwDAO.class.getName());
	/**
	 * Default constructor.  Can be used in place of getInstance()
	 */
	public TClassHwDAO () {}

	/**************jinxl**************/
	/**
	 * 插入数据方法
	 * 
	 * @param tFile
	 * @return
	 * @throws HibernateException
	 */
	public Integer insert(TClassHw tClassHw) throws HibernateException {
		try {
			initialize();// 初始化session
			return (Integer) this.save(tClassHw);// 调用生成好的父类方法save(),返回被插入数据的主键
		} catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} finally {
			closeCurrentThreadSessions();// 关闭当前session
		}
	}
	
	public void modify(TClassHw tClassHw) throws HibernateException {
		try {
			initialize();
			this.update(tClassHw);
		} catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} finally {
			closeCurrentThreadSessions();
		}
	}
	
	public List searchAll() throws HibernateException {
		List list = null;
		String sqlStr = "select tClassHw from TClassHw tClassHw where tClassHw.flag='0' ";
		try {
			initialize();
			list = this.getSession().find(sqlStr);
		} catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} finally {
			closeCurrentThreadSessions();
		}
		return list;
	}

	public TClassHw searchByKey(Integer id) throws HibernateException {
		TClassHw tClassHw = null;
		String sqlStr = "select tClassHw from TClassHw tClassHw where tClassHw.flag='0' and tClassHw.id='"
				+ id + "'";
		try {
			initialize();
			List list = this.getSession().find(sqlStr);
			if (list.size() > 0) {
				tClassHw = (TClassHw) list.get(0);
			}
		} catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} finally {
			closeCurrentThreadSessions();
		}
		return tClassHw;
	}
	/*****************jinxl*******************/

}