teacherdaoimp.java

学校管理系统 校园管理系统 struts+hibernate

package com.stuman.dao.imp;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.Session;

import com.stuman.dao.TeacherDAO;
import com.stuman.dao.hibernate.HibernateUtil;
import com.stuman.domain.Teacher;

public class TeacherDAOImp implements TeacherDAO {
  public static Log log = LogFactory.getLog(Teacher.class);
	public boolean deleteTeacherByID(String id) {
		// TODO 自动生成方法存根
		try {
			Session s = HibernateUtil.currentSession();
			HibernateUtil.beginTransaction();
			Teacher tea = (Teacher)s.load(Teacher.class,id);
			HibernateUtil.commitTransaction();
			HibernateUtil.beginTransaction();
			s.delete(tea);
			HibernateUtil.commitTransaction();
			HibernateUtil.closeSession();
			return true;
		} catch (HibernateException e) {
			// TODO 自动生成 catch 块
			log.fatal(e);
		}
		return false;
	}

	public List getTeacher() {
		// TODO 自动生成方法存根
		try {
			Session s = HibernateUtil.currentSession();
			HibernateUtil.beginTransaction();
			List results = s.createQuery("from Teacher tea").list();
			HibernateUtil.commitTransaction();
			HibernateUtil.closeSession();
			if(results != null&&results.size()>0){
				return results;
			}
			
		} catch (HibernateException e) {
			// TODO 自动生成 catch 块
			log.fatal(e);
		}
		return null;
	}

	public Teacher getTeacherByID(String id) {
		// TODO 自动生成方法存根
		try {
			Session s = HibernateUtil.currentSession();
			HibernateUtil.beginTransaction();
			Teacher tea = (Teacher)s.load(Teacher.class, id);
			HibernateUtil.commitTransaction();
			HibernateUtil.closeSession();
			return tea;
		} catch (HibernateException e) {
			// TODO 自动生成 catch 块
			log.fatal(e);
		}
		return null;
	}

	public boolean saveTeacher(Teacher tea) {
		// TODO 自动生成方法存根
		try {
			Session s = HibernateUtil.currentSession();
			HibernateUtil.beginTransaction();
			s.saveOrUpdate(tea);
			HibernateUtil.commitTransaction();
			HibernateUtil.closeSession();
			return true;
		} catch (HibernateException e) {
			// TODO 自动生成 catch 块
			log.fatal(e);
		}
		
		return false;
	}

	public boolean updateTeacher(Teacher tea) {
		// TODO 自动生成方法存根
		try {
			Session s = HibernateUtil.currentSession();
			HibernateUtil.beginTransaction();
			s.update(tea);
			HibernateUtil.commitTransaction();
			HibernateUtil.closeSession();
			return  true;
		} catch (HibernateException e) {
			// TODO 自动生成 catch 块
			log.fatal(e);
		}
		return false;
	}

}