teacherdao.java

jsp例程

package dao;

import hibernate.Teacher;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

public class TeacherDAO extends HibernateDaoSupport
{
	private Log log=LogFactory.getLog(TeacherDAO.class);
	public List isUserValid(String  name,String password)
	{
		try{
		String[] teacherlist=new String[2];
		teacherlist[0]=name;
		teacherlist[1]=password;
		List list=this.getHibernateTemplate().find("from  Teacher tea where tea.name=? and tea.password=?",teacherlist);
		return list;
		}catch(Exception e)
		{
			log.fatal(e);
			return null;
		}
	}
	public List getTeacher() 
	{
		try{
		List list=this.getHibernateTemplate().find("from Teacher tea");
		return list;
		}catch(Exception e)
		{
			return null;
		}
	}

	public boolean deleteTeacherByID(String id)
	{
		try{
		Teacher tea=(Teacher)this.getHibernateTemplate().load(Teacher.class,id);
		this.getHibernateTemplate().delete(tea);
		return true;
		}catch(Exception e)
		{
			return false;
		}
	}
	
	public Teacher getTeacherByID(String id)
	{
		try{
		Teacher tea=(Teacher)this.getHibernateTemplate().load(Teacher.class, id);
	    
		return tea;
		}catch(Exception e)
		{
			return null;
		}
		
	}
	
	public boolean updateTeacher(Teacher tea)
	{
		try{
			this.getHibernateTemplate().update(tea);
			return true;
		}catch(Exception e)
		{
			log.fatal(e);
			return false;
		}
	}
	
	public boolean saveTeacher(Teacher tea)
	{
		try{
		this.getHibernateTemplate().save(tea);
		return true;
		}catch(Exception e)
		{
			log.fatal(e);
			return false;
		}
	}
}