coursedao.java

jsp例程

package dao;

import hibernate.Classes;
import hibernate.Course;
import hibernate.Enrol;
import hibernate.Student;

import java.util.Iterator;
import java.util.List;
import java.util.Set;

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

public class CourseDAO extends HibernateDaoSupport {
	private Log log=LogFactory.getLog(CourseDAO.class);
	public List getCourse()
	{
		try{
			List list=this.getHibernateTemplate().find("from Course cour");
			return list;
		}catch(Exception e)
		{
			log.fatal(e);
			return null;
		}
		
		
	}
	public boolean deleteCourseByID(String id)
	{
		try{
		Course course=(Course)this.getHibernateTemplate().load(Course.class, id);
		this.getHibernateTemplate().delete(course);
		return true;
		}catch(Exception e)
		{
			log.fatal(e);
			return false;
		}
	}
	public Course getCourseByID(String id)
	{
		try{
		Course course=(Course)this.getHibernateTemplate().load(Course.class,id);
		
		return course;
		}catch(Exception e)
		{
			log.fatal(e);
			return null;
		}
		
	}
	
	public boolean saveCourse(Course cour)
	{
		try{
		this.getHibernateTemplate().save(cour);
		return true;
		}catch(Exception e)
		{
			log.fatal(e);
			return false;
		}
	}
	public boolean updateCourse(Course cour)
	{
		try{
			this.getHibernateTemplate().update(cour);
			return true;
			}catch(Exception e)
			{
				log.fatal(e);
				return false;
			}
	}
	public List getCourseForStu(String stu_id)
	{
		Long id=Long.parseLong(stu_id);
		Student student=(Student)this.getHibernateTemplate().load(Student.class,id);
		Set set=student.getEnrols();
		Iterator it=set.iterator();
		while(it.hasNext())
		{
			Enrol enrol=(Enrol)it.next();
			Classes cla=enrol.getClasses();
			
		}
		return null;
		
	}
	

}