coursebean.java

一个关于hibernate的实现例子

package com.hellking.study.hibernate;

import net.sf.hibernate.*;
import net.sf.hibernate.cfg.*;
import java.util.*;

/**
 *和course相关的业务逻辑
 */
public class CourseBean extends HibernateBase
{
	
	public CourseBean()throws HibernateException
	{
		super();
	}
	/**
	 *增加一个Course
	 */
	public void addCourse(Course st)throws HibernateException
	{
		 beginTransaction();
         session.save(st);         
         endTransaction(true);
    }
    
    /**
     *返回系统中所有的Course
     */
    public Iterator getAllCourses()throws HibernateException
    {
    	String queryString = "select courses from Course as courses";
        beginTransaction();
        Query query = session.createQuery(queryString);
        Iterator it= query.iterate();
        return it;
    }
    
    /**
     *删除给定ID的course
     */
    public void deleteCourse(String id)throws HibernateException
    {
    	beginTransaction();    	
    	Course course=(Course)session.load(Course.class,id);    	
    	session.delete(course);
    	endTransaction(true);
     }
    
    /**
     *按course的名字进行模糊查找
     */
    public Iterator getSomeCourse(String name)throws HibernateException
    {
      	String queryString = "select c from Course as c where c.name like :name" ;
        beginTransaction();
        Query query = session.createQuery(queryString);
         query.setString("name", "%"+name+"%");
        Iterator it= query.iterate();
        return it;
    }
    	
}