manytoone.java

实现一些hibernate底层的东西

package com.bjsxt.hibernate;

import junit.framework.TestCase;

import org.hibernate.Session;

public class ManyToOne extends TestCase {
	
	public void testSave(){
		Session session = null;
		try{
			session = HibernateUtils.getSession();
			session.beginTransaction();
			
			Group group = new Group();
			group.setName( "Oristand" );
//			session.save( group );
			
			User user1 = new User();
			user1.setName( "steven" );
			user1.setGruop( group );
			
			User user2 = new User();
			user2.setName( "gavin" );
			user2.setGruop( group );
			
			session.save( user1 );
			session.save( user2 );
			
			session.getTransaction().commit();
		}catch( Exception e ){
			e.printStackTrace();
			session.getTransaction().rollback();
		}finally{
			HibernateUtils.closeSession(session);
		}
	}
	
	public void testSave2(){
		Session session = null;
		try{
			session = HibernateUtils.getSession();
			session.beginTransaction();
			
			User user = ( User )session.load( User.class , 8 );
			System.out.println( "user.name=" + user.getName() );
			System.out.println( "group.name=" + user.getGruop().getName() );
			
			session.getTransaction().commit();
		}catch( Exception e ){
			e.printStackTrace();
			session.getTransaction().rollback();
		}finally{
			HibernateUtils.closeSession(session);
		}
	}
}