hibernate入门篇之新增功能_2：one-to-one

回应vilico，foreign 是sql的术语，就是foreign key，一般如果牵涉到2张表的话，就要有foreign key作为对应。
比如说，如果您有student+address这2个资料，如果没有一个key把这2个东西接在一起，请问如何知道这个学生是这个地址，那个地址又是另外一个学生？
另外一个我就不会了。

能不能说一下在one2one情况下使用Lazy的用法,我试过很多次都不行.

各位老兄，我是Hibernate新手，照着帖子做的程序有两个问题：
1.         帖子中InputStream stream = Example.class.getResourceAsStream("hibernate.properties");
找不到hibernate.properties，我换成FileInputStream stream = new FileInputStream("hibernate.properties");
就ok了？
2.        在one －to －one 中，我运行后在两个表（person，author）中哥插入了一条记录，但是在author表中person字段却是空的？？

我用的数据库是mysql ，谢谢！

怎样调试这个代码？

用这种方式创建的一对一的关系，在删除的时候为什么不能级连删除

/**
 * @author kiki
 *
 * date 2004-3-26
 * company www.pansky.com.cn
 */
package com.javamodel.hibernate;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import net.sf.hibernate.HibernateException;
import net.sf.hibernate.MappingException;
import net.sf.hibernate.Query;
import net.sf.hibernate.Session;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.Transaction;
import net.sf.hibernate.cfg.Configuration;
import net.sf.hibernate.tool.hbm2ddl.SchemaExport;


public class Example {
	private static SessionFactory _sessions=null;
	private static Properties pops=new Properties();;
	static{
		try{
			InputStream stream=Example.class.getResourceAsStream
			("hibernate.properties");;
			try{
				pops.load(stream);;
			}catch(IOException e1);{
				e1.printStackTrace();;
			}
			Configuration cfg=new Configuration();;
			cfg.addClass(Person.class);;
			cfg.addClass(Author.class);;
			cfg.setProperties(pops);;
			//new SchemaExport(cfg);.create(true,true);;
			_sessions=cfg.buildSessionFactory();;
		}catch(MappingException e);{
			e.printStackTrace();;
		}catch(HibernateException e);{
			e.printStackTrace();;
		}
	}
	public static void main(String[] args);throws HibernateException{
		Person person=new Person();;
		//person.setName("HengfeiDo");;
		//person.setEmail("smallduzi@sohu.com");;
		
		Author author=new Author();;
		//author.setAlias("smallduzi");;
		//author.setPerson(person);;
		
		Session session=_sessions.openSession();;
		Transaction tx=null;
		try{
			tx=session.beginTransaction();;
			Query query=session.createQuery("from Person as person where person.id=:id");;
			query.setString("id","5d8f3210fb8a972c00fb8a9758970001");;
			person=(Person);query.list();.get(0);;
			person.setName(person.getName();+"老大");;
			author.setPerson(person);;
			//System.out.println(person.getId();+":"+person.getName();+":"+person.getEmail(););;
			session.save(author);;
			//session.delete(author);;
			tx.commit();;
		}catch(HibernateException he);{
			if(tx!=null);tx.rollback();;
			throw he;
		}
		finally{
			session.close();;
		}
	}
}

错误信息

net.sf.hibernate.JDBCException: Could not execute JDBC batch update
	at net.sf.hibernate.impl.BatcherImpl.executeBatch(BatcherImpl.java:129);
	at net.sf.hibernate.impl.SessionImpl.executeAll(SessionImpl.java:2385);
	at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2335);
	at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2204);
	at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61);
	at com.javamodel.hibernate.Example.main(Example.java:68);
Caused by: java.sql.BatchUpdateException: ORA-00001: 违反唯一约束条件 (SYSTEM.SYS_C002552);

	at oracle.jdbc.dbaccess.DBError.throwBatchUpdateException(DBError.java:459);
	at oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:3907);
	at net.sf.hibernate.impl.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:54);
	at net.sf.hibernate.impl.BatcherImpl.executeBatch(BatcherImpl.java:122);
	... 5 more
Exception in thread "main" 

为什么？？？

信息: no JNDI name configured
java.lang.NoClassDefFoundError: javax/transaction/Synchronization
at net.sf.hibernate.impl.SessionFactoryImpl.openSession(SessionFactoryImpl.java:312)
at net.sf.hibernate.impl.SessionFactoryImpl.openSession(SessionFactoryImpl.java:325)
at net.sf.hibernate.impl.SessionFactoryImpl.openSession(SessionFactoryImpl.java:333)
at hiberante.Example.main(Example.java:50)
Exception in thread "main"

是为什么？？

To:kiki
原因就是主键冲突,因为你的person是取出来的,是有ID的,你有将它Insert,你想会不会出错.你要新NEW一个person才可以.
Person myPerson = new Person();
myPerson.setName(person.getName()+"老大");
author.setPerson(myPerson);

你这样不是更新，它又重新插入了一条记录

11:18:59,015 ERROR JDBCExceptionReporter:38 - could not insert: [com.javamodel.hibernate.Author#408283fafbc8201900fbc8201c790001]

com.jnetdirect.jsql.v: 对象名 'author' 无效。

晕啊，看了下，发现楼主的程序中没有建表，只好自己建了