hibernate 单向、双向 一对一 关联

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快速搭建 HIBERNATE，以便测试
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person - address

public class Person implements java.io.Serializable {

	// Fields

	private Long id;
	private String name;
	private Long age;
	private Long addressId;

	private Address address ;

	------省略get/set方法

public class Address implements java.io.Serializable {

	// Fields

	private Long id;
	private String detail;

------省略get/set方法

	hibernate 配置 person
建表语句
		CREATE TABLE "SYSTEM"."PERSON"
		(	
	"ID" NUMBER(16,0) NOT NULL ENABLE,
	"NAME" VARCHAR2(20),
	"AGE" NUMBER(4,0),
	"ADDRESS_ID" NUMBER(16,0) NOT NULL ENABLE,
	 PRIMARY KEY ("ID")
	--------------------------
	CREATE TABLE "SYSTEM"."ADDRESS" 
   (	"ID" NUMBER(16,0) NOT NULL ENABLE, 
	"DETAIL" VARCHAR2(200), 
	 PRIMARY KEY ("ID")
	-----------------------

<hibernate-mapping>
    <class name="com.po.Person" table="PERSON">
        <id name="id" type="java.lang.Long">
            <column name="ID" precision="16" scale="0" />
            <generator class="sequence" />
        </id>
        <property name="name" type="java.lang.String">
            <column name="NAME" length="20" />
        </property>
        <property name="age" type="java.lang.Long">
            <column name="AGE" precision="4" scale="0" />
        </property>
        <property name="addressId" type="java.lang.Long">
            <column name="ADDRESS_ID" precision="16" scale="0" not-null="true" />
        </property>

        <many-to-one name="address" column="id" unique="true"></many-to-one>
        <!-- <one-to-one name="address"></one-to-one>  这么写也可以-->
    </class>
</hibernate-mapping>

--------------------------------
hibernate 配置 address

	<hibernate-mapping>
		<class name="com.po.Address" table="ADDRESS">
			<id name="id" type="java.lang.Long">
				<column name="ID" precision="16" scale="0" />
				<generator class="sequence" />
			</id>
			<property name="detail" type="java.lang.String">
				<column name="DETAIL" length="200" />
			</property>
		</class>
   </hibernate-mapping>


测试
----------------------------------
/**
 * Test.java
 * com.hib
 *
 * Function： TODO
 *
 *   ver     date      		author
 * ──────────────────────────────────
 *   		 Mar 31, 2010 		程仁银
 *
 * Copyright (c) 2010,  All Rights Reserved.
*/

package com.hib;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

import com.po.Address;
import com.po.Person;
import com.po.TbUsers;

/**
 * ClassName:Test
 * Project:
 * Company: LINKAGE
 *
 * @author   程仁银
 * @version
 * @since    Ver 1.1
 * @Date	 Mar 31, 2010		1:56:43 PM
 *
 * @see
 */
public class Test {

	/**@author . 程仁银
	 * @email  . [email protected]
	 * @createTime .Mar 31, 2010 1:56:44 PM
	 * @parameters .
	 * @description .
	 */
	public static void main(String[] args)
	{
		SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
		Session session = sessionFactory.openSession();
		Transaction tx = session.beginTransaction();
//		业务逻辑测试
		Query query=session.createQuery("from Person u");
		List<Person> list = query.list();
		for(Person person:list)
		{
			System.out.println("----------"+person.getName()+" "+person.getAddress().getId()+" "+person.getAddress().getDetail());
		}
		System.out.println("==");

		/*Query query=session.createQuery("from Address u");
		List<Address> list = query.list();
		for(Address p:list)
		{
			System.out.println(p.getId()+" "+p.getDetail());
		}
		System.out.println("==");*/

		tx.commit();
	}

}

双向关联 配置 简概如下：

public class Person implements java.io.Serializable {

	// Fields

	private Long id;
	private String name;
	private Long age;
	private Long addressId;

	private Address address ;
<many-to-one name="address" column="id" unique="true"></many-to-one>

----------------------------------------------------
private Long id;
	private String detail;
	private Person person;
<many-to-one name="person" column="id" unique="true" fetch="select"></many-to-one>
测试：
Query query=session.createQuery("from Address u");
		List<Address> list = query.list();
		for(Address p:list)
		{
			System.out.println(p.getId()+" "+p.getDetail()+" - "+p.getPerson().getName());
		}