对于多对多的关联关系处理，一种方式是使用连接表来维持两者的多对多关联关系，也就是说除去两者在数据库中相应的数据表外，还会创建第三张表用来维护两者的多对多关联关系。

　　一。Husband

package com.orm.model; import java.util.List; /** * Created by IntelliJ IDEA. * User: Zhong Gang * Date: 10/18/11 * Time: 3:23 PM */ public class Husband extends DomainObject { private String name; private List<Wife> wifes; public Husband(String name, List<Wife> wifes) { this.name = name; this.wifes = wifes; } public Husband(String name) { this.name = name; } }

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping default-access="field"> <class name="com.orm.model.Husband" table="husband"> <id name="id" column="id" type="java.lang.Integer"> <generator class="native"/> </id> <property name="name" column="name" type="java.lang.String"/> <bag name="wifes" table="couple" cascade="all"> <key column="husbandid"/> <many-to-many column="wifeid" class="com.orm.model.Wife"/> </bag> </class> </hibernate-mapping>

　　二。Wife

package com.orm.model; import java.util.List; /** * Created by IntelliJ IDEA. * User: Zhong Gang * Date: 10/18/11 * Time: 3:23 PM */ public class Wife extends DomainObject{ private String name; private List<Husband> husbands; public Wife(String name) { this.name = name; } public Wife(String name, List<Husband> husbands) { this.name = name; this.husbands = husbands; } }

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping default-access="field"> <class name="com.orm.model.Wife" table="wife"> <id name="id" column="id" type="java.lang.Integer"> <generator class="native"/> </id> <property name="name" column="name" type="java.lang.String"/> <bag name="husbands" table="couple" cascade="all"> <key column="wifeid"/> <many-to-many column="husbandid" class="com.orm.model.Husband"/> </bag> </class> </hibernate-mapping>

　　三。测试代码

package com.orm; import com.orm.model.Husband; import com.orm.model.Wife; import com.orm.service.CoupleService; import junit.framework.TestCase; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import java.util.ArrayList; import java.util.List; /** * Created by IntelliJ IDEA. * User: Zhong Gang * Date: 10/18/11 * Time: 3:40 PM */ public class HibernateManyToManyTest extends TestCase { private CoupleService coupleService; @Override public void setUp() throws Exception { ApplicationContext context = new ClassPathXmlApplicationContext("classpath:testDataSource.xml"); coupleService = (CoupleService) context.getBean("coupleService"); } public void testManyToMany() throws Exception { Wife wife1 = new Wife("wife1"); Wife wife2 = new Wife("wife2"); Wife wife3 = new Wife("wife3"); List<Wife> wifes = new ArrayList<Wife>(); wifes.add(wife1); wifes.add(wife2); wifes.add(wife3); Husband husband = new Husband("husband", wifes); coupleService.saveOrUpdate(husband); Husband husband1 = new Husband("husband1"); Husband husband2 = new Husband("husband2"); Husband husband3 = new Husband("husband3"); List<Husband> husbands = new ArrayList<Husband>(); husbands.add(husband1); husbands.add(husband2); husbands.add(husband3); Wife wife = new Wife("wife", husbands); coupleService.saveOrUpdate(wife); } }  

　　测试结果及截图

　　附上源码以供参考