package uni.one2many.jointable;import java.util.HashSet;
import java.util.Set;public class Emperor {private int id;private String name;private Set<Minister> ministers = new HashSet<Minister>();public Emperor() {}public Emperor(int id, String name, Set<Minister> ministers) {super();this.id = id;this.name = name;this.ministers = ministers;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Set<Minister> getMinisters() {return ministers;}public void setMinisters(Set<Minister> ministers) {this.ministers = ministers;}}package uni.one2many.jointable;public class Minister {private int id;private String name;public Minister() {}public Minister(int id, String name) {super();this.id = id;this.name = name;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}}

<hibernate-mapping><class name="uni.one2many.jointable.Emperor"><id name="id" column="did"><generator class="native" /></id><property name="name" type="string" column="name"></property><!-- confirure the uniredirection association --><set name="ministers" table="emperorminister" ><key column="did" not-null="true"></key><many-to-many column="mid" unique="true" class="uni.one2many.jointable.Minister"/></set></class></hibernate-mapping>
<hibernate-mapping><class name="uni.one2many.jointable.Minister"><id name="id" column="did"><generator class="native" /></id><property name="name" type="string" column="name"></property></class></hibernate-mapping>

public class Test {@org.junit.Testpublic void testAdd() {SessionFactory sf = HibernateUtil.getSessionFactory();Session session = sf.getCurrentSession();session.beginTransaction();Minister m1 = new Minister();m1.setName("廉颇");Minister m2 = new Minister();m2.setName("蔺相如");Emperor emperor = new Emperor();emperor.setName("齐威王");emperor.getMinisters().add(m1);emperor.getMinisters().add(m2);session.save(emperor);session.save(m1);session.save(m2);session.beginTransaction().commit();}
}

Hibernate: insert into Emperor (name) values (?)
Hibernate: insert into Minister (name) values (?)
Hibernate: insert into Minister (name) values (?)
Hibernate: insert into emperorminister (did, mid) values (?, ?)
Hibernate: insert into emperorminister (did, mid) values (?, ?)