如何用Hibernate创建无主键表？

@Entity
@Table(name = "your_table_name")
public class YourEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    // Other fields and their getters/setters
}

<class name="com.example.YourEntity" table="your_table_name">
    <id name="id" column="id">
        <generator class="identity"/>
    </id>
    <!-- Other fields and their mappings -->
</class>

<hibernate-configuration>
    <session-factory>
        <!-- Other configuration properties -->
        <mapping resource="com/example/YourEntity.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
Session session = sessionFactory.openSession();

Transaction transaction = session.beginTransaction();

YourEntity entity = new YourEntity();
// Set values for entity fields

session.save(entity);

transaction.commit();

session.close();