具有外键关系的Hibernate子类

Question

我需要一些帮助来定义Hibernate中的以下对象层次结构/数据库关系

从对象意义上来说 - Agent继承自Person，而Agency则继承自Organization。它们是从Party继承的，可以有多个与之关联的地址

数据库由

Agent
-ID
-Name
-PartyID (references Party.ID)

Agency
-ID
-Name
-PartyID (references Party.ID)

Address
-AddrID
-PartyID (references Party.ID)
-Street

Party.
-PartyID

Answer 1

这篇文章可以帮到你。包括src。

http://www.ibm.com/developerworks/java/library/j-hibernate/

社区页面

http://docs.jboss.org/hibernate/core/3.3/reference/en/html/inheritance.html

Answer 2

以下内容可能是一个开始

@Entity
public class Party {

  @Id
  private BigInteger partyID;

  private String name;

  @OneToMany(mappedBy="party")
  private Set<Address> addresses;

} 

@Entity
public class Organization extends Party {} 

@Entity
public class Person extends Party {} 

@Entity
public class Agency extends Organization {} 

@Entity
public class Agent extends Person {}

@Entity
public class Address{

  @Id
  private BigInteger addressID;

  @ManyToOne
  private Party party;

  private String street;
}