对方案一的hibernate实现，利用hibernate中的父子关系来解决

对方案一的hibernate实现，利用hibernate中的父子关系来解决：
java文件

Java代码

1. public class Party {   
2.     Long partyId;   
3.     String partyRole;   
4. }   
5. public class Person {   
6.     Long id;   
7.     Party party;   
8.     String login;   
9.     String name;   
10.     String sex;   
11.        ......   
12. }   
13. public class Department {   
14.     Long id;   
15.     Party party;   
16.     String name;   
17.     String address;   
18.     ......   
19. }   
20. public abstract class PartyRelationship {   
21.     Long id;   
22.     Party partyFrom;   
23.     Party partyTo;     
24.     String partyRole;          
25. }   
26. public class PersonRelationship extends PartyRelationship{}   
27. public class DepartmentRelationship extends PartyRelationship{}   
28. public class PersonDepartment extends PartyRelationship{}  

public class Party {Long partyId;String partyRole;}public class Person {Long id;Party party;String login;String name;String sex;       ......}public class Department {Long id;Party party;String name;String address;......}public abstract class PartyRelationship {Long id;Party partyFrom;Party partyTo;String partyRole;}public class PersonRelationship extends PartyRelationship{}public class DepartmentRelationship extends PartyRelationship{}public class PersonDepartment extends PartyRelationship{}

hbm.xml文件

Java代码

1. <hibernate-mapping package="com.bulain.model">   
2.     <class name="Party" table="party">   
3.         <id name="partyId" column="party_id" type="java.lang.Long" >   
4.             <generator class="native"/>   
5.         </id>   
6.         <property name="partyRole" column="party_role" type="java.lang.String"/>   
7.     </class>   
8.     <class name="Person" table="person">   
9.         <id name="id" column="id" unsaved-value="0">    
10.             <generator class="foreign">    
11.                 <param name="property">party</param>    
12.             </generator>    
13.         </id>    
14.         <one-to-one name="party" class="Party" cascade="all" constrained="true" />     
15.         <property name="login" column="login" type="java.lang.String"/>   
16.         <property name="name" column="name" type="java.lang.String"/>            
17.         <property name="sex" column="sex" type="java.lang.String"/>   
18.     </class>   
19.     <class name="Department" table="department">   
20.         <id name="id" column="id" unsaved-value="0">    
21.             <generator class="foreign">    
22.                 <param name="property">party</param>    
23.             </generator>    
24.         </id>    
25.         <one-to-one name="party" class="Party" cascade="all" constrained="true"/>     
26.         <property name="name" column="name" type="java.lang.String"/>   
27.         <property name="address" column="address" type="java.lang.String"/>   
28.     </class>   
29.     <class name="PartyRelationship" table="party_relationship" abstract="true">   
30.         <id name="id" column="id" type="java.lang.Long">   
31.             <generator class="native"/>   
32.         </id>   
33.         <discriminator column="party_role" type="java.lang.String"/>   
34.         <many-to-one name="partyFrom" column="party_from_id" not-null="true"/>   
35.         <many-to-one name="partyTo" column="party_to_id" not-null="true"/>   
36.         <subclass name="PersonRelationship" discriminator-value="per_per">   
37.             <property name="partyRole" column="party_role" insert="false"  
38.                 update="false"/>   
39.         </subclass>   
40.         <subclass name="PersonDepartment" discriminator-value="per_dept">   
41.             <property name="partyRole" column="party_role" insert="false"  
42.                 update="false"/>   
43.         </subclass>   
44.         <subclass name="DepartmentRelationship" discriminator-value="dept_dept">   
45.             <property name="partyRole" column="party_role" insert="false"  
46.                 update="false"/>   
47.         </subclass>   
48.     </class>   
49. </hibernate-mapping>  

<hibernate-mapping package="com.bulain.model"><class name="Party" table="party"><id name="partyId" column="party_id" type="java.lang.Long" ><generator class="native"/></id><property name="partyRole" column="party_role" type="java.lang.String"/></class><class name="Person" table="person"><id name="id" column="id" unsaved-value="0">             <generator class="foreign">                 <param name="property">party</param>             </generator>         </id> <one-to-one name="party" class="Party" cascade="all" constrained="true" />  <property name="login" column="login" type="java.lang.String"/><property name="name" column="name" type="java.lang.String"/><property name="sex" column="sex" type="java.lang.String"/></class><class name="Department" table="department"><id name="id" column="id" unsaved-value="0">             <generator class="foreign">                 <param name="property">party</param>             </generator>         </id> <one-to-one name="party" class="Party" cascade="all" constrained="true"/>  <property name="name" column="name" type="java.lang.String"/><property name="address" column="address" type="java.lang.String"/></class><class name="PartyRelationship" table="party_relationship" abstract="true"><id name="id" column="id" type="java.lang.Long"><generator class="native"/></id><discriminator column="party_role" type="java.lang.String"/><many-to-one name="partyFrom" column="party_from_id" not-null="true"/><many-to-one name="partyTo" column="party_to_id" not-null="true"/><subclass name="PersonRelationship" discriminator-value="per_per"><property name="partyRole" column="party_role" insert="false"update="false"/></subclass><subclass name="PersonDepartment" discriminator-value="per_dept"><property name="partyRole" column="party_role" insert="false"update="false"/></subclass><subclass name="DepartmentRelationship" discriminator-value="dept_dept"><property name="partyRole" column="party_role" insert="false"update="false"/></subclass></class></hibernate-mapping>

对于这个实现所以关系仍在party_relationship这张表中进行维护，通过PersonRelationship、DepartmentRelationship、PersonDepartment这三个子类进行维护。