Hibernate多对一单向关联映射

     Hibernate多对一单向关联映射 

1、AddressTwo.hbm.xml

<? 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 >
   < class  name ="com.persistent.AddressTwo"  table ="address" >   
     < id  name ="id"  column ="addressId"  unsaved-value ="0" >
         < generator  class ="increment" >
         </ generator >
     </ id >     
     < property  name ="addressName"  column ="addressName" ></ property >     
     < many-to-one  name ="peopleTwo"  
                 column ="peopleId"  
                 class ="com.persistent.PeopleTwo"
                 cascade ="all"
                  >
     </ many-to-one >     
   </ class >   
</ hibernate-mapping >

2、PeopleTwo.hbm.xml

< hibernate-mapping   default-lazy ="false" >   
    < class  name ="com.persistent.PeopleTwo"  table ="people" >      
      < id  name ="id"  column ="peopleId"  unsaved-value ="0" >     
         < generator  class ="increment" >         
         </ generator >     
      </ id >      
      < property  name ="name"  column ="name" ></ property >           
    </ class >
</ hibernate-mapping >

3、PeopleTwo.java和AddressTwo.java

public   class  PeopleTwo  ... {    
    private long id;
    private String name;
    …
}
public   class  AddressTwo  ... {    
    private long id;
    private PeopleTwo peopleTwo;
    private String addressName;
…
}

4、测试程序

Session session  =  HibernateSessionFactory.getSession();
session.beginTransaction();
List result  =  session.createQuery( " from AddressTwo " ).list();
session.getTransaction().commit();
for ( int  i  =   0 ; i < result.size(); i ++ ) ... {
       AddressTwo addressTwo = (AddressTwo)result.get(i);
       System.out.println(addressTwo.getId()+"    "

                                            +addressTwo.getAddressName()+"    "

                                            +addressTwo.getPeopleTwo().getId()+"     "

                                            +addressTwo.getPeopleTwo().getName()
                                        );
}