one-to-one,共享主键

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping 
   package="com.liucy.ebank.biz.entity">
  <class name="Account" table="t_account">
  	<id name="oid" column="OID">
  		<generator class="seqhilo">
  		</generator>
  	</id>
  	<property name="actNo"
  			  column="ACTNO" not-null="true" unique="true"></property>
  	<property name="bal"
  			  column="BALANCE" not-null="true"></property>
  	<one-to-one name="user"
  				  cascade="all"></one-to-one>
  </class>
</hibernate-mapping>


<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping 
   package="com.liucy.ebank.biz.entity">
  <class name="User" table="t_user">
  	<id name="oid" column="OID">
  		<generator class="foreign">
  			<param name="property">act</param>
  		</generator>
  	</id>
  	<property name="uid"
  			  column="USERID"
  			  unique="true"
  			  not-null="true"></property>
  	<property name="name"
  			  column="NAME"
  			  not-null="true"></property>
  	<one-to-one
  			   name="act"
  			   cascade="all"
  			   constrained="true"></one-to-one>
  </class>
</hibernate-mapping>