t2一对一，主键引用

<?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> <class name="com.tudou.hibernates.entity1.Account" table="tb_account"> <id name="user_id" type="java.lang.Integer" column="user_id"> <generator class="native" /> </id> <property name="userName"></property> <property name="password"></property> <property name="isAct"></property> <one-to-one name="address" class="com.tudou.hibernates.entity1.Address" property-ref="account"> </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> <class name="com.tudou.hibernates.entity1.Address" table="tb_address"> <id name="address_id" type="java.lang.Integer" column="address_id"> <generator class="native"> </generator> </id> <many-to-one name="account" unique="true" class="com.tudou.hibernates.entity1.Account" fetch="select"> <column name="user_id"></column> </many-to-one> <property name="addressName" /> <property name="postZip"></property> <property name="tel"></property> </class> </hibernate-mapping>