hibernate one2one 唯一外键关联(双向关联)
hibernate的一对一唯一外键关联映射(双向关联 Person <------->IdCard)
一对一唯一外键关联采用<one - to -one>标签映射,必须指定标签中的property—ref = 属性为关系字段的名称。
如下:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" > <hibernate-mapping package="com.cnblogs.hibernate_first"> <class name="IdCard" table="t_idcard"> <id name="id" column="t_id"> <generator class="native"></generator> </id> <property name="cardNo" column="t_cardNo" length="30"/> <one-to-one name="person" property-ref="idCard"></one-to-one> </class> </hibernate-mapping>