Hibernate的关联关系维护

Hibernate

one2many类型的关联关系的维护

<?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.layne.beans">
     <class name="Minister">
         <id name="mid">
              <generator class="native"></generator>     
         </id>
         <property name="mname"/>
         <!-- 关联属性映射 -->
         <many-to-one name="country" cascade="save-update"  
                class="Country" column="countryId" />
     </class>
     <class name="Country">
           <id name="cid">
              <generator class="native"></generator>
           </id>
           <property name="cname"/>
           <!-- 对关系关联映射关系 -->
           <set name="ministers" cascade="save-update" inverse="true">
              <key column="countryId"/>
              <one-to-many class="Minister"/>
           </set>
     </class>
   
</hibernate-mapping>