hibernate基础-自关联映射

1 class Node:

private int id;
private String name;
private Node parent;//交节点
private Set children;//子节点

2 Node.hbm.xml:

<class name="node" class="com.my.hibernate.Node">
        <id name="id">
                <generator class="native"/>
        </id>
        <property name="name"/>
        <many-to-one name="parent" column="pid"/>
        <set name="children" lazy="false" inverse="true"  cascade="all">
                <key column="pid"/>
                <one-to-many class="com.my.hibernate.Node"/>
        </set>
</class>