java实现遍历树形菜单方法——映射文件VoteTree.hbm.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    <class name="org.entity.VoteTree" table="VOTE_TREE" schema="VOTE">
        <id name="id" type="java.lang.Long">
            <column name="ID" precision="10" scale="0" />
            <generator class="assigned" />
        </id>
        <property name="text" type="java.lang.String">
            <column name="TEXT" length="30" not-null="true" />
        </property>
        <property name="pid" type="java.lang.Long">
            <column name="PID" precision="10" scale="0" />
        </property>
        <property name="levels" type="java.lang.Long">
            <column name="levels"/>
        </property>
      <!--   <list name="children" cascade="all">
          <key column="pid"/>
          <index column="id"/>
          <one-to-many class="org.entity.VoteTree"/>
        </list> -->
    </class>
</hibernate-mapping>