递归

	public  static List<CmsDepartment> getListForSelect(List<CmsDepartment> topList) {
		List<CmsDepartment> list = new ArrayList<CmsDepartment>();
		for (CmsDepartment c : topList) {
			addChildToList(list, c);
		}
		return list;
	}
	
	/**
	 * 递归将子部门加入列表
	 * 
	 * @param list
	 *            部门容器
	 * @param depart
	 *            待添加的部门，且递归添加子部门
	 */
	private static void addChildToList(List<CmsDepartment> list, CmsDepartment depart) {
		list.add(depart);
		Set<CmsDepartment> child = depart.getChild();
		for (CmsDepartment c : child) {
			addChildToList(list, c);
		}
	}

//获取getChild数据库配置

<many-to-one name="parent" column="parent_id" class="CmsDepartment" not-null="false"></many-to-one>
		<set name="child" inverse="true" cascade="delete">
			<cache usage="read-write"/>
			<key column="parent_id"/>
			<one-to-many class="CmsDepartment"/>
</set>