递归实现部门树结构获取-优快云博客

本文介绍如何通过递归方法获取组织结构中的部门树形列表，详细阐述了从数据源获取到层次分明的树状结构的过程。

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获取部门树列表

//用转换器将部门列表转换成部门树
  List<SysDepartmentTreeVo> list = SysDepartmentConvert.INSTANCE.listToTreeVoList(sysDepartmentList);
        List<SysDepartmentTreeVo> treeVos = new ArrayList<>();
        for (SysDepartmentTreeVo treeVo : list) {
            if (treeVo.getParentId() == null) {
                treeVos.add(findChildren(treeVo, list));
            }
        }
//查找子级（子级的子级....以此类推）
private SysDepartmentTreeVo findChildren(SysDepartmentTreeVo tree, List<SysDepartmentTreeVo> list) {
        for (SysDepartmentTreeVo vo : list) {
            if (tree.getId().equals(vo.getParentId())) {
                if (tree.getChildren() == null) {
                    tree.setChildren(new ArrayList<>());
                }
                tree.getChildren().add(findChildren(vo, list));
            }
        }
        return tree;
    }
/**以下是转换器类**/
@Mapper
public interface SysDepartmentConvert {

    SysDepartmentConvert INSTANCE = Mappers.getMapper(SysDepartmentConvert.class);

    /**
     * SysDepartment转换成SysDepartmentTreeVo对象
     *
     * @param sysDepartment
     * @return
     */
    SysDepartmentTreeVo entityToTreeVo(SysDepartment sysDepartment);

    /**
     * SysDepartment列表转换成SysDepartmentTreeVo列表
     *
     * @param list
     * @return
     */
    List<SysDepartmentTreeVo> listToTreeVoList(List<SysDepartment> list);

}