// 獲取需要封裝的數(shù)據(jù)
	List<Data> dataAll = service.findAll();
    if (CollUtil.isEmpty(dataAll)) {
      return new ArrayList<>();
    }
    // 獲取頂層目錄 項(xiàng)目中上級(jí)編碼為空則為一級(jí)目錄
    List<Data> parentList = dataAll.stream()
        .filter(item -> ObjectUtil.isEmpty(item.getParentNumber())).collect(Collectors.toList());

    // 獲取下級(jí)目錄，上級(jí)編碼不為空則非一級(jí)目錄
    List<Data> childList = dataAll.stream()
        .filter(item -> ObjectUtil.isNotEmpty(item.getParentNumber())).collect(Collectors.toList());

    // 封裝樹狀結(jié)構(gòu)
    return parentList.stream().map(item1 -> {
      Data chapterVo = new Data();
      BeanUtils.copyProperties(item1, chapterVo);
      List<Data> videoVoList = childList.stream()
          .filter(item2 -> item1.getBackgroundManagementCategoryNumber().equals(item2.getParentNumber()))
          .map(item3 -> {
            Data videoVo = new Data();
            BeanUtils.copyProperties(item3, videoVo);
            return videoVo;
          })
		  .collect(Collectors.toList());
      chapterVo.setChildren(videoVoList);
      return chapterVo;
    }).collect(Collectors.toList());

/**
* 使用遞歸方法建樹
* @param  menuTrees  子節(jié)點(diǎn)集合 / 返回的數(shù)據(jù)
* @return  List 
*/
public static List<Dept> buildByRecursive(List<Dept> menuTrees) {
    List<Dept> trees = new ArrayList<>();
    for (Dept menuTree : menuTrees) {
    	//查找根節(jié)點(diǎn)
        if (menuTree.getPcode() == null) {
         trees.add(findChildren(menuTree,menuTrees));
         }
    }
    return trees;
}

/**
 * 遞歸查找子節(jié)點(diǎn)
 * @param menuTree  菜單數(shù)對(duì)象
 * @param menuTrees  子節(jié)點(diǎn)
 * @return MenuTree
 */
private static Dept findChildren(Dept menuTree,List<Dept> menuTrees){
    for (Dept it : menuTrees) {
        if(menuTree.getCode().equals(it.getPcode())) {
            if (menuTree.getChildren() == null) {
             menuTree.setChildren(new ArrayList<>());
            }
            menuTree.getChildren().add(findChildren(it,menuTrees));
        }
    }
    return menuTree;
}