通过一个父级id关系生成树

    public List<CatalogueAndPage> getAllCatalogueAndPage(String account){
        List<CatalogueAndPage> catalogueAndPageTreeList = new ArrayList<>();
        List<SysMenu> allSysAdminDISTINCTMenu = sysMenuRepository.findAllSysAdminDISTINCTMenu(account);

        for (SysMenu sysMenu:allSysAdminDISTINCTMenu) {
            if(Objects.isNull(sysMenu.getParentId())){
                CatalogueAndPage catalogueAndPage = new CatalogueAndPage();
                BeanUtils.copyProperties(sysMenu,catalogueAndPage);
//                catalogueAndPage.setId(sysMenu.getId());
                catalogueAndPageTreeList.add(catalogueAndPage);
            }else{
                //是不是儿子递归
                getChildren(catalogueAndPageTreeList,sysMenu);
            }
        }
        return catalogueAndPageTreeList;
    }
    public void  getChildren(List<CatalogueAndPage> catalogueAndPageTreeList ,SysMenu sysMenu){
        for (CatalogueAndPage node:catalogueAndPageTreeList) {
            if(node.getChildList() == null){
                node.setChildList(new ArrayList<>());
            }
            if(sysMenu.getParentId().equals(node.getId())){
                //是不是顶级的儿子
                CatalogueAndPage catalogueAndPage = new CatalogueAndPage();
                BeanUtils.copyProperties(sysMenu,catalogueAndPage);
                node.getChildList().add(catalogueAndPage);
            }else if(node.getChildList().size() > 0){
                //是不是顶级儿子的儿子
                getChildren(node.getChildList(), sysMenu);
            }
        }

    }