递归设置树节点

• 使用递归的方法设置节点

//所有的节点
    private List<CatalogNode> buildChildrenList(List<CatalogNode> catalogList) {
        List<CatalogNode> nodeList = catalogList.stream().filter(catalogNode -> StringUtils.isBlank(catalogNode.getPid()))
                .map(catalogNode -> {
                    catalogNode.setChildren(getChildren(catalogNode, catalogList));
                    return catalogNode;
                })
                .collect(Collectors.toList());
        return nodeList;
    }

    private List<CatalogNode> getChildren(CatalogNode root, List<CatalogNode> all) {
        List<CatalogNode> children = all.stream().filter(catalogNode -> {
                    if(StringUtils.isNotBlank(catalogNode.getPid())) {
                        catalogNode.setAttributes(new Attribute("seq", catalogNode.getCatalogSeq()));
                        return catalogNode.getPid().equals(root.getId());
                    }
                    return false;
                }
        ).map((menu) -> {
            menu.setChildren(getChildren(menu, all));
            return menu;
        }).collect(Collectors.toList());
        return children;
    }