建立树形结构

    //建立树形结构
    public List<BasicMenuInfoVo> buildTree() {
        List<BasicMenuInfoVo> treeMenus = new ArrayList<>();
        for (BasicMenuInfoVo menuNode : getRootNode()) {
            menuNode = buildChildTree(menuNode);
            treeMenus.add(menuNode);
        }
        return treeMenus;
    }


   //获取根节点
    private List<BasicMenuInfoVo> getRootNode() {
        List<BasicMenuInfoVo> rootMenuLists = new ArrayList<>();
        for (BasicMenuInfoVo menuNode : menuList) {
            if (menuNode.getParentId().longValue() == 0) {
                menuNode.setAccess(permissionMap.get(menuNode.getPermissionId()));
                if (flag == 0) rootMenuLists.add(menuNode);
                if (flag == 1 && menuNode.getState() == 1) rootMenuLists.add(menuNode);
            }
        }
        return rootMenuLists;
    }


    //递归，建立子树形结构
    private BasicMenuInfoVo buildChildTree(BasicMenuInfoVo pNode) {
        List<BasicMenuInfoVo> childMenus = new ArrayList<>();
        for (BasicMenuInfoVo menuNode : menuList) {
            if (menuNode.getParentId().longValue() == pNode.getId().longValue()) {
                menuNode.setAccess(permissionMap.get(menuNode.getPermissionId()));
                if (flag == 0) childMenus.add(buildChildTree(menuNode));
                if (flag == 1 && menuNode.getState() == 1) childMenus.add(buildChildTree(menuNode));
            }
        }
        pNode.setRoutes(childMenus);
        return pNode;
    }