递归树形结构

例子：

public List<TbWxMenuDetail> buildMenuTree(List<TbWxMenuDetail> list) {
        List<TbWxMenuDetail> details = new ArrayList<>();
        // 构建一级节点
        for (TbWxMenuDetail detail : list) {
            if (detail.getMenuLevel() != null && detail.getMenuLevel() == 1) {
                details.add(detail);
            }
        }
        // 构建二级节点
        for (TbWxMenuDetail parent : details) {
            childTree(parent, list);
        }
        return details;
    }

    public TbWxMenuDetail childTree(TbWxMenuDetail parent,List<TbWxMenuDetail> list) {

        for (TbWxMenuDetail detail : list) {
            if (detail.getMenuLevel() != null && detail.getMenuLevel() == 1) {
                continue;
            }
            if (detail.getParentMenu().equals(parent.getId())) {
                detail = childTree(detail,list);
                parent.getChildList().add(detail);
            }
        }
        return parent;
    }