ok-admin/data/permission/tree.json

[
    {
        "title": "江西",
        "children": [
            {
                "title": "南昌",
                "children": [
                    {
                        "title": "高新区"
                    }
                ]
            }
        ]
    },
    {
        "title": "陕西",
        "children": [
            {
                "title": "西安"
            }
        ]
    }
]