stest/public/data2.json

{
    "name": "中国",
    "children": [
    {
        "name": "浙江",
        "children": [
            {
                "name": "杭州"
            },
            {
                "name": "宁波"
            },
            {
                "name": "温州"
            },
            {
                "name": "绍兴"
            }
        ]
    },
    {
        "name": "广西",
        "children": [
            {
                "name": "桂林",
                "children": [
                    {
                        "name": "秀峰区"
                    },
                    {
                        "name": "叠彩区"
                    },
                    {
                        "name": "象山区"
                    },
                    {
                        "name": "七星区",
                        "children": [
                            {
                                "name": "哈尔滨"
                            },
                            {
                                "name": "齐齐哈尔"
                            },
                            {
                                "name": "牡丹江"
                            },
                            {
                                "name": "大庆"
                            }
                        ]
                    }
                ]
            },
            {
                "name": "南宁"
            },
            {
                "name": "柳州"
            },
            {
                "name": "防城港"
            }
        ]
    },
    {
        "name": "黑龙江",
        "children": [
            {
                "name": "哈尔滨"
            },
            {
                "name": "齐齐哈尔"
            },
            {
                "name": "牡丹江"
            },
            {
                "name": "大庆"
            }
        ]
    },
    {
        "name": "新疆",
        "children": [
            {
                "name": "乌鲁木齐"
            },
            {
                "name": "克拉玛依"
            },
            {
                "name": "吐鲁番"
            },
            {
                "name": "哈密"
            }
        ]
    }
]
}