【文件属性】：
文件名称：全国省市区json数据，扁平树结构。
文件大小：1.68MB
文件格式：JSON
更新时间：2021-04-14 10:33:10
扁平树城市列表
全国省市区json数据，扁平树结构。通过districtCode和parentCode将父子级关系串联起来。
示例片段：
{
"id": "297",
"districtCode": "297",
"districtName": "武汉市",
"parentCode": "24",
"districtType": "3",
"postCode": "",
"zipCode": "",
"isValid": "1",
"createdBy": "1",
"createdTime": "1",
"updatedBy": "1",
"updatedTime": "1",
"deleted": "1"
},
{
"id": "298",
"districtCode": "298",
"districtName": "宜昌市",
"parentCode": "24",
"districtType": "3",
"postCode": "",
"zipCode": "",
"isValid": "1",
"createdBy": "1",
"createdTime": "1",
"updatedBy": "1",
"updatedTime": "1",
"deleted": "1"
},
......