城市列表获取接口
=====================

获取城市列表
---------------------

::
  GET /city/

查询成功响应信息

::
  [
    {
        "city_name": "鞍山",
        "city_id": 2922,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "阿拉善盟",
        "city_id": 2923,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安庆",
        "city_id": 2924,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安阳",
        "city_id": 2925,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安顺",
        "city_id": 2926,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安康",
        "city_id": 2927,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "阿克苏",
        "city_id": 2928,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安吉",
        "city_id": 2929,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安丘",
        "city_id": 2930,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安岳",
        "city_id": 2931,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安平",
        "city_id": 2932,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安溪",
        "city_id": 2933,
        "first_char": "A",
        "hot_city": 0
    },
    {
        "city_name": "安宁",
        "city_id": 2934,
        "first_char": "A",
        "hot_city": 0
    },
    .........
  ]

总计800余城市，在此略去

响应参数说明

============== ======== ================   
name            type     value
============== ======== ================
city_name      string   城市名称
city_id        int      城市id
first_char     string   城市首字母
hot_city       bool     热门城市标识
============== ======== ================