高德地图API使用（根据地址查经纬度，计算二个坐标之间的距离）

高德地图API使用（根据地址查经纬度，计算二个坐标之间的距离）   根据地址查经纬度： https://restapi.amap.com/v3/geocode/geo?address=广西壮族自治区南宁市西乡塘区衡阳西路34号&output=JSON&key=38f05ba13d4324325 返回：

{
  "status": "1",
  "info": "OK",
  "infocode": "10000",
  "count": "1",
  "geocodes": [
    {
      "formatted_address": "广西壮族自治区南宁市西乡塘区衡阳西路34号",
      "country": "中国",
      "province": "广西壮族自治区",
      "citycode": "0771",
      "city": "南宁市",
      "district": "西乡塘区",
      "township": [],
      "neighborhood": {
        "name": [],
        "type": []
      },
      "building": {
        "name": [],
        "type": []
      },
      "adcode": "450107",
      "street": "衡阳西路",
      "number": "34号",
      "location": "108.304040,22.830050",
      "level": "门址"
    }
  ]
}

{
  "status": "1",
  "info": "OK",
  "infocode": "10000",
  "count": "1",
  "results": [
    {
      "origin_id": "1",
      "dest_id": "1",
      "distance": "6447",
      "duration": "1194"
    }
  ]
}