我試圖通過將數據存儲在某些結構（機場+坐標）中來從 json 響應中獲取數據，但我不知道如何處理它，因為我對地圖和界面不夠好。代碼沒有顯示任何錯誤，但 MapofAirports 完全是空的，代碼如下：package mainimport (? ? //"api/client"? ? //"api/client/clienterrors"? ? //"api/client/openstreetmap"? ? "encoding/json"? ? "fmt"? ? "io/ioutil"? ? "log"? ? "math"? ? "net/http"? ? "os"? ? "strconv"? ? "strings")type Coordinates struct {? ? Longitude string `json:"lon"`? ? Latitude? string `json:"lat"`}type Airport struct {? ? Co? ? ? ?Coordinates `json:"location"`? ? IATACode string? ? ? `json:"id"`? ? Distance float64? ? ?`json:"distance"` // distance to coordinates in kilometer}func GetCoordinatesFromURL(url string) (float64, float64) {? ? parts := strings.Split(url, "=")? ? lat0 := strings.Split(parts[2], "&")? ? lon0 := strings.Split(parts[3], "&")? ? lat1, _ := strconv.ParseFloat(lat0[0], 64)? ? lon1, _ := strconv.ParseFloat(lon0[0], 64)? ? return lat1, lon1}func CalcDistance(lat1 float64, long1 float64, lat2 float64, long2 float64) float64 {? ? var latitude1 = lat1 * math.Pi / 180? ? var latitude2 = lat2 * math.Pi / 180? ? var longitude1 = long1 * math.Pi / 180? ? var longitude2 = long2 * math.Pi / 180? ? var R = 6371.0? ? var d = R * math.Acos(math.Cos(latitude1)*math.Cos(latitude2)*math.Cos(longitude2-longitude1)+math.Sin(latitude1)*math.Sin(latitude2))? ? return d}func main() {? ? var Locations []Airport? ? Locations = make([]Airport, 0)? ? var url = fmt.Sprintf("https://api.skypicker.com/locations?type=radius&lat=40.730610&lon=-73.935242&radius=250&location_types=airport&limit=3&sort=id&active_only=true")? ? UrlLat, UrlLon := GetCoordinatesFromURL(url)? ? resp, err := http.Get(url)? ? if err != nil {? ? ? ? panic(err.Error())? ? }我正在這樣處理：{ locations[],meta,last_refresh,results_retrieved } ==> location : { id , location + distance(calculated with a function) }
1 回答
慕沐林林
TA貢獻2016條經驗 獲得超9個贊
這是我的最后一次更新，在運行程序時，它在解組步驟中出現恐慌
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"math"
"net/http"
"strconv"
"strings"
)
type Coordinates struct {
Longitude string `json:"lon"`
Latitude string `json:"lat"`
}
type Airport struct {
Co Coordinates `json:"location"`
IATACode string `json:"id"`
Distance float64 `json:"distance"` // distance to coordinates in kilometer
}
type Response struct {
Locations []Airport `json:"locations"`
// add all the other fields you care about
}
func GetCoordinatesFromURL(url string) (float64, float64) {
parts := strings.Split(url, "=")
lat0 := strings.Split(parts[2], "&")
lon0 := strings.Split(parts[3], "&")
lat1, _ := strconv.ParseFloat(lat0[0], 64)
lon1, _ := strconv.ParseFloat(lon0[0], 64)
return lat1, lon1
}
func CalcDistance(lat1 float64, long1 float64, lat2 float64, long2 float64) float64 {
var latitude1 = lat1 * math.Pi / 180
var latitude2 = lat2 * math.Pi / 180
var longitude1 = long1 * math.Pi / 180
var longitude2 = long2 * math.Pi / 180
var R = 6371.0
var d = R * math.Acos(math.Cos(latitude1)*math.Cos(latitude2)*math.Cos(longitude2-longitude1)+math.Sin(latitude1)*math.Sin(latitude2))
return d
}
func main() {
var url = fmt.Sprintf("https://api.skypicker.com/locations?type=radius&lat=40.730610&lon=-73.935242&radius=250&location_types=airport&limit=3&sort=id&active_only=true")
UrlLat, UrlLon := GetCoordinatesFromURL(url)
resp, err := http.Get(url)
if err != nil {
panic(err.Error())
}
defer resp.Body.Close()
data, err := ioutil.ReadAll(resp.Body)
res := &Response{}
if err := json.Unmarshal(data, res); err != nil {
panic(err)
}
fmt.Println(res.Locations)
for i, item := range res.Locations {
latt,_ := strconv.ParseFloat(item.Co.Latitude, 64)
lonn,_ :=strconv.ParseFloat(item.Co.Longitude, 64)
res.Locations[i].Distance = CalcDistance(latt,lonn , UrlLat, UrlLon)
}
fmt.Println("after calculate distance")
fmt.Println(res.Locations)
}
這有什么問題嗎？
- 1 回答
- 0 關注
- 100 瀏覽
添加回答
舉報
0/150
提交
取消