read-json-file-to-struct

read json file to struct

package main

import (
    "encoding/json"
    "fmt"
    "io/ioutil"
    "log"
)

/*
@Time: 2019-06-20 15:41
@Desc:
*/

func main() {

    datas, err := ioutil.ReadFile("./citys4lbs.json")
    if err != nil {
        log.Fatal("err is:", err)
    }

    log.Println("datas is: ", string(datas), len(string(datas)))

    resp := new(Resp)
    errs := json.Unmarshal(datas, resp)

    if errs != nil {
        fmt.Println("json unmarshal err is :", errs)
    }

    fmt.Println("obj length:", len(resp.Result))
    if len(resp.Result) > 0 {
        result := resp.Result[0]
        fmt.Println(" first is :", result)
        fmt.Println(" city is :", result.City)
        fmt.Println(" province is :", result.Province)
        // code text
        cityMap := make(map[string]string)
        for _, v := range resp.Result {
            for _, city := range v.City {
                cityMap[city.Value] = city.Text
            }
            cityMap[v.Province.Value] = v.Province.Text
        }
        fmt.Println("len is :", len(cityMap))
        fmt.Println("map is :
", cityMap)
    }

}

type Resp struct {
    Result        []Result
    ResultCode    string `json:"resultCode"`
    ResultMessage string `json:"resultMessage"`
}

type Result struct {
    City     []Obj
    Province Obj
}

type Obj struct {
    Text  string
    Value string
}