Go语言学习日记【二十】将json格式字符串转化为key=value格式

package main

import (
    "encoding/json"
    "fmt"
)


func main() {
    // 生成map格式字符串
    ma1 := make(map[string]interface{})
    ma2 := make(map[string]interface{})
    ma3 := make(map[string]interface{})
    ma4 := make(map[string]interface{})
    ma1["a1"] = ma2
    ma1["a2"] = 3
    ma1["a3"] = 4
    ma2["b1"] = 22
    ma2["b2"] = 33
    ma2["b3"] = []int{1,2,3}
    ma2["b4"] = ma3
    ma3["c1"] = 55
    ma3["c3"] = 88
    ma4["d1"] = 66
    ma4["d2"] = 77
    ma3["c2"] = ma4

    // 将map格式字符串转化为json
    mjson,_ :=json.Marshal(ma1)
    fmt.Println(string(mjson))
    fmt.Println("-----------------------------------")
    var k string
    var s string
    map3:= make(map[string]interface{})
    err := json.Unmarshal(mjson, &map3)
    if err != nil {
        fmt.Println(err)
    }
    s = jsonToKV(k,s,map3)
    fmt.Println(s)

}


func jsonToKV(key string,str string ,data interface{}) string  {
    _,ok := data.(map[string]interface{})
    if ok {
        for k,v := range data.(map[string]interface{}) {
            if len(key) > 0 {
                k = key + "." + k
            }
             _,ok = v.(map[string]interface{})
             if ok {
                 str =  jsonToKV(k,str,v)
             } else {
                   if len(str) == 0 {
                       str = str + k + "=" + fmt.Sprintf("%v",v)
                   } else {
                       str = str + " "+ k + "=" + fmt.Sprintf("%v",v)
                   }
             }
        }
    }
    return str
}