go語言json轉map

package util

import (
	"encoding/json"
	"fmt"
)
// json轉map函數，通用
func JSONToMap(str string) map[string]interface{} {

	var tempMap map[string]interface{}

	err := json.Unmarshal([]byte(str), &tempMap)

	if err != nil {
		panic(err)
	}

	return tempMap
}

• 如果map中含有數組，並且數組中是數字，需要求和，如何去做

rain = "{\"reqTime\":\"201911141554\",\"startTime\":\"201911141555\",\"endTime\":\"201911141755\",\"series\":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.07,0.14,0.32,0.51,0.72,0.92,1.11,1.28,1.41,1.5,1.53,1.5,1.41,1.28,1.11,0.92,0.72,0.51,0.32,0.14,0.07,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0],\"amendNow\":\"多雲\",\"amendNowwen\":\"Cloudy\",\"amendNowwcode\":\"01\",\"msg\":\"1小時后會有雪，出門記得帶傘\"}"
	fmt.Println(rain)
	// Json轉map，  map[string]interface{}
	rainMap := util.JSONToMap(rain)    // 
	// 降雨量之和
	sum := 0.00
	// 遍歷map中的series數組，降雨量相加
	for _, num := range rainMap["series"].([]interface{}) {
		sum += num.(float64) // 這里使用斷言
	}
        fmt.Println(sum)   // 結果為 17.490000000000002

• 如果是多層的json，請參考我的另一篇博客：
  (json后的)多層map取值

• 另外感謝網友解決了我的問題：https://www.golangtc.com/t/5628a59fb09ecc56ca000165