• interface{}转换为int64

value.(int64)

• int切片转换为string类型，通过json编码

jL,err := json.Marshal(playerList)
	if err != nil{
		tlog.Error(err)
	}
	jsonList := string(jL)

• GO实现MAP的排序（转化为Struct）

func rankByWordCount(wordFrequencies map[int64]int64) pairList {
	pl := make(pairList, len(wordFrequencies))
	i := 0
	for k, v := range wordFrequencies {
		pl[i] = pair{k, v}
		i++
	}
	sort.Sort(sort.Reverse(pl))
	return pl
}

type pair struct {
	Key   int64
	Value int64
}
type pairList []pair

func (p pairList) Len() int           { return len(p) }
func (p pairList) Less(i, j int) bool { return p[i].Value < p[j].Value }
func (p pairList) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }