go 生成随机字符串

func GetRandomString(l int) string {

 str := "0123456789abcdefghijklmnopqrstuvwxyz"

 bytes := []byte(str)

 result := []byte{}

 r := rand.New(rand.NewSource(time.Now().UnixNano()))

 for i := 0; i \< l; i++ {

 result = append(result, bytes[r.Intn(len(bytes))])

 }

 return string(result)

}