go语言生成token值

func main() {
	c :=RandString(256)
	fmt.Println(c)

}
//生成token值
func RandString(length int) string {
	rand.Seed(time.Now().UnixNano())
	rs := make([]string, length)
	for start := 0; start < length; start++ {
		t := rand.Intn(3)
		if t == 0 {
			rs = append(rs, strconv.Itoa(rand.Intn(10)))
		} else if t == 1 {
			rs = append(rs, string(rand.Intn(26)+65))
		} else {
			rs = append(rs, string(rand.Intn(26)+97))
		}
	}
	return strings.Join(rs, "")
}