golang 使用时间通过md5生成token

package main

import (
"crypto/md5"
"fmt"
"io"
"strconv"
"time"
)

func main() {

crutime := time.Now().Unix()
fmt.Println("crutime-->", crutime)

h := md5.New()
fmt.Println("h-->", h)

fmt.Println("strconv.FormatInt(crutime, 10)-->", strconv.FormatInt(crutime, 10))
io.WriteString(h, strconv.FormatInt(crutime, 10))

fmt.Println("h-->", h)

token := fmt.Sprintf("%x", h.Sum(nil))
fmt.Println("token--->", token)

fmt.Println(len("8e1a188743c6077110da3c9778183031"))
}