1. md5

package main

import (
    "crypto/md5"
    "encoding/hex"
    "fmt"
    "io"
)

func main() {
    str := "www.topgoer.com"

    //方法一
    data := []byte(str)
    has := md5.Sum(data)
    md5str1 := fmt.Sprintf("%x", has) //将[]byte转成16进制

    fmt.Println(md5str1)

    //方法二

    w := md5.New()
    io.WriteString(w, str) //将str写入到w中
    bw := w.Sum(nil)       //w.Sum(nil)将w的hash转成[]byte格式

    // md5str2 := fmt.Sprintf("%x", bw)    //将 bw 转成字符串
    md5str2 := hex.EncodeToString(bw) //将 bw 转成字符串
    fmt.Println(md5str2)
}

输出结果:

    df02d4af01fdbe9aa21f72acaf6b7cfa
    df02d4af01fdbe9aa21f72acaf6b7cfa

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