golang获取文件的md5

直接展示代码

func md5sum(filepath string) (string, error) {
	f, err := os.Open(filepath)
	if err != nil {
		str1 := "Open err"
		return str1, err
	}
	defer f.Close()

	body, err := ioutil.ReadAll(f)
	if err != nil {
		str2 := "ioutil.ReadAll"
		return str2, err
	}
	md5 := fmt.Sprintf("%x", md5.Sum(body))
	runtime.GC()
	return md5, nil
}