Function GetRandomString

utils/function.go:87–96

GetRandomString 生成随机字符串

(num int)

//GetRandomString 生成随机字符串
func GetRandomString(num int) string {
	str := "123456789abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ"
	bytes := []byte(str)
	result := []byte{}
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	for i := 0; i < num; i++ {
		result = append(result, bytes[r.Intn(len(bytes))])
	}
	return string(result)
}

//CheckFileIsExist 判断文件是否存在  存在返回 true 不存在返回false
func CheckFileIsExist(filename string) bool {