enterprise/base/util/util.go

package util

import (
	"math/rand"
	"time"
)

func RandomStr(length int) string {
	str := "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
	bytes := []byte(str)
	result := []byte{}
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	for i := 0; i < length; i++ {
		result = append(result, bytes[r.Intn(len(bytes))])
	}
	return string(result)
}

func CutTail(str string, length int) string {
	if len(str) <= length {
		return str
	}

	return str[0:length]
}