github.com/fastwego/offiaccount@v1.0.1/util/randstring.go (about) 1 // Copyright 2020 FastWeGo 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package util 16 17 import ( 18 "math/rand" 19 "time" 20 ) 21 22 const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" 23 24 // GetRandStringWithCharset 获取指定字符集 下 指定长度的随机字符串 25 func GetRandStringWithCharset(length int, charset string) string { 26 seededRand := rand.New(rand.NewSource(time.Now().UnixNano())) 27 28 b := make([]byte, length) 29 for i := range b { 30 b[i] = charset[seededRand.Intn(len(charset))] 31 } 32 return string(b) 33 } 34 35 // GetRandString 获取指定长度的随机字符串 36 func GetRandString(length int) string { 37 return GetRandStringWithCharset(length, charset) 38 }