111 lines
2.8 KiB
Go
111 lines
2.8 KiB
Go
package utils
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/rand"
|
|
"fmt"
|
|
"math/big"
|
|
)
|
|
|
|
// Random
|
|
// @description: 随机数工具接口
|
|
type Random interface {
|
|
GetRandomInt(len int) string // 获取指定长度的随机数字字符串
|
|
GetRandomString(len int) string // 生成随机字符串
|
|
GetRandomStringLower(len int) string // 生成小写随机字符串
|
|
GetRandomStringMini(len int) string // 获取去掉了iI0O1的随机字符串
|
|
GetRandomNumber(min, max int) int // 获取指定范围内的一个随机数
|
|
}
|
|
|
|
type random struct{}
|
|
|
|
// RandomUtils
|
|
// @description: 随机数工具
|
|
// @return Random
|
|
func RandomUtils() Random {
|
|
return &random{}
|
|
}
|
|
|
|
// GetRandomInt
|
|
// @description: 获取指定长度的随机数字字符串
|
|
// @receiver random
|
|
// @param len
|
|
// @return string
|
|
func (random) GetRandomInt(len int) string {
|
|
var numbers = []byte{0, 1, 2, 3, 4, 5, 7, 8, 9}
|
|
var container string
|
|
length := bytes.NewReader(numbers).Len()
|
|
|
|
for i := 1; i <= len; i++ {
|
|
rd, _ := rand.Int(rand.Reader, big.NewInt(int64(length)))
|
|
container += fmt.Sprintf("%d", numbers[rd.Int64()])
|
|
}
|
|
return container
|
|
}
|
|
|
|
// GetRandomString
|
|
// @description: 生成随机字符串
|
|
// @receiver random
|
|
// @param len
|
|
// @return string
|
|
func (random) GetRandomString(len int) string {
|
|
var container string
|
|
var str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
|
|
b := bytes.NewBufferString(str)
|
|
length := b.Len()
|
|
bigInt := big.NewInt(int64(length))
|
|
for i := 0; i < len; i++ {
|
|
randomInt, _ := rand.Int(rand.Reader, bigInt)
|
|
container += string(str[randomInt.Int64()])
|
|
}
|
|
return container
|
|
}
|
|
|
|
// GetRandomStringLower
|
|
// @description: 生成小写的随机字符串
|
|
// @receiver r
|
|
// @param len
|
|
// @return string
|
|
func (r random) GetRandomStringLower(len int) string {
|
|
var container string
|
|
var str = "abcdefghijklmnopqrstuvwxyz1234567890"
|
|
b := bytes.NewBufferString(str)
|
|
length := b.Len()
|
|
bigInt := big.NewInt(int64(length))
|
|
for i := 0; i < len; i++ {
|
|
randomInt, _ := rand.Int(rand.Reader, bigInt)
|
|
container += string(str[randomInt.Int64()])
|
|
}
|
|
return container
|
|
}
|
|
|
|
// GetRandomStringMini
|
|
// @description: 获取去掉了iI0O1的随机字符串
|
|
// @receiver random
|
|
// @param len
|
|
// @return string
|
|
func (random) GetRandomStringMini(len int) string {
|
|
var container string
|
|
var str = "abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ23456789"
|
|
b := bytes.NewBufferString(str)
|
|
length := b.Len()
|
|
bigInt := big.NewInt(int64(length))
|
|
for i := 0; i < len; i++ {
|
|
randomInt, _ := rand.Int(rand.Reader, bigInt)
|
|
container += string(str[randomInt.Int64()])
|
|
}
|
|
return container
|
|
}
|
|
|
|
// GetRandomNumber
|
|
// @description: 获取指定范围内的一个随机数
|
|
// @receiver random
|
|
// @param min
|
|
// @param max
|
|
// @return int
|
|
func (random) GetRandomNumber(min, max int) int {
|
|
en, _ := rand.Int(rand.Reader, big.NewInt(int64(max-min)))
|
|
rn := int(en.Int64()) + min
|
|
return rn
|
|
}
|