golang生成指定位数的字符串(数字、大小写字母)
package main import( "fmt" "time" "math/rand" ) const ( KC_RAND_KIND_NUM = 0 // 纯数字 KC_RAND_KIND_LOWER = 1 // 小写字母 KC_RAND_KIND_UPPER = 2 // 大写字母 KC_RAND_KIND_ALL = 3 // 数字、大小写字母 ) // 随机字符串 func Krand(size int, kind int) []byte { ikind, kinds, result := kind, [][]int{[]int{10, 48}, []int{26, 97}, []int{26, 65}}, make([]byte, size) is_all := kind > 2 || kind < 0 rand.Seed(time.Now().UnixNano()) for i :=0; i < size; i++ { if is_all { // random ikind ikind = rand.Intn(3) } scope, base := kinds[ikind][0], kinds[ikind][1] result[i] = uint8(base+rand.Intn(scope)) } return result } func main(){ fmt.Println("num: " + string(Krand(16, KC_RAND_KIND_NUM))) fmt.Println("lower: " + string(Krand(16, KC_RAND_KIND_LOWER))) fmt.Println("upper: " + string(Krand(16, KC_RAND_KIND_UPPER))) fmt.Println("all: " + string(Krand(16, KC_RAND_KIND_ALL))) }
运行效果:
num: 1724754808278598
lower: rvuwvrmamuafuxpg
upper: RVUWVRMAMUAFUXPG
all: VWrA875Gg80U07GP
原文引自:https://www.oschina.net/code/snippet_170216_50650