Golang 之 Base62 编码

cdchenli

package main　　

　　
import (
　　

"math"　　
"strings"
　　
)
　　

　　
const CODE62  = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
　　
const CODE_LENTH = 62
　　
var EDOC = map[string]int{"0":0,"1":1,"2":2,"3":3,"4":4,"5":5,"6":6,"7":7,"8":8,"9":9,"a":10,"b":11,"c":12,"d":13,"e":14,"f":15,"g":16,"h":17,"i":18,"j":19,"k":20,"l":21,"m":22,"n":23,"o":24,"p":25,"q":26,"r":27,"s":28,"t":29,"u":30,"v":31,"w":32,"x":33,"y":34,"z":35,"A":36,"B":37,"C":38,"D":39,"E":40,"F":41,"G":42,"H":43,"I":44,"J":45,"K":46,"L":47,"M":48,"N":49,"O":50,"P":51,"Q":52,"R":53,"S":54,"T":55,"U":56,"V":57,"W":58,"X":59,"Y":60,"Z":61, }
　　

　　
/**
　　
* 编码 整数 为 base62 字符串
　　
*/
　　
func Encode(number int) string {
　　
if number == 0 {
　　
return "0"
　　
}
　　
result := make([]byte , 0)
　　
for number > 0 {
　　
round  := number / CODE_LENTH
　　
remain := number % CODE_LENTH
　　
result = append(result,CODE62[remain])
　　
number  = round
　　
}
　　
return string(result)
　　
}
　　

　　

　　
/**
　　
* 解码字符串为整数
　　
*/
　　
func Decode(str string) int {
　　
str = strings.TrimSpace(str)
　　
var result int = 0
　　
for index,char := range []byte(str){
　　
result +=  EDOC[string(char)] * int(math.Pow(CODE_LENTH,float64(index)))
　　
}
　　
return result
　　
}