Golang 之 Base62 编码
Base62 编码用62个可见字符来编码信息,也就是所谓的62进制,可用于缩短地址之类的。实现起来也很简单。当然,这个实现跟别人家的有可能不一样,反正自己能编能解就行。
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 }
里面硬编码了 CODE_LENGTH 是不想每次去算一下长度,省点时间。