id和code的转换(Base62)

版本加密解密的实现 package lib import ( "fmt" "strconv" ) func Id2Code(id int, version byte) string { var code string = "" if version == '1' { number := id for { remain := number % 10000000 str := Base62Encode(remain) code = str + code number = number / 10000000 if number == 0 { break } } code = string(version) + code } return code } func Code2Id(code string) int { version := code[0] code = code[1:] if version == '1' { var buffer string = "" for i := len(code); i > 0; i -= 4 { start := i - 4 if start < 0 { start = 0 } seg := code[start:i] segId := Base62Decode(seg) // 大于7位非法 if segId >= 100000000 { return 0 } buffer += fmt.Sprintf("%07d", Base62Decode(seg)) } result, _ := strconv.Atoi(buffer) return result } return 0 } Base62加密解密的实现 package lib import ( "math" "bytes" ) const dictLength = 62 var dict []byte = []byte{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'} func Base62Encode(id int) string { result := make([]byte, 0) number := id for number > 0 { round := number / dictLength remain := number % dictLength result = append([]byte{dict[remain]}, result...) number = round } return string(result) } func Base62Decode(code string) int { var result int = 0 codeLength := len(code) for i, c := range []byte(code) { result += bytes.IndexByte(dict, c) * int(math.Pow(dictLength, float64(codeLength - 1 - i))) } return result }