class Base64Class
rem Const
dim sBASE_64_CHARACTERS‘转化码
dim lenString ‘计算字符串的长度
dim iCount ‘计数器
dim returnValue ‘返回值
dim tempChar‘缓存字符
dim tempString‘缓存字符串
dim paramString ‘参数字符串
dim temHex‘缓存缓存十六进制
dim tempLow‘缓存低位
dim tempHigh‘缓存高位
dim mod3String‘
dim mod4String‘
dim tempBinary‘
dim tempByteOne‘
dim tempByteTwo‘
dim tempByteThree‘
dim tempByteFour‘
dim tempSaveBitsOne‘
dim tempSaveBitsTwo‘
‘********************************************
‘begin初始化类
‘********************************************
private sub Class_Initialize()
sBASE_64_CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" end sub ‘********************************************
‘end初始化类‘
******************************************** ‘********************************************
‘begin销毁类
‘********************************************
Private Sub Class_Terminate()
sBASE_64_CHARACTERS="" end sub
‘********************************************
‘end销毁类
‘********************************************
‘********************************************
‘begin将Ansi编码的字符串进行Base64编码
‘********************************************
public function Encode(paramString)
tempString=""
returnValue=""
lenString=len(paramString)
if lenString<1 then
Encode=returnValue
else
mod3String=lenString mod 3
‘补足位数是为了便于计算
if mod3String>0 then
lenString=lenString+3-mod3String
lenString=lenString-3
end if
