麻烦帮我将下面这段变形的BASE64(非原型) JAVA版转为ASP版
public static String encode(byte data[])
{
return encode(data, 0, data.length);
}
public static String encode(byte data[], int off, int len)
{
if(len <= 0)
return "";
char out[] = new char[(len / 3) * 4 + 4];
int rindex = off;
int windex = 0;
int rest;
for(rest = len - off; rest >= 3; rest -= 3)
{
int i = ((data[rindex] & 0xff) << 16) + ((data[rindex + 1] & 0xff) << 8) + (data[rindex + 2] & 0xff);
out[windex++] = S_BASE64CHAR[i >> 18];
out[windex++] = S_BASE64CHAR[i >> 12 & 0x3f];
out[windex++] = S_BASE64CHAR[i >> 6 & 0x3f];
out[windex++] = S_BASE64CHAR[i & 0x3f];
rindex += 3;
}
if(rest == 1)
{
int i = data[rindex] & 0xff;
out[windex++] = S_BASE64CHAR[i >> 2];
out[windex++] = S_BASE64CHAR[i << 4 & 0x3f];
out[windex++] = '=';
out[windex++] = '=';
} else
if(rest == 2)
{
int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
out[windex++] = S_BASE64CHAR[i >> 10];
out[windex++] = S_BASE64CHAR[i >> 4 & 0x3f];
out[windex++] = S_BASE64CHAR[i << 2 & 0x3f];
out[windex++] = '=';
}
return new String(out, 0, windex);
}
private static final char S_BASE64CHAR[] = {
'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', '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', '+', '/'
};
private static final char S_BASE64PAD = 61;
private static final byte S_DECODETABLE[];