그것은 나를 위해 일한이 코드
public class Base64 {
private Base64() {
super();
}
/**
* Encode some data and return a String.
*/
public final static String encode(byte[] d) {
if (d == null)
return null;
byte data[] = new byte[d.length + 2];
System.arraycopy(d, 0, data, 0, d.length);
byte dest[] = new byte[(data.length/3) * 4];
// 3-byte to 4-byte conversion
for (int sidx = 0, didx = 0; sidx < d.length; sidx += 3, didx += 4) {
dest[didx] = (byte) ((data[sidx] >>> 2) & 077);
dest[didx + 1] = (byte) ((data[sidx + 1] >>> 4) & 017 | (data[sidx] << 4) & 077);
dest[didx + 2] = (byte) ((data[sidx + 2] >>> 6) & 003 | (data[sidx + 1] << 2) & 077);
dest[didx + 3] = (byte) (data[sidx + 2] & 077);
}
// 0-63 to ascii printable conversion
for (int idx = 0; idx < dest.length; idx++) {
if (dest[idx] < 26)
dest[idx] = (byte) (dest[idx] + 'A');
else if (dest[idx] < 52)
dest[idx] = (byte) (dest[idx] + 'a' - 26);
else if (dest[idx] < 62)
dest[idx] = (byte) (dest[idx] + '0' - 52);
else if (dest[idx] < 63)
dest[idx] = (byte) '+';
else
dest[idx] = (byte) '/';
}
// add padding
for (int idx = dest.length - 1; idx > (d.length * 4)/3; idx--) {
dest[idx] = (byte) '=';
}
return new String(dest);
}
/**
* Encode a String using Base64 using the default platform encoding
**/
public final static String encode(String s) {
return encode(s.getBytes());
}
/**
* Decode data and return bytes.
*/
public final static byte[] decode(String str) {
if (str == null)
return null;
byte data[] = str.getBytes();
return decode(data);
}
/**
* Decode data and return bytes. Assumes that the data passed in is ASCII
* text.
*/
public final static byte[] decode(byte[] data) {
int tail = data.length;
while (data[tail - 1] == '=')
tail--;
byte dest[] = new byte[tail - data.length/4];
// ascii printable to 0-63 conversion
for (int idx = 0; idx < data.length; idx++) {
if (data[idx] == '=')
data[idx] = 0;
else if (data[idx] == '/')
data[idx] = 63;
else if (data[idx] == '+')
data[idx] = 62;
else if (data[idx] >= '0' && data[idx] <= '9')
data[idx] = (byte) (data[idx] - ('0' - 52));
else if (data[idx] >= 'a' && data[idx] <= 'z')
data[idx] = (byte) (data[idx] - ('a' - 26));
else if (data[idx] >= 'A' && data[idx] <= 'Z')
data[idx] = (byte) (data[idx] - 'A');
}
// 4-byte to 3-byte conversion
int sidx, didx;
for (sidx = 0, didx = 0; didx < dest.length - 2; sidx += 4, didx += 3) {
dest[didx] = (byte) (((data[sidx] << 2) & 255) | ((data[sidx + 1] >>> 4) & 3));
dest[didx + 1] = (byte) (((data[sidx + 1] << 4) & 255) | ((data[sidx + 2] >>> 2) & 017));
dest[didx + 2] = (byte) (((data[sidx + 2] << 6) & 255) | (data[sidx + 3] & 077));
}
if (didx < dest.length) {
dest[didx] = (byte) (((data[sidx] << 2) & 255) | ((data[sidx + 1] >>> 4) & 3));
}
if (++didx < dest.length) {
dest[didx] = (byte) (((data[sidx + 1] << 4) & 255) | ((data[sidx + 2] >>> 2) & 017));
}
return dest;
}
을 시도
base64로 문자열 감지 코드를 제공하십시오 ... 코드 당신이 검출이없는 준 ??? – Developer