Java Base64 base64enc(byte[] in)

Description

baseenc

License

LGPL

Declaration

public static String base64enc(byte[] in) 

Method Source Code

//package com.java2s;
/*/*ww  w. ja  va  2  s.  com*/
 *  This file is part of the Haven & Hearth game client.
 *  Copyright (C) 2009 Fredrik Tolf <fredrik@dolda2000.com>, and
 *                     Bj?rn Johannessen <johannessen.bjorn@gmail.com>
 *
 *  Redistribution and/or modification of this file is subject to the
 *  terms of the GNU Lesser General Public License, version 3, as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  Other parts of this source tree adhere to other copying
 *  rights. Please see the file `COPYING' in the root directory of the
 *  source tree for details.
 *
 *  A copy the GNU Lesser General Public License is distributed along
 *  with the source tree of which this file is a part in the file
 *  `doc/LPGL-3'. If it is missing for any reason, please see the Free
 *  Software Foundation's website at <http://www.fsf.org/>, or write
 *  to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 *  Boston, MA 02111-1307 USA
 */

public class Main {
    private final static String base64set = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    public static String base64enc(byte[] in) {
        StringBuilder buf = new StringBuilder();
        int p = 0;
        while (in.length - p >= 3) {
            buf.append(base64set.charAt((in[p + 0] & 0xfc) >> 2));
            buf.append(base64set.charAt(((in[p + 0] & 0x03) << 4) | ((in[p + 1] & 0xf0) >> 4)));
            buf.append(base64set.charAt(((in[p + 1] & 0x0f) << 2) | ((in[p + 2] & 0xc0) >> 6)));
            buf.append(base64set.charAt(in[p + 2] & 0x3f));
            p += 3;
        }
        if (in.length == p + 1) {
            buf.append(base64set.charAt((in[p + 0] & 0xfc) >> 2));
            buf.append(base64set.charAt((in[p + 0] & 0x03) << 4));
            buf.append("==");
        } else if (in.length == p + 2) {
            buf.append(base64set.charAt((in[p + 0] & 0xfc) >> 2));
            buf.append(base64set.charAt(((in[p + 0] & 0x03) << 4) | ((in[p + 1] & 0xf0) >> 4)));
            buf.append(base64set.charAt((in[p + 1] & 0x0f) << 2));
            buf.append("=");
        }
        return (buf.toString());
    }
}

Related

1. base64(String value)
2. base64Append(StringBuilder sb, int digit, boolean haveNonZero)
3. base64Append(StringBuilder sb, int digit, boolean haveNonZero)
4. base64Character(int number)
5. base64CharToValue(byte c)
6. base64Pad(String s)
7. base64ReadChunk(InputStream in, byte[] chunk)
8. base64ToBits(char data)
9. base64ToByteArray(String s)