Here you can find the source of base64encode(byte[] bytes, boolean pad)
public static String base64encode(byte[] bytes, boolean pad)
//package com.java2s; /*/* ww w . j a v a 2 s. co m*/ * General utility routines * * Copyright (C) 2013, 2014 Per Lundqvist * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static String base64encode(byte[] bytes, boolean pad) { StringBuilder sb = new StringBuilder(); sb.append(javax.xml.bind.DatatypeConverter.printBase64Binary(bytes)); while (!pad && sb.charAt(sb.length() - 1) == '=') { sb.deleteCharAt(sb.length() - 1); } return sb.toString(); } }