Here you can find the source of base64Encode(String plaintext)
private static String base64Encode(String plaintext)
//package com.java2s; /*/*from w w w. jav a 2s. c om*/ * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import sun.misc.BASE64Encoder; import java.io.UnsupportedEncodingException; public class Main { private static final String CHAR_SET = "UTF-8"; private static String base64Encode(String plaintext) { try { return new BASE64Encoder().encode(plaintext.getBytes(CHAR_SET)) .replace("\r\n", "").replace("\n", ""); } catch (UnsupportedEncodingException e) { return new BASE64Encoder().encode(plaintext.getBytes()) .replace("\r\n", "").replace("\n", ""); } } }