Here you can find the source of longToBase64(long number)
public static String longToBase64(long number)
//package com.java2s; /**/*from w w w. j ava 2 s. co m*/ * Copyright (c) 2015 The original author or authors * <p> * Licensed 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 * <p> * http://www.apache.org/licenses/LICENSE-2.0 * <p> * 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 java.util.Base64; public class Main { public static String longToBase64(long number) { return Base64.getEncoder().encodeToString(longToBytes(number)); } public static byte[] longToBytes(long l) { byte[] result = new byte[8]; for (int i = 7; i >= 0; i--) { result[i] = (byte) (l & 0xFF); l >>= 8; } return result; } }