将给定数量的字节转换为人工字节

/**

 *

 * jerry - Common Java Functionality

 * Copyright (c) 2012-2015, Sandeep Gupta

 * 

 * http://sangupta.com/projects/jerry

 * 

 * 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

 * 

 *       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 java.util.Arrays;
//时 代      J a v a   公   众 号 - nowjava.com 提 供

public class Main{

    public static void main(String[] argv) throws Exception{

        long bytes = 2;

        System.out.println(getReadableByteCount(bytes));

    }

    /**

     * Convert the given number of bytes to human-readable {@link String} format.

     * 

     * @param bytes

     * @return

     */

    public static String getReadableByteCount(long bytes) {

        if (bytes < FileUtils.ONE_KB) {

            return bytes + " B";

        }


        int exp = (int) (Math.log(bytes) / Math.log(FileUtils.ONE_KB));

        String pre = "" + "KMGTPE".charAt(exp - 1);

        double value = bytes / Math.pow(FileUtils.ONE_KB, exp);