给定一个数字格式的ip，返回一个字节数组，该数组可以被馈送到InetAddress。

//package com.nowjava;
/** 来 自 时代Java公众号**/

public class Main {

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

        long ip = 2;

        System.out.println(java.util.Arrays

                .toString(numericIpToByteArray(ip)));

    }


    /**

     * Given an ip in numeric format, return a byte array that can be fed to

     * InetAddress.

     * @param ip the ip address in long (such as 3232235780)

     * @return the byte array.

     */

    public static byte[] numericIpToByteArray(long ip) {

        byte[] ipArray = new byte[4];

        ipArray[3] = (byte) (ip & 0xff);

        ipArray[2] = (byte) ((ip >> 8) & 0xff);

        ipArray[1] = (