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检索正在运行的计算机的第一个非环回IP地址（即，过滤出127.0.0.1地址）。
/** * Copyright (c) Codice Foundation * * This is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser * General Public License as published by the Free Software Foundation, either version 3 of the * License, or 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 * Lesser General Public License for more details. A copy of the GNU Lesser General Public License * is distributed along with this program and can be found at * <http://www.gnu.org/licenses/lgpl.html>. * **/ //package com.nowjava; /** * 时 代 J a v a - nowjava.com 提 供 **/ import java.net.Inet4Address; import java.net.Inet6Address; import java.net.InetAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.util.Enumeration; public class Main { public static void main(String[] argv) throws Exception { System.out.println(getFirstNonLoopbackAddress()); }/** 来 自 N o w J a v a . c o m**/ /** * Retrieves the first non-loopback IP address, (i.e., filters out 127.0.0.1 addresses) for * machine your are running on. * * @return * @throws SocketException */ public static InetAddress getFirstNonLoopbackAddress() throws SocketException { return getFirstNonLoopbackAddress(true, false); } /** * @param preferIpv4 * @param preferIPv6 * @return * @throws SocketException */ public static InetAddress getFirstNonLoopbackAddress( boolean preferIpv4, boolean preferIPv6) throws SocketException { Enumeration en = NetworkInterface.getNetworkInterfaces(); while (en.hasMoreElements()) { NetworkInterface i = (NetworkInterface) en.nextElement(); for (Enumeration en2 = i.getInetAddresses(); en2 .hasMoreElements();) { InetAddress addr = (InetAddress) en2.nextElement(); if (!addr.isLoopbackAddress()) { if (addr instanceof Inet4Address) { if (preferIPv6) {