Java 工具类 IpUtil - 获取本机所有 IP 地址，LocalHost 对应地址 IP

IP 工具类

源代码：

/**

 * <p>

 *

 * @author XiaoPengwei

 * @since 2019-07-20

 */

import java.net.Inet4Address;

import java.net.InetAddress;

import java.net.NetworkInterface;

import java.net.SocketException;

import java.net.UnknownHostException;

import java.util.Enumeration;

public class IpUtil {

    public static void main(String[] args) {

        IpUtil testGetIP = new IpUtil();

        System.out.println("Your LocalHost IP(ipv4) is:");

        System.out.println(testGetIP.getIP());

        System.out.println("\nHere are all your IPS:");

        testGetIP.printAllIp();

    }

    /**

     * Fond LocalHost ipv4

     *

     * @return java.lang.String

     */

    public String getIP() {

        try {

            // 根据 hostname 找 ip

            InetAddress address = InetAddress.getLocalHost();

            if (address.isLoopbackAddress()) {

                Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();

                while (allNetInterfaces.hasMoreElements()) {

                    NetworkInterface netInterface = allNetInterfaces.nextElement();

                    Enumeration<InetAddress> addresses = netInterface.getInetAddresses();

                    while (addresses.hasMoreElements()) {

                        InetAddress ip = addresses.nextElement();

                        if (!ip.isLinkLocalAddress() && !ip.isLoopbackAddress() && ip instanceof Inet4Address) {

                            return ip.getHostAddress();

                        }

                    }

                }

            }

            return address.getHostAddress();

        } catch (UnknownHostException | SocketException e) {

            e.printStackTrace();

            return null;

        }

    }

    /**

     * Find all network interfaces

     */

    public void printAllIp() {

        try {

            Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();

            while (allNetInterfaces.hasMoreElements()) {

                NetworkInterface netInterface = allNetInterfaces.nextElement();

                // Remove loopback interface, sub-interface, unrun and interface

                if (netInterface.isLoopback() || netInterface.isVirtual() || !netInterface.isUp()) {

                    continue;

                }

                Enumeration<InetAddress> addresses = netInterface.getInetAddresses();

                while (addresses.hasMoreElements()) {

                    InetAddress ip = addresses.nextElement();

                    if (ip != null) {

                        System.out.println("ip = " + ip.getHostAddress());

                        // ipv4

                        if (ip instanceof Inet4Address) {

                            System.out.println("ipv4 = " + ip.getHostAddress());

                            if (!ip.getHostAddress().startsWith("192") && !ip.getHostAddress().startsWith("10") && !ip.getHostAddress().startsWith("172")) {

                                // Intranet

                                ip.getHostAddress();

                            }

                        }

                    }

                }

            }

        } catch (SocketException e) {

            System.err.println("[Error] can't get host ip address" + e.getMessage());

        }

    }

}