ip utils..

IpUtil.java

package util;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;


/**
 * @author zacconding
 * @Date 2018-01-14
 * @GitHub : https://github.com/zacscoding
 */
public class IpUtil {
    /**
     * Get ip address from network interfaces
     *
     * @return ip addr or null
     */
    public static String getIpAddr() {
        try {
            Enumeration<NetworkInterface> networkEnum = NetworkInterface.getNetworkInterfaces();

            while (networkEnum.hasMoreElements()) {
                NetworkInterface ni = networkEnum.nextElement();
                if (ni.isLoopback()) {
                    continue;
                }

                Enumeration<InetAddress> inetAddresses = ni.getInetAddresses();

                while (inetAddresses.hasMoreElements()) {
                    InetAddress ia = inetAddresses.nextElement();
                    if (ia.getHostAddress() != null && ia.getHostAddress().indexOf(".") != -1) {
                        return ia.getHostAddress();
                    }
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }

        return null;
    }
}