package laobao;
import java.net.InetAddress;
public class Demo01 {
    public static void main(String args[]) throws Exception{
        InetAddress localAddress = InetAddress.getLocalHost();
        System.out.println("本地IP ：" + localAddress.getHostAddress() );
    }
}

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


public class GetIpsInfo {
    public static void main(String[] args) {
        Enumeration nettworkInterfaces = null;
        try {
            nettworkInterfaces = NetworkInterface.getNetworkInterfaces();
            while (nettworkInterfaces.hasMoreElements()) {
            System.out.println("---------------------");
                NetworkInterface networkInterface = (NetworkInterface) nettworkInterfaces.nextElement();
                System.out.println("DisplayName = " + networkInterface.getDisplayName());
                System.out.println("       Name = " + networkInterface.getName());
                Enumeration inetAddresses = networkInterface.getInetAddresses();
                while (inetAddresses.hasMoreElements()) {
                    System.out.println("这块网卡的IP = "
                            + ((InetAddress) inetAddresses.nextElement()).getHostAddress());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    System.out.println("---------------------");   
       
    }

}