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 Main{
	
	// 将byte[] 数组转换为16进制 
    public static String bytes2HexString(byte[] b) {  
        String ret = "";  
        for (int i = 0; i < b.length; i++) {  
            String hex = Integer.toHexString(b[ i ] & 0xFF);  
        if (hex.length() == 1) {  
            hex = '0' + hex;  
        }  
         ret += hex.toUpperCase();  
      }  
      return ret;  
    }   
	
	public static void main(String []args) throws UnknownHostException, SocketException{
		
		//Main.getIp();
		Enumeration allNetInterfaces = NetworkInterface.getNetworkInterfaces();
		InetAddress ip = null;
		while (allNetInterfaces.hasMoreElements())
		{
		NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
		System.out.println(netInterface.getName());
		Enumeration addresses = netInterface.getInetAddresses();
		while (addresses.hasMoreElements())
		{
		ip = (InetAddress) addresses.nextElement();
		if (ip != null && ip instanceof Inet4Address)
		{
		System.out.println("本机的IP = " + ip.getHostAddress());
		}
		}
		}
		
		
		
	}
	
	
	
	public static byte[] getIp() throws UnknownHostException {

         byte[] b = InetAddress.getLocalHost().getAddress();

         Enumeration allNetInterfaces = null;

         try {

         allNetInterfaces = NetworkInterface.getNetworkInterfaces();

         } catch (SocketException e) {

         e.printStackTrace();

         }

         InetAddress ip = null;

         NetworkInterface netInterface = null;

         while (allNetInterfaces.hasMoreElements()) {

         netInterface = (NetworkInterface) allNetInterfaces.nextElement();

         if (netInterface.getName().trim().equals("eth0")){

         Enumeration addresses = netInterface.getInetAddresses();

         while (addresses.hasMoreElements()) {

         ip = (InetAddress) addresses.nextElement();

         }

         break;

         }

         }

         if (ip != null && ip instanceof Inet4Address) {

         return b = ip.getAddress();

         }

         return b;

         }
	
}