Java根据ip地址获取Mac地址

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;

public class MacUtils {

	/**
     * 根据IP地址获取mac地址
     * @param ipAddress 如：127.0.0.1
     * @return
     * @throws SocketException
     * @throws UnknownHostException
     */
    public static String getMac(String ipAddress) throws SocketException,
            UnknownHostException {
        String str = "";
        String macAddress = "";
        final String LOOPBACK_ADDRESS = "127.0.0.1";
        // 如果为127.0.0.1,则获取本地MAC地址。
        if (LOOPBACK_ADDRESS.equals(ipAddress)) {
            InetAddress inetAddress = InetAddress.getLocalHost();
            // 貌似此方法需要JDK1.6。
            byte[] mac = NetworkInterface.getByInetAddress(inetAddress).getHardwareAddress();
            // 下面代码是把mac地址拼装成String
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < mac.length; i++) {
                if (i != 0) {
                    sb.append("-");
                }
                // mac[i] & 0xFF 是为了把byte转化为正整数
                String s = Integer.toHexString(mac[i] & 0xFF);
                sb.append(s.length() == 1 ? 0 + s : s);
            }
            // 把字符串所有小写字母改为大写成为正规的mac地址并返回
            macAddress = sb.toString().trim().toUpperCase();
            return macAddress;
        } else {
            // 获取非本地IP的MAC地址
            try {
                //System.out.println(ipAddress);
                Process p = Runtime.getRuntime().exec("nbtstat -A " + ipAddress);
                //System.out.println("===process=="+p);
                InputStreamReader ir = new InputStreamReader(p.getInputStream());
                BufferedReader br = new BufferedReader(ir);
             
                while ((str = br.readLine()) != null) {
                    if(str.indexOf("MAC") > 1 ){
                        macAddress = str.substring(str.indexOf("MAC") + 9, str.length());
                        macAddress = macAddress.trim();
                        //System.out.println("macAddress:" + macAddress);
                        break;
                    }
                }
                p.destroy();
                br.close();
                ir.close();
            } catch (IOException ex) {
            }
            return macAddress;
        }
    }

    public static void main(String[] args) {
        System.out.println(System.currentTimeMillis());
        try {
        	System.out.println(getMac("10.10.16.170"));
		} catch (Exception e) {
			e.printStackTrace();
		}
        System.out.println(System.currentTimeMillis());
    }
    
    
}

 引用至：http://fanshuyao.iteye.com/blog/2317462

Java根据ip地址获取Mac地址