java 获取mac地址的两种方法(推荐)

public static void main(String[] args) throws Exception {InetAddress ia = InetAddress.getLocalHost();System.out.println(getMACAddress(ia));}

private static String getMACAddress(InetAddress ia) throws Exception {// 获得网络接口对象（即网卡），并得到mac地址，mac地址存在于一个byte数组中。byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();// 下面代码是把mac地址拼装成StringStringBuffer sb = new StringBuffer();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return sb.toString().toUpperCase();}

public static void main(String[] args) throws Exception {getMac("192.168.1.186");}

public static String getMac(String ip){String str = null;String mac = null;try{Process p = Runtime.getRuntime().exec("nbtstat -A " + ip); InputStreamReader ir = new InputStreamReader(p.getInputStream(),"gbk"); LineNumberReader input = new LineNumberReader(ir); for (; true;) { str = input.readLine(); if (str != null) {if (str.indexOf("MAC 地址") > 1) {mac = str.substring(str.indexOf("MAC 地址") + 9);break; }}}System.out.println(mac);}catch(IOException e){e.printStackTrace();}return mac;}