java web根据访问的ip地址获取MAC地址

<span style="white-space:pre">	</span>/**
	 * 取客户端MAC地址
	 * @author huangwg 2014-06-26
	 */
	public static String getMACAddress(HttpServletRequest request) {
		String macAddress = "";
		String ip = getClientIPAddress(request);
		
		Properties props = System.getProperties();
		if(props.get("os.name").toString().contains("Window")){	//判断操作系统
			if(ip.equals("127.0.0.1")){			//本机的IP地址查询不了，要转成192.xxx.xxx.xxx的形式
				InetAddress addr = null;
				try {
					addr = InetAddress.getLocalHost();
					ip=addr.getHostAddress().toString();
				} catch (UnknownHostException e) {
					ip = "127.0.0.1";
				}
			}
			String str = "";
			try {
				Process p = Runtime.getRuntime().exec("nbtstat -A " + ip);
				InputStreamReader ir = new InputStreamReader(p.getInputStream());
				LineNumberReader input = new LineNumberReader(ir);
				for (int i = 1; i < 100; i++) {
					str = input.readLine();
					if (str != null) {
						if (str.contains("MAC Address")) {
							macAddress = str.substring(str.indexOf("MAC Address") + 14, str.length());
							break;
						}else if(str.contains("MAC 地址")){		//有的机器会显示中文
							macAddress = str.substring(str.indexOf("MAC 地址") + 9, str.length());
							break;
						}
					}
				}
			} catch (IOException e) {
				return "";
			}
		} else {
			try {
				Runtime.getRuntime().exec("ping -c1 " + ip);
				Process p = Runtime.getRuntime().exec(
						new String[] { "/bin/sh", "-c", "arp | grep " + ip + " | awk '{print $3}'" });
				InputStreamReader ir = new InputStreamReader(p.getInputStream());
				LineNumberReader input = new LineNumberReader(ir);
				macAddress = input.readLine();
			} catch (IOException e) {
				return "";
			}
		}
		return macAddress;
	}

在网上找到了两种方案，一种是通过js来获取，但是由于IE安全性的问题会有弹出提示框，让客户设备很麻烦所以放弃了。

一种是能过java代码，在网上只找到在window下的，没有Linux的，所以改良了一下。