调用cmd命令行命令（借鉴）

留待以后观看

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public class IP_MAC_TypeHelper {

	/**
	 * 控制台执行arp -a命令
	 *
	 * @return
	 *
	 */
	public static InputStream getInputStream() {
		Runtime rt = Runtime.getRuntime();
		InputStream in = null;
		try {
			Process p = rt.exec("cmd.exe /c arp -a");
			in = p.getInputStream();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return in;

	}

	/**
	 * 获取的字节流转成String
	 *
	 * @param in
	 * @return
	 */
	public static String read(InputStream in) {
		InputStreamReader isr;
		try {
			isr = new InputStreamReader(in, "GBK");
			BufferedReader br = new BufferedReader(isr);
			String inline = null;
			StringBuffer sb = new StringBuffer();
			while ((inline = br.readLine()) != null) {
				// System.out.println(inline);
				sb.append(inline);
			}
			return sb.toString();
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;

	}

	/**
	 * 格式化输出信息
	 *
	 * @param msg
	 * @return
	 */
	public static String[] getMsg(String msg) {
		//按换行截取
		String[] tempmessage = msg.split("\r\n");
		StringBuffer sb = new StringBuffer();
		for (String s : tempmessage) {
			sb.append(s + " ");
		}
		String temp = sb.toString();
		return temp.split(" {1,}");
	}

	/**
	 * 截取IP地址信息
	 *
	 * @param msg
	 * @return
	 */
	public static List<String> getIp(String[] msg) {
		List<String> list = new ArrayList<String>();
		for (String s : msg) {
			boolean flag = s.matches("^[0-9]{1,3}(\\.[0-9]{1,3}){3}$");// 匹配IP的正则
			if (flag) {
				list.add(s);
			}
		}
		return list;
	}

	/**
	 * 截取MAC地址信息
	 *
	 * @param msg
	 * @return
	 */
	public static List<String> getMac(String[] msg) {
		List<String> list = new ArrayList<String>();
		String regx = "^[a-zA-Z0-9]{2}(-[a-zA-Z0-9]{2}){5}$"; // 匹配MAC地址的正则
		for (String s : msg) {
			if (s.matches(regx)) {
				list.add(s);
			}
		}
		return list;
	}

	/**
	 * 截取类型信息
	 *
	 * @param msg
	 * @return
	 */
	public static List<String> getType(String[] msg) {

		List<String> list = new ArrayList<String>();
		for (String s : msg) {
			if (s.contains("态")) { // 判断是否为指定字符
				list.add(s);
			}
		}
		return list;

	}

	/**
	 * 移除本机IP（包含网卡）
	 * @param ipList
	 * @return
	 */
	public static List<String> removeLocalIp(List<String> ipList) {
		List<String> ripList = new ArrayList<String>();
		try {
			Enumeration<NetworkInterface> netInterfaces = NetworkInterface
					.getNetworkInterfaces();
			while (netInterfaces.hasMoreElements()) {
				NetworkInterface nif = netInterfaces.nextElement();
				Enumeration<InetAddress> iparray = nif.getInetAddresses();
				while (iparray.hasMoreElements()) {
					/*
					 * System.out.println("IP:" +
					 * iparray.nextElement().getHostAddress());
					 */
					ripList.add(iparray.nextElement().getHostAddress());
				}
			}

		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
		for (int i = 0; i < ipList.size() - 1; i++) {
			for (String rip : ripList) {
				if (ipList.get(i).equals(rip)) {
					ipList.remove(i);
				}
			}
		}
		return ipList;
	}

	/**
	 * 获取对应的IP、MAC、类型
	 * @return
	 */
	public static List<Admin> getIp_Mac_Type() {
		List<Admin> aList = new ArrayList<Admin>();
		 InputStream in = getInputStream();
		 String message = read(in);
		 String[] msg = getMsg(message);
		 List<String> list_ip = removeLocalIp(getIp(msg));
		 List<String> list_mac = getMac(msg);
		 List<String> list_type = getType(msg);
		 for(int i = 0; i<list_ip.size(); i++){
			 Admin admin = new Admin();
			 admin.setIp(list_ip.get(i));
			 admin.setMac(list_mac.get(i));
			 admin.setType(list_type.get(i));
			 aList.add(admin);
		 }
		 for(Admin a:aList){
			 System.out.println(a.getIp());
		 }
		return aList;
	}

}

我们知道在cmd命令行窗口中输入arp -a能得到局域网下所有IP，上述代码调用该命令得到所有IP，以上仅为借鉴。有待完善。。。

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