package com.xindatai.common.util;

import java.io.InputStream;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class Lime {

    public static void main(String[] args) throws Exception {

        String mac = getMacAdderss("192.168.10.10");

        System.out.println(mac);

    }

    /**

     * 获取mac地址

     *

     * @author Liang

     *

     * 2017年4月26日

     */

    private static String getMacAdderss(String ip) throws Exception {

        if(ping(ip)){

            String result = command("arp -a " + ip);

            String regExp = "([0-9A-Fa-f]{2})([-:][0-9A-Fa-f]{2}){5}";

            Pattern pattern = Pattern.compile(regExp);

            Matcher matcher = pattern.matcher(result);

            StringBuilder mac = new StringBuilder();

//            对字符串进行匹配,匹配到的字符串可以在任何位置

            while(matcher.find()){

//                返回匹配到的子字符串

                String temp = matcher.group();

                mac.append(temp);

            }

            return mac.toString();

        }

        return null;

    }

    /**

     * ping ip

     *

     * @param ip

     *

     * @return

     *

     * @author Liang

     *

     * 2017年4月26日

     */

    private static boolean ping(String ip) throws Exception {

        String os = getOsName();

        String ping = "";

        if(os.startsWith("Windows")){

            ping = "ping " + ip + " -n 2";

        }else if(os.startsWith("Linux")){

            ping = "ping " + ip + " -c 2";

        }

        String result = command(ping);

        if(result.contains("TTL") || result.contains("ttl")){

            return true;

        }

        return false;

    }

    /**

     * 执行单条指令

     *

     * @param cmd 命令

     *

     * @return 执行结果

     *

     * @author Liang

     *

     * 2017年4月26日

     */

    private static String command(String cmd) throws Exception {

        Process process = Runtime.getRuntime().exec(cmd);

        process.waitFor();

        InputStream in = process.getInputStream();

        StringBuilder result = new StringBuilder();

        byte[] data = new byte[256];

        while(in.read(data) != -1){

//            操作系统中的编码方式

            String encoding = System.getProperty("sun.jnu.encoding");

            result.append(new String(data,encoding));

        }

        return result.toString();

    }

    private static String getOsName() {

        return System.getProperty("os.name");

    }

}