Java -- 获取MAC地址

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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");
    }
}

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