根据IP获取Mac Address

Mac Address(Physical Address), 作为计算机的一个重要的标识，已经赢得很多的注册软件作为标识符号的青睐(尽管高级用户可以随意修改这个地址)。 下面是Java代码程序，没有经过更多平台的测试。使用时,请对平台进行更多测试.

   如果你测试通过了X平台,或经过修改后成功取得了数据。请奉献出来或给予评论.

/**
*
* @author ihavegotyou
* Created on 2010-01-23
* Email ihavegotyou520 AT hotmail DOT com
*/

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 根据ip获取MAC地址.
 *
 * @author ihavegotyou
 * @version 10.1.23
 */
public class GetMacFromIp {

	public static String callCmd(String[] cmd) {
		String result = "";
		String line = "";
		try {
			Process proc = Runtime.getRuntime().exec(cmd);
			InputStreamReader is = new InputStreamReader(proc.getInputStream());
			BufferedReader br = new BufferedReader (is);
			while ((line = br.readLine ()) != null) {
			result += line;
			}
		}
		catch(Exception e) {
			e.printStackTrace();
		}
		return result;
	}

    /**
     *
     * @param cmd  第一个命令
     * @param another 第二个命令
     * @return   第二个命令的执行结果
     */
	public static String callCmd(String[] cmd,String[] another) {
		String result = "";
		String line = "";
		try {
			Runtime rt = Runtime.getRuntime();
			Process proc = rt.exec(cmd);
			int exitVal = proc.waitFor();  //已经执行完第一个命令，准备执行第二个命令
			proc = rt.exec(another);
			InputStreamReader is = new InputStreamReader(proc.getInputStream());
			BufferedReader br = new BufferedReader (is);
			while ((line = br.readLine ()) != null) {
				result += line;
			}
		}
		catch(Exception e) {
			e.printStackTrace();
		}
		return result;
	}




    /**
     *
     * @param ip  目标ip,一般在局域网内
     * @param sourceString 命令处理的结果字符串
     * @param macSeparator mac分隔符号
     * @return  mac地址，用上面的分隔符号表示
     */
	public static String filterMacAddress(final String ip, final String sourceString,final String macSeparator) {
		String result = "";
		String regExp = "((([0-9,A-F,a-f]{1,2}" + macSeparator + "){1,5})[0-9,A-F,a-f]{1,2})";
		Pattern pattern = Pattern.compile(regExp);
		Matcher matcher = pattern.matcher(sourceString);
		while(matcher.find()){
			result = matcher.group(1);
			if(sourceString.indexOf(ip) <= sourceString.lastIndexOf(matcher.group(1))) {
				break;  //如果有多个IP,只匹配本IP对应的Mac.
		    }
		}

		return result;
	}

    /**
     *
     * @param ip 目标ip
     * @return   Mac Address
     *
     */
	public static String getMacInWindows(final String ip){
		String result = "";
		String[] cmd = {
				"cmd",
				"/c",
				"ping " +  ip
				};
		String[] another = {
				"cmd",
				"/c",
				"arp -a"
				};

		String cmdResult = callCmd(cmd,another);
		result = filterMacAddress(ip,cmdResult,"-");

		return result;
	}


	/**
    *
    * @param ip 目标ip
    * @return   Mac Address
    *
    */
	public static String getMacInLinux(final String ip){
		String result = "";
		String[] cmd = {
				"/bin/sh",
				"-c",
				"ping " +  ip + " -c 2 && arp -a"
				};
		String cmdResult = callCmd(cmd);
		result = filterMacAddress(ip,cmdResult,":");

		return result;
	}


	/**
	* 测试
	*/
	public static void main(String[] args) {
		String fileSeparator = System.getProperty("file.separator"); //根据文件分隔符号区分平台
		if (fileSeparator.equals("/")){
			System.out.println(getMacInLinux("192.168.199.42"));
		}
		else if(fileSeparator.equals("\\")){
			System.out.println(getMacInWindows("192.168.1.175"));  //nicrosoft喜欢对着干
			//System.out.println(getMacInWindows("127.0.0.1"));
		}
	}

}