package com.yswc.dao.sign; import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.regex.Matcher; import java.util.regex.Pattern; /**  *  * 获取MAC地址  *  * @author  *  * 2011-12  *  */ public class GetMacAddress { 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);       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;   }   /**   * 获取MAC地址   *   * @return 返回MAC地址   */  public static String getMacAddress(String ip){      String macAddress = "";      macAddress = getMacInWindows(ip).trim();      if(macAddress==null||"".equals(macAddress)){          macAddress = getMacInLinux(ip).trim();      }      return macAddress;  }  public static void main(String[] args) {  String mac=getMacAddress("192.168.1.102");  System.out.println("mac:"+mac); } }