java获取mac地址

通过java获取mac地址，下面是完整的代码：

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package com.juziku.util;    import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.regex.Matcher; import java.util.regex.Pattern;       /** * 获取MAC地址 * @author sunlightcs * 2011-4-29 * http://hi.juziku.com/sunlightcs/ */ 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;       }             /**        * 测试        */         public static void main(String[] args) {                   System.out.println(getMacAddress( "192.168.10.203" ));       }            }