package org.xiazdong.utils.ip; import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.regex.Matcher; import java.util.regex.Pattern; public class IP2MACUtils { public static String getMacAddress(String ip) { String macAddress = ""; macAddress = getMacInWindows(ip).trim(); if (macAddress == null || "".equals(macAddress)) { macAddress = getMacInLinux(ip).trim(); } return macAddress; } private 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; } private 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; } private 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; } private 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; } private 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; } }