方法一：將本機位址與區域網路內其他機器區分開來
/** * 依據IP位址取得mac位址* @param ipAddress 127.0.0.1 * @return * @throws SocketException * @throws UnknownHostException */ public static String getLocalMac(String ipAddress) throws Socket Sodion, Unxnown stub String str = ""; String macAddress = ""; final String LOOPBACK_ADDRESS = "127.0.0.1"; // 若為127.0.0.1,則取得本機MAC位址。 if (LOOPBACK_ADDRESS.equals(ipAddress)) { InetAddress inetAddress = InetAddress.getLocalHost(); // 看起來此方法需要JDK1.6。 byte[] mac = NetworkInterface.getByInetAddress(inetAddress) .getHardwareAddress(); // 以下程式碼是把mac位址拼裝成String StringBuilder sb = new StringBuilder(); for (int i = 0; i < mac.length; i++) { if (i != 0) { sb.append("-"); } // mac[i] & 0xFF 是為了把byte轉換成正整數String s = Integer.toHexString(mac[i] & 0xFF); sb.append(s.length() == 1 ? 0 + s : s); } // 把字串所有小寫字母改為大寫成為正規的mac位址並傳回macAddress = sb.toString().trim().toUpperCase(); return macAddress; } else { // 取得非本地IP的MAC位址try { System.out.println(ipAddress); Process p = Runtime.getRuntime() .exec("nbtstat -A " + ipAddress); System.out.println ("===process=="+p); InputStreamReader ir = new InputStreamReader(p.getInputStream()); BufferedReader br = new BufferedReader(ir); while ((str = br.readLine()) != null) { if(str.indexOf("MAC")>1){ macAddress = str.substring(str.indexOf("MAC") +9, str.length()); macAddress = macAddress.trim(); System.out.println("macAddress:" + macAddress); break; } } p.destroy(); br.close(); ir.close(); } catch (IOException ex) { } return macAddress; } }我們再來看下方法二：
package com.alpha.test;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.LineNumberReader;public class GetMac {/** * * java取得客戶端網路卡的MAC位址* * @param args */public static void main(String[] args) {GetMac get = new GetMac();System.out.println("1="+get.getMAC());System.out.println("2="+get.getMAC("127.0.0.1") );}// 1.取得客戶端ip位址( 這個必須從客戶端傳到後台)：// jsp頁面下，很簡單，request.getRemoteAddr() ;//因為系統的VIew層是用JSF來實現的，所以頁面上沒法直接獲得類似request，在bean裡做了個強制轉換// public String getMyIP() {// try {// FacesContext fc = FacesContext.getCurrentInstance ();// HttpServletRequest request = (HttpServletRequest) fc// .getExternalContext().getRequest();// return request.getRemoteAddr();// } catch (Exception e) {// e.printStackTrace();// }// return "";// }// 2 .取得客戶端mac位址// 呼叫window的指令，在後台Bean裡實作透過ip來取得mac位址。方法如下：// 運轉速度【快】public String getMAC() {String mac = null;try {Process pro = Runtime.getRuntime().exec("cmd.exe /c ipconfig/all");InputStream is = pro .getInputStream();BufferedReader br = new BufferedReader(new InputStreamReader(is));String message = br.readLine();int index = -1;while (message != null) {if ((index = message.indexOf("Physical Address")) > 0) {mac = message.substring(index + 36). trim();break;}message = br.readLine();}System.out.println(mac);br.close();pro.destroy();} catch (IOException e) {System.out.println("Can't get mac address!" );return null;}return mac;}// 運轉速度【慢】public String getMAC(String ip) {String str = null;String macAddress = null;try {Process p = Runtime.getRuntime().exec("nbtstat -A " + ip);InputStreamReader ir = new InputStreamReader(p.getInputStream());LineNumberReader input = new LineNumberReader(ir);for (; true);LineNumberReader input = new LineNumberReader(ir);for (; true ;) {str = input.readLine();if (str != null) {if (str.indexOf("MAC Address") > 1) {macAddress = str.substring(str.indexOf("MAC Address") + 14);break;}}}} catch (IOException e) {e.printStackTrace(System.out);return null; }return macAddress;}}方法三，更精簡一些
import java.io.IOException;import java.io.InputStreamReader;import java.io.LineNumberReader;public class MACAddress { String ip; String mac; public MACAddress (String ip){ this.ip = ip; } public MACmacress; this.ip = "0.0.0.0"; } public String getMac(){ try { Process p = Runtime.getRuntime().exec("arp -n"); InputStreamReader ir = new InputStreamReader(p.getInputStream()); LineNumberReader input = new LineNumberReader(ir); p.waitFor(); boolean flag = true ; String ipStr = "(" + this.ip + ")"; while(flag) { String str = input.readLine(); if (str != null) { if (str.indexOf(ipStr) > 1) { int temp = str.indexOf("at"); this.mac = str.substring( temp + 3, temp + 20); break; } } else flag = false; } } catch (IOException | InterruptedException e) { e.printStackTrace(System.out); } return this.mac; } public void setIp(String ip){ this.ip = ip; }}最後要放大招了，小朋友看仔細哦
首先要說的是：本方法可以支援外網機器的mac位址取得。
以前弄了一個只能存取區域網路。 有防火牆就訪問不了， 但是這個不用擔心了。
測試了百度的ip，已經可以取得mac位址
java透過ip取得mac位址-封ip封mac位址
import java.io.BufferedReader;import java.io.InputStreamReader;import java.util.regex.Matcher;import java.util.regex.Pattern;/*** 取得MAC位址* @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 第一個指令* @param another 第二個指令* @return 第二個指令的執行結果*/ public static String callCmd(String[ ] cmd,String[] another) { String result = ""; String line = ""; try { Runtime rt = Runtime.getRuntime(); Process proc = rt.exec(cmd); proc.waitFor(); //已經執行完第一個指令，準備執行第二個指令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 目標ip,一般在區域網路內* @param sourceString 指令處理的結果字串* @param macSeparator mac分隔符號* @return mac位址，用上面的分隔符號表示*/ public static String filterMacAddress(final String ip, final String sourceString,final String macSeparator) { String result = ""; String regExp = "((([0-9,AF,af]{1,2}" + macSeparator + "){1,5})[0-9 ,AF,af]{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; //如果有多個IP ,只符合本IP對應的Mac. } } return result; } /** * * @param ip 目標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 目標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; } //** * 取得MAC位址* @return 傳回MAC位址*/ public static String getMac** (String ip){ String macAddress = ""; macAddress = getMacInWindows(ip).trim(); if(macAddress==null||"".equals(macAddress)){ macAddress = getMacInLinux(ip).trim(); } return macAddress; } //做個測試public static void main(String[] args) { System.out.println(getMacAddress("220.181.111.148")); } }