/**   * 根據IP地址獲取mac地址   * @param ipAddress 127.0.0.1   * @return   * @throws SocketException   * @throws UnknownHostException   */  public static String getLocalMac(String ipAddress) throws SocketException,      UnknownHostException {    // TODO Auto-generated method stub    String str = "";    String macAddress = "";    final String LOOPBACK_ADDRESS = "127.0.0.1";    // 如果為127.0.0.1,則獲取本地MAC地址。    if (LOOPBACK_ADDRESS.equals(ipAddress)) {      InetAddress inetAddress = InetAddress.getLocalHost();      // 貌似此方法需要JDK1.6。      byte[] mac = NetworkInterface.getByInetAddress(inetAddress)          .getHardwareAddress();      // 下面代碼是把mac地址拼裝成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轉化為正整數        String s = Integer.toHexString(mac[i] & 0xFF);        sb.append(s.length() == 1 ? 0 + s : s);      }      // 把字符串所有小寫字母改為大寫成為正規的mac地址并返回      macAddress = sb.toString().trim().toUpperCase();      return macAddress;    } else {      // 獲取非本地IP的MAC地址      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;    }  }

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獲取客戶端網卡的MAC地址	 * 	 * @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.獲取客戶端ip地址( 這個必須從客戶端傳到后臺)：	// jsp頁面下，很簡單，request.getRemoteAddr() ;	// 因為系統的VIew層是用JSF來實現的，因此頁面上沒法直接獲得類似request，在bean里做了個強制轉換	// public String getMyIP() {	// try {	// FacesContext fc = FacesContext.getCurrentInstance();	// HttpServletRequest request = (HttpServletRequest) fc	// .getExternalContext().getRequest();	// return request.getRemoteAddr();	// } catch (Exception e) {	// e.printStackTrace();	// }	// return "";	// }	// 2.獲取客戶端mac地址	// 調用window的命令，在后臺Bean里實現 通過ip來獲取mac地址。方法如下：	// 運行速度【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;	}	// 運行速度【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;) {				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;	}}

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 MACAddress (){  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; }}

import java.io.BufferedReader;import java.io.InputStreamReader;import java.util.regex.Matcher;import java.util.regex.Pattern;/*** 獲取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 第一個命令    * @param another 第二個命令    * @return  第二個命令的執行結果    */    public static String callCmd(String[] cmd,String[] another) {      String result = "";      String line = "";      try {        Runtime rt = Runtime.getRuntime();        Process proc = rt.exec(cmd);        proc.waitFor(); //已經執行完第一個命令，準備執行第二個命令        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 目標ip,一般在局域網內    * @param sourceString 命令處理的結果字符串    * @param macSeparator mac分隔符號    * @return mac地址，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,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; //如果有多個IP,只匹配本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;    }       /**   * 獲取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;   }   //做個測試   public static void main(String[] args) {           System.out.println(getMacAddress("220.181.111.148"));   }  }