java实现获取用户的MAC地址

java实现获取用户的MAC地址

方法一：将本机地址与局域网内其他机器区分开来

/**

* 根据IP地址获取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";

// 如果为127.0.0.1,则获取本地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();

// 下面代码是把mac地址拼装成String

StringBuilder sb = new StringBuilder();

for (int i = 0; i < mac.length; i++) {

if (i != 0) {

sb.append("-");

}

// mac[i] & 0xFF 是为了把byte转化为正整数

String s = Integer.toHexString(mac[i] & 0xFF);

sb.append(s.length() == 1 ? 0 + s : s);

}

// 把字符串所有小写字母改为大写成为正规的mac地址并http://返回

macAddress = sb.toString().trim().toUpperCase();

return macAddress;

} else {

// 获取非本地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;

}

}

我们再来看下方法二：

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获取客户端网卡的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.获取客户端ip地址( 这个必须从客户端传到后台)：

// jsp页面下，很简单，request.getRemoteAddr() ;

// 因为系统的VIew层是用JSF来实现的，因此页面上没法直接获得类似request，在bean里做了个强制转换

// public String getMyIP() {

// try {

// FacesContext fc = FacesContext.getCurrentInstance();

// HttpServletRequest request = (HttpServletRequest) fc

// .getExternalContext().getRequest();

// return request.getRemoteAddr();

// } catch (Exception e) {

// e.printStackTrace();

// }

// return "";

// }

// 2.获取客户端mac地址

// 调用window的命令，在后台Bean里实现 通过ip来获取mac地址。方法如下：

// 运行速度【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;

}

// 运行速度【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) {

ifacVyks (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，更精简一些

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 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;

}

}

最后要放大招了，小伙伴们看仔细哦

首先要说的是：本方法可以支持外网机器的mac地址获取。

以前弄了一个只能访问局域网。 有防火墙就访问不了， 但是这个不用担心了。

测试了百度的ip，已经可以获得mac地址

java通过ip获取mac地址-封ip封mac地址

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 = ""; http://

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 racVyksesult = "";

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;

}

//做个测试

public static void main(String[] args) {

System.out.println(getMacAddress("220.181.111.148"));

}

}

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