java实现获取用户的MAC地址方法：
方法一：将本机地址与局域网内其他机器区分开来
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 {
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) {
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;
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;
}
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;
}
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;
}
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;
}
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;
}
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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