方法一：将本机地址与局域网内其他机器区分开来
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/**
* 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) {
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;
/**
* 获取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 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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