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
*@paramipAddress127.0.0.1
*@return
*@throwsSocketException
*@throwsUnknownHostException
*/
publicstaticStringgetLocalMac(StringipAddress)throwsSocketException,
UnknownHostException{
//TODOAuto-generatedmethodstub
Stringstr="";
StringmacAddress="";
finalStringLOOPBACK_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)){
InetAddressinetAddress=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
StringBuildersb=newStringBuilder();
for(inti=0;i<mac.length;i++){
if(i!=0){
sb.append("-");
}
//mac[i]&0xFF是为了把byte转化为正整数
Strings=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();
returnmacAddress;
}else{
//获取非本地IP的MAC地址
try{
System.out.println(ipAddress);
Processp=Runtime.getRuntime()
.exec("nbtstat-A"+ipAddress);
System.out.println("===process=="+p);
InputStreamReaderir=newInputStreamReader(p.getInputStream());
BufferedReaderbr=newBufferedReader(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(IOExceptionex){
}
returnmacAddress;
}
}
我们再来看下方法二：
packagecom.alpha.test;
importjava.io.BufferedReader;
importjava.io.IOException;
importjava.io.InputStream;
importjava.io.InputStreamReader;
importjava.io.LineNumberReader;
publicclassGetMac{
/**
*java获取客户端网卡的MAC地址
*
*@paramargs
*/
publicstaticvoidmain(String[]args){
GetMacget=newGetMac();
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
//publicStringgetMyIP(){
//try{
//FacesContextfc=FacesContext.getCurrentInstance();
//HttpServletRequestrequest=(HttpServletRequest)fc
//.getExternalContext().getRequest();
//returnrequest.getRemoteAddr();
//}catch(Exceptione){
//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】
publicStringgetMAC(){
Stringmac=null;
try{
Processpro=Runtime.getRuntime().exec("cmd.exe/cipconfig/all");
InputStreamis=pro.getInputStream();
BufferedReaderbr=newBufferedReader(newInputStreamReader(is));
Stringmessage=br.readLine();
intindex=-1;
while(message!=null){
if((index=message.indexOf("PhysicalAddress"))>0){
mac=message.substring(index+36).trim();
break;
}
message=br.readLine();
}
System.out.println(mac);
br.close();
pro.destroy();
}catch(IOExceptione){
System.out.println("Can'tgetmacaddress!");
returnnull;
}
returnmac;
}
//运行速度【慢】
publicStringgetMAC(Stringip){
Stringstr=null;
StringmacAddress=null;
try{
Processp=Runtime.getRuntime().exec("nbtstat-A"+ip);
InputStreamReaderir=newInputStreamReader(p.getInputStream());
LineNumberReaderinput=newLineNumberReader(ir);
for(;true;){
str=input.readLine();
if(str!=null){
if(str.indexOf("MACAddress")>1){
macAddress=str
.substring(str.indexOf("MACAddress")+14);
break;
}
}
}
}catch(IOExceptione){
e.printStackTrace(System.out);
returnnull;
}
returnmacAddress;
}
}
方法三，更精简一些
importjava.io.IOException;
importjava.io.InputStreamReader;
importjava.io.LineNumberReader;
publicclassMACAddress{
Stringip;
Stringmac;
publicMACAddress(Stringip){
this.ip=ip;
}
publicMACAddress(){
this.ip="0.0.0.0";
}
publicStringgetMac(){
try{
Processp=Runtime.getRuntime().exec("arp-n");
InputStreamReaderir=newInputStreamReader(p.getInputStream());
LineNumberReaderinput=newLineNumberReader(ir);
p.waitFor();
booleanflag=true;
StringipStr="("+this.ip+")";
while(flag){
Stringstr=input.readLine();
if(str!=null){
if(str.indexOf(ipStr)>1){
inttemp=str.indexOf("at");
this.mac=str.substring(
temp+3,temp+20);
break;
}
}else
flag=false;
}
}catch(IOException|InterruptedExceptione){
e.printStackTrace(System.out);
}
returnthis.mac;
}
publicvoidsetIp(Stringip){
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
importjava.io.BufferedReader;
importjava.io.InputStreamReader;
importjava.util.regex.Matcher;
importjava.util.regex.Pattern;
/**
*获取MAC地址
*@author
*2011-12
*/
publicclassGetMacAddress{
publicstaticStringcallCmd(String[]cmd){
Stringresult="";
Stringline="";
try{
Processproc=Runtime.getRuntime().exec(cmd);
InputStreamReaderis=newInputStreamReader(proc.getInputStream());
BufferedReaderbr=newBufferedReader(is);
while((line=br.readLine())!=null){
result+=line;
}
}
catch(Exceptione){
e.printStackTrace();
}
returnresult;
}
/**
*
*@paramcmd第一个命令
*@paramanother第二个命令
*@return第二个命令的执行结果
*/
publicstaticStringcallCmd(String[]cmd,String[]another){
Stringresult="";
Stringline="";
try{
Runtimert=Runtime.getRuntime();
Processproc=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);
InputStreamReaderis=newInputStreamReader(proc.getInputStream());
BufferedReaderbr=newBufferedReader(is);
while((line=br.readLine())!=null){
result+=line;
}
}
catch(Exceptione){
e.printStackTrace();
}
returnresult;
}
/**
*
*@paramip目标ip,一般在局域网内
*@paramsourceString命令处理的结果字符串
*@parammacSeparatormac分隔符号
*@returnmac地址，用上面的分隔符号表示
*/
publicstaticStringfilterMacAddress(finalStringip,finalStringsourceString,finalStringmacSeparator){
Stringresult="";
StringregExp="((([0-9,A-F,a-f]{1,2}"+macSeparator+"){1,5})[0-9,A-F,a-f]{1,2})";
Patternpattern=Pattern.compile(regExp);
Matchermatcher=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.
}
}
returnresult;
}
/**
*
*@paramip目标ip
*@returnMacAddress
*
*/
publicstaticStringgetMacInWindows(finalStringip){
Stringresult="";
String[]cmd={
"cmd",
"/c",
"ping"+ip
};
String[]another={
"cmd",
"/c",
"arp-a"
};
StringcmdResult=callCmd(cmd,another);
result=filterMacAddress(ip,cmdResult,"-");
returnresult;
}
/**
*@paramip目标ip
*@returnMacAddress
*
*/
publicstaticStringgetMacInLinux(finalStringip){
Stringresult="";
String[]cmd={
"/bin/sh",
"-c",
"ping"+ip+"-c2&&arp-a"
};
StringcmdResult=callCmd(cmd);
result=filterMacAddress(ip,cmdResult,":");
returnresult;
}
/**
*获取MAC地址
*@return返回MAC地址
*/
publicstaticStringgetMacAddress(Stringip){
StringmacAddress="";
macAddress=getMacInWindows(ip).trim();
if(macAddress==null||"".equals(macAddress)){
macAddress=getMacInLinux(ip).trim();
}
returnmacAddress;
}
//做个测试
publicstaticvoidmain(String[]args){
System.out.println(getMacAddress("220.181.111.148"));
}
}