JAVA如何获取客户端IP地址和MAC地址

JAVA如何获取客户端IP地址和MAC地址

本文介绍了java如何获取客户端IP地址和MAC地址 ，分享给大家，具体如下：

1.获取客户端IP地址

public String getIp(HttpServletRequest request) throws Exception {

String ip = request.getHeader("X-Forwarded-For");

if (ip != null) {

if (!ip.isEmpty() && !"unKnown".equalsIgnoreCase(ip)) {

int index = ip.indexOf(",");

if (index != -1) {

return ip.substring(0, index);

} else {

return ip;

}

}

}

ip = request.getHeader("X-Real-IP");

if (ip != null) {

if (!ip.isEmpty() && !"unKnown".equalsIgnoreCase(ip)) {

return ip;

}

}

return request.getRemoteAddr();

}

为什么不直接使用request.getRemoteAddr()；而要在之前判断两个请求头"X-Forwarded-For"和"X-Real-IP"

X-Forwarded-For: client1, proxy1, proxy2, proxy3

其中的值通过一个 逗号+空格 把多个IP地址区分开, 最左边(client1)是最原始客户端的IP地址, 代理服务器每成功收到一个请求，就把请求来源IP地址添加到右边。

所有我们只取第一个IP地址

X-Real-IP，一般只记录真实发出请求的客户端IP

解决用localhost访问ip为0:0:0:0:0:0:0:1的问题

public String getIp(HttpServletRequest request) throws Exception {

String ip = request.getHeader("X-Forwarded-For");

if (ip != null) {

if (!ip.isEmpty() && !"unKnown".equalsIgnoreCase(ip)) {

int index = ip.indexOf(",");

if (index != -1) {

return ip.substring(0, index);

} else {

return ip;

}

}

}

ip = request.getHeader("X-Real-IP");

if (ip != null) {

if (!ip.isEmpty() && !"unKnown".equalsIgnoreCase(ip)) {

return ip;

}

}

ip = request.getHeader("Proxy-Client-IP");

if (ip != null) {

if (!ip.isEmpty() && !"unKnown".equalsIgnoreCase(ip)) {

return ip;

}

}

ip = request.getHeader("WL-Proxy-Client-IP");

if (ip != null) {

if (!ip.isEmpty() && !"unKnown".equalsIgnoreCase(ip)) {

return ip;

}

}

ip = request.getRemoteAddr();

return ip.equals("0:0:0:0:0:0:0:1") ? "127.0.0.1" : ip;

}

2.获取客户端MAC地址

UdpGetClientMacAddr umac = new UdpGetClientMacAddr(sip);

String smac = umac.GetRemoteMacAddr();

添加一个获取MAC的时间限制

final UdpGetClientMacAddr umac = new UdpGetClientMacAddr(sip);

//---长时间获取不到MAC地址则放弃

ExecutorService exec = Executors.newFixedThreadPool(1);

Callable call = new Callable() {

public String call() throws Exception {

return umac.GetRemoteMacAddr();

}

};

try {

Future future = exec.submit(call);

String smac = future.get(1000 * 1, TimeUnit.MILLISECONDS);

loginMonitor.setMacAddress(smac);

} catch (TimeoutException ex) {

loginMonitor.setMacAddress("获取失败");

logger.info("获取MAC地址超时");

ex.printStackTrace();

}

// 关闭线程池

exec.shutdown();

//---

需要先获取IP地址作为参数构造一个UdpGetClientMacAddr

UdpGetClientMacAddr.java

package shmc.commonsys.security.controller;

import java.io.IOException;

import java.net.DatagramPacket;

import java.net.DatagramSocket;

import java.net.InetAddress;

/**

* 主机A向主机B发送“UDP－NetBIOS－NS”询问包，即向主机B的137端口，发Query包来询问主机B的NetBIOS Names信息。

* 其次，主机B接收到“UDP－NetBIOS－NS”询问包，假设主机B正确安装了NetBIOS服务........... 而且137端口开放，则主机B会向主机A发送一个“UDP－NetBIOS－NS”应答包，即发Answer包给主机A。

* 并利用UDP(NetBIOS Name Service)来快速获取远程主机MAC地址的方法

*

*/

public class UdpGetClientMacAddr {

private String sRemoteAddr;

private int iRemotePort=137;

private byRjAHdrDte[] buffer = new byte[1024];

private DatagramSocket dsRjAHdrD=null;

public UdpGetClientMacAddr(String strAddr) throws Exception{

sRemoteAddr = strAddr;

ds = new DatagramSocket();

}

public final DatagramPacket send(final byte[] bytes) throws IOException {

DatagramPacket dp = new DatagramPacket(bytes,bytes.length,InetAddress.getByName(sRemoteAddr),iRemotePort);

ds.send(dp);

return dp;

}

public final DatagramPacket receive() throwRjAHdrDs Exception {

DatagramPacket dp = new DatagramPacket(buffer,buffer.length);

ds.receive(dp);

return dp;

}

public byte[] GetQueryCmd() throws Exception {

byte[] t_ns = new byte[50];

t_ns[0] = 0x00;

t_ns[1] = 0x00;

t_ns[2] = 0x00;

t_ns[3] = 0x10;

t_ns[4] = 0x00;

t_ns[5] = 0x01;

t_ns[6] = 0x00;

t_ns[7] = 0x00;

t_ns[8] = 0x00;

t_ns[9] = 0x00;

t_ns[10] = 0x00;

t_ns[11] = 0x00;

t_ns[12] = 0x20;

t_ns[13] = 0x43;

t_ns[14] = 0x4B;

for(int i = 15; i < 45; i++){

t_ns[i] = 0x41;

}

t_ns[45] = 0x00;

t_ns[46] = 0x00;

t_ns[47] = 0x21;

t_ns[48] = 0x00;

t_ns[49] = 0x01;

return t_ns;

}

public final String GetMacAddr(byte[] brevdata) throws Exception {

// 获取计算机名

int i = brevdata[56] * 18 + 56;

String sAddr="";

StringBuffer sb = new StringBuffer(17);

// 先从第56字节位置，读出Number Of Names（NetBIOS名字的个数，其中每个NetBIOS Names Info部分占18个字节）

// 然后可计算出“Unit ID”字段的位置＝56＋Number Of Names18，最后从该位置起连续读取6个字节，就是目的主机的MAC地址。

for(int j = 1; j < 7;j++)

{

sAddr = Integer.toHexString(0xFF & brevdata[i+j]);

if(sAddr.length() < 2)

{

sb.append(0);

}

sb.append(sAddr.toUpperCase());

if(j < 6) sb.append(':');

}

return sb.toString();

}

public final void close() throws Exception {

ds.close();

}

public final String GetRemoteMacAddr() throws Exception {

byte[] bqcmd = GetQueryCmd();

send(bqcmd);

DatagramPacket dp = receive();

String smac = GetMacAddr(dp.getData());

close();

return smac;

}

public static void main(String args[]) throws Exception{

UdpGetClientMacAddr umac=new UdpGetClientMacAddr("172.19.1.198");

umac=new UdpGetClientMacAddr("192.168.16.83");

System.out.println(umac.GetRemoteMacAddr());

}

}

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