JAVA获取客户端IP地址和MAC地址

来源：互联网发布：c语言求出100以内素数编辑：程序博客网时间：2024/04/29 22:11

本文转载：https://www.cnblogs.com/huangjian2/p/6238236.html

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<String> call = new Callable<String>() {    public String call() throws Exception {        return umac.GetRemoteMacAddr();    }};try {    Future<String> 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 byte[] buffer = new byte[1024];      private DatagramSocket ds=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() throws 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 Names×18，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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