Java|java教程
Java,客户端,地址
Java-java教程
本篇文章主要介绍了JAVA如何获取客户端IP地址和MAC地址非常具有实用价值，这里整理了详细的代码，需要的朋友可以参考下
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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：
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1.获取客户端IP地址
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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 monsys.security.controller;import java.io.IOException;import .DatagramPacket;import .DatagramSocket;import .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()); } }
