JAVA如何获取客户端IP地址和MAC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(); } 

 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; } 

 UdpGetClientMacAddr umac = new UdpGetClientMacAddr(sip); String smac = umac.GetRemoteMacAddr();

 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(); //--- 

 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()); } }