本文介紹了JAVA如何獲取客戶端IP地址和MAC地址 ，分享給大家，具體如下：
1.獲取客戶端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();} |
為什么不直接使用request.getRemoteAddr()；而要在之前判斷兩個請求頭"X-Forwarded-For"和"X-Real-IP"
X-Forwarded-For: client1, proxy1, proxy2, proxy3
其中的值通過一個 逗號+空格 把多個IP地址區分開, 最左邊(client1)是最原始客戶端的IP地址, 代理服務器每成功收到一個請求，就把請求來源IP地址添加到右邊。
所有我們只取第一個IP地址
X-Real-IP，一般只記錄真實發出請求的客戶端IP
解決用localhost訪問ip為0:0:0:0:0:0:0:1的問題
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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; } } 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.獲取客戶端MAC地址
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UdpGetClientMacAddr umac = new UdpGetClientMacAddr(sip);String smac = umac.GetRemoteMacAddr(); |
添加一個獲取MAC的時間限制
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final UdpGetClientMacAddr umac = new UdpGetClientMacAddr(sip);//---長時間獲取不到MAC地址則放棄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("獲取失敗"); logger.info("獲取MAC地址超時"); ex.printStackTrace();}// 關閉線程池 exec.shutdown();//--- |
需要先獲取IP地址作為參數構造一個UdpGetClientMacAddr
UdpGetClientMacAddr.java
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package shmc.commonsys.security.controller;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress; /** * 主機A向主機B發送“UDP－NetBIOS－NS”詢問包，即向主機B的137端口，發Query包來詢問主機B的NetBIOS Names信息。 * 其次，主機B接收到“UDP－NetBIOS－NS”詢問包，假設主機B正確安裝了NetBIOS服務........... 而且137端口開放，則主機B會向主機A發送一個“UDP－NetBIOS－NS”應答包，即發Answer包給主機A。 * 并利用UDP(NetBIOS Name Service)來快速獲取遠程主機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 { // 獲取計算機名 int i = brevdata[56] * 18 + 56; String sAddr=""; StringBuffer sb = new StringBuffer(17); // 先從第56字節位置，讀出Number Of Names（NetBIOS名字的個數，其中每個NetBIOS Names Info部分占18個字節） // 然后可計算出“Unit ID”字段的位置＝56＋Number Of Names×18，最后從該位置起連續讀取6個字節，就是目的主機的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()); } } |
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：http://www.cnblogs.com/huangjian2/p/6238236.html
