JAVA獲取客戶端IP地址和MAC地址

1.獲取客戶端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();
}

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

 

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

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

添加一個獲取MAC的時間限制

 

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

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。 
 * 並利用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());  
    }  
}