Method by which java gets the mac address based on the local IP

This article shares the specific code of java getting mac address according to local IP for your reference. The specific content is as follows

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;

public class MacAddress {

 /**
 * @param args
 * @throws UnknownHostException 
 * @throws SocketException 
 */
 public static void main(String[] args) throws UnknownHostException, SocketException {

 InetAddress ia = InetAddress.getLocalHost();
 System.out.println(ia);
 getLocalMac(ia);
 }
 private static void getLocalMac(InetAddress ia) throws SocketException {
 // TODO Auto-generated method stub
 // Get network card, get address 
 byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();
 
 System.out.println("mac Array length: "+mac.length);
 StringBuffer sb = new StringBuffer("");
 for(int i=0; i<mac.length; i++) {
  if(i!=0) {
  sb.append("-");
  }
  // Bytes converted to integers 
  int temp = mac[i]&0xff;
  String str = Integer.toHexString(temp);
  System.out.println(" every 8 position :"+str);
  if(str.length()==1) {
  sb.append("0"+str);
  }else {
  sb.append(str);
  }
 }
 System.out.println(" This machine MAC address :"+sb.toString().toUpperCase());
 }
}

The following method is to get the client request address

public String getClientIp(HttpServletRequest request) {
 String ip = request.getHeader("x-forwarded-for");
 if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
  ip = request.getHeader("Proxy-Client-IP");

 }

 if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {

  ip = request.getHeader("WL-Proxy-Client-IP");

 }

 if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {

  ip = request.getRemoteAddr();

 }
 if(ip.trim().contains(",")){
  String [] ips=ip.split(",");
  ip=ips[0];
 }
 return ip;
 }