java根据本地Ip获取mac地址

 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
         //获取网卡，获取地址
         byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();

         System.out.println("mac数组长度："+mac.length);
         StringBuffer sb = new StringBuffer("");
         for(int i=0; i<mac.length; i++) {
             if(i!=0) {
                 sb.append("-");
             }
             //字节转换为整数
             int temp = mac[i]&0xff;
             String str = Integer.toHexString(temp);
             System.out.println("每8位:"+str);
             if(str.length()==1) {
                 sb.append("0"+str);
             }else {
                 sb.append(str);
             }
         }
         System.out.println("本机MAC地址:"+sb.toString().toUpperCase());
     }
 }

下面这个方法是获取客户端请求地址

    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;
    }