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;
    }