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package com.lone.common.util;

import java.net.*;

/**
 * 通过IP,获取机器的MAC地址
 * @author zhangdaihao
 *
 */
public class IpConfigMac {

//	public static void main(String[] arguments) throws Exception {
//		InetAddress ia = InetAddress.getLocalHost();// 获取本地IP对象
//		System.out.println(ia);
//		System.out.println("MAC ......... " + getMACAddress(ia));
//	}

	// 获取MAC地址的方法
	private static String getMACAddress(InetAddress ia) throws Exception {
		// 获得网络接口对象(即网卡),并得到mac地址,mac地址存在于一个byte数组中。
		byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();
		// 下面代码是把mac地址拼装成String
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < mac.length; i++) {
			if (i != 0) {
				sb.append("-");
			}
			// mac[i] & 0xFF 是为了把byte转化为正整数
			String s = Integer.toHexString(mac[i] & 0xFF);
			sb.append(s.length() == 1 ? 0 + s : s);
		}
		// 把字符串所有小写字母改为大写成为正规的mac地址并返回
		return sb.toString().toUpperCase();
	}
}




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