com.baidu.rigel.biplatform.cache.util.MacAddressUtil.java Source code

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Here is the source code for com.baidu.rigel.biplatform.cache.util.MacAddressUtil.java

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/**
 * Copyright (c) 2014 Baidu, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.baidu.rigel.biplatform.cache.util;

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

import org.apache.commons.lang.StringUtils;

/** 
 *  
 * @author xiaoming.chen
 * @version  201539 
 * @since jdk 1.8 or after
 */
public class MacAddressUtil {

    /** 
     * getMachineNetworkFlag ?MACIP?MAC
     * @param ia
     * @return
     * @throws SocketException
     * @throws UnknownHostException
     */
    public static String getMachineNetworkFlag(InetAddress ia) throws SocketException, UnknownHostException {
        if (ia == null) {
            ia = InetAddress.getLocalHost();
        }
        String machineFlag = getMacAddress(ia);
        if (StringUtils.isBlank(machineFlag)) {
            machineFlag = getIpAddress(ia);
        }
        return machineFlag;
    }

    /** 
     * ??mac???mac?
     * @param ia
     * @throws SocketException
     * @throws UnknownHostException 
     */
    public static String getMacAddress(InetAddress ia) throws SocketException, UnknownHostException {
        if (ia == null) {
            ia = InetAddress.getLocalHost();
        }
        //????
        byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();
        StringBuffer sb = new StringBuffer("");
        for (int i = 0; i < mac.length; i++) {
            if (i != 0) {
                sb.append("-");
            }
            //?
            int temp = mac[i] & 0xff;
            String str = Integer.toHexString(temp).toUpperCase();
            if (str.length() == 1) {
                sb.append("0" + str);
            } else {
                sb.append(str);
            }
        }
        return sb.toString();
    }

    /** 
     * ??ip???ip?
     * @param ia
     * @throws SocketException
     * @throws UnknownHostException 
     */
    public static String getIpAddress(InetAddress ia) throws UnknownHostException {
        if (ia == null) {
            ia = InetAddress.getLocalHost();
        }

        return ia.getHostAddress();
    }

}