com.moon.core.util.MacUtil Maven / Gradle / Ivy

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package com.moon.core.util;

import com.moon.core.lang.ThrowUtil;
import com.moon.core.net.IPUtil;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.function.Supplier;

/**
 * @author moonsky
 */
public final class MacUtil {

    private MacUtil() { ThrowUtil.noInstanceError(); }

    public static String getMacAddress() { return LocalMac.HEX.get(); }

    public static String getDecimalMacAddress() { return LocalMac.DECIMAL.get(); }

    public enum LocalMac implements Supplier {
        /**
         * 十六进制
         */
        HEX,
        /**
         * 十进制
         */
        DECIMAL {
            @Override
            public String get() { return getAddress(true); }
        };

        private final InetAddress address = IPUtil.getLocalhost();

        @Override
        public String get() { return getAddress(false); }

        byte[] getMac() {
            try {
                return NetworkInterface.getByInetAddress(address).getHardwareAddress();
            } catch (SocketException e) {
                throw new IllegalStateException();
            }
        }


        String getAddress(boolean decimal) {
            final byte[] mac = getMac();
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < mac.length; i++) {
                int temp = mac[i] & 0xff;
                String str;
                if (decimal) {
                    str = Integer.toString(temp);
                } else {
                    if (i > 0) {
                        sb.append('-');
                    }
                    str = Integer.toHexString(temp);
                }

                if (str.length() == 1) {
                    sb.append("0");
                }
                sb.append(str);
            }
            return sb.toString().toUpperCase();
        }
    }
}