import com.imis.base.constant.CommonConstant;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;

import java.io.*;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * <p>
 * ComputerUniqueIdentificationUtil<br>
 * 计算机唯一识别实用程序
 * </p>
 *
 * @author XinLau
 * @version 1.0
 * @since 2020年10月10日 17:14
 */
@Slf4j
public class ComputerUniqueIdentificationUtil {

    /**
     * Windows
     */
    public static final String WINDOWS = "windows";
    /**
     * Linux
     */
    public static final String LINUX = "linux";
    /**
     * Unix
     */
    public static final String UNIX = "unix";
    /**
     * 正则表达式
     */
    public static final String REGEX = "\\b\\w+:\\w+:\\w+:\\w+:\\w+:\\w+\\b";

    /**
     * 获取 Windows 主板序列号
     *
     * @return String - 计算机主板序列号
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    private static String getWindowsMainBoardSerialNumber() {
        String result = "";
        try {
            File file = File.createTempFile("realhowto", ".vbs");
            file.deleteOnExit();
            FileWriter fw = new java.io.FileWriter(file);

            String vbs = "Set objWMIService = GetObject(\"winmgmts:\\\\.\\root\\cimv2\")\n"
                    + "Set colItems = objWMIService.ExecQuery _ \n" + "   (\"Select * from Win32_BaseBoard\") \n"
                    + "For Each objItem in colItems \n" + "    Wscript.Echo objItem.SerialNumber \n"
                    + "    exit for  ' do the first cpu only! \n" + "Next \n";

            fw.write(vbs);
            fw.close();
            Process p = Runtime.getRuntime().exec("cscript //NoLogo " + file.getPath());
            BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String line;
            while ((line = input.readLine()) != null) {
                result += line;
            }
            input.close();
        } catch (Exception e) {
            log.error("获取 Windows 主板信息错误", e);
        }
        return result.trim();
    }

    /**
     * 获取 Linux 主板序列号
     *
     * @return String - 计算机主板序列号
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    private static String getLinuxMainBoardSerialNumber() {
        String result = "";
        String maniBord_cmd = "dmidecode | grep 'Serial Number' | awk '{print $3}' | tail -1";
        Process p;
        try {
            // 管道
            p = Runtime.getRuntime().exec(new String[]{"sh", "-c", maniBord_cmd});
            BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String line;
            while ((line = br.readLine()) != null) {
                result += line;
                break;
            }
            br.close();
        } catch (IOException e) {
            log.error("获取 Linux 主板信息错误", e);
        }
        return result;
    }

    /**
     * 从字节获取 MAC
     *
     * @param bytes - 字节
     * @return String - MAC
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/12 8:55
     */
    private static String getMacFromBytes(byte[] bytes) {
        StringBuffer mac = new StringBuffer();
        byte currentByte;
        boolean first = false;
        for (byte b : bytes) {
            if (first) {
                mac.append("-");
            }
            currentByte = (byte) ((b & 240) >> 4);
            mac.append(Integer.toHexString(currentByte));
            currentByte = (byte) (b & 15);
            mac.append(Integer.toHexString(currentByte));
            first = true;
        }
        return mac.toString().toUpperCase();
    }

    /**
     * 获取 Windows 网卡的 MAC 地址
     *
     * @return String - MAC 地址
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    private static String getWindowsMACAddress() {
        InetAddress ip = null;
        NetworkInterface ni = null;
        List<String> macList = new ArrayList<String>();
        try {
            Enumeration<NetworkInterface> netInterfaces = (Enumeration<NetworkInterface>) NetworkInterface
                    .getNetworkInterfaces();
            while (netInterfaces.hasMoreElements()) {
                ni = (NetworkInterface) netInterfaces.nextElement();
                //  遍历所有 IP 特定情况，可以考虑用 ni.getName() 判断
                Enumeration<InetAddress> ips = ni.getInetAddresses();
                while (ips.hasMoreElements()) {
                    ip = (InetAddress) ips.nextElement();
                    // 非127.0.0.1
                    if (!ip.isLoopbackAddress() && ip.getHostAddress().matches("(\\d{1,3}\\.){3}\\d{1,3}")) {
                        macList.add(getMacFromBytes(ni.getHardwareAddress()));
                    }
                }
            }
        } catch (Exception e) {
            log.error("获取 Windows MAC 错误", e);
        }
        if (macList.size() > 0) {
            return macList.get(0);
        } else {
            return "";
        }
    }

    /**
     * 获取 Linux 网卡的 MAC 地址 （如果 Linux 下有 eth0 这个网卡）
     *
     * @return String - MAC 地址
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    private static String getLinuxMACAddressForEth0() {
        String mac = null;
        BufferedReader bufferedReader = null;
        Process process = null;
        try {
            // Linux下的命令，一般取eth0作为本地主网卡
            process = Runtime.getRuntime().exec("ifconfig eth0");
            // 显示信息中包含有 MAC 地址信息
            bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line = null;
            int index = -1;
            while ((line = bufferedReader.readLine()) != null) {
                // 寻找标示字符串[hwaddr]
                index = line.toLowerCase().indexOf("hwaddr");
                if (index >= 0) {
                    // // 找到并取出 MAC 地址并去除2边空格
                    mac = line.substring(index + "hwaddr".length() + 1).trim();
                    break;
                }
            }
        } catch (IOException e) {
            log.error("获取 Linux MAC 信息错误", e);
        } finally {
            try {
                if (bufferedReader != null) {
                    bufferedReader.close();
                }
            } catch (IOException e1) {
                log.error("获取 Linux MAC 信息错误", e1);
            }
            bufferedReader = null;
            process = null;
        }
        return mac;
    }

    /**
     * 获取 Linux 网卡的 MAC 地址
     *
     * @return String - MAC 地址
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    private static String getLinuxMACAddress() {
        String mac = null;
        BufferedReader bufferedReader = null;
        Process process = null;
        try {
            // Linux下的命令 显示或设置网络设备
            process = Runtime.getRuntime().exec("ifconfig");
            // 显示信息中包含有 MAC 地址信息
            bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line = null;
            int index = -1;
            while ((line = bufferedReader.readLine()) != null) {
                Pattern pat = Pattern.compile(REGEX);
                Matcher mat = pat.matcher(line);
                if (mat.find()) {
                    mac = mat.group(0);
                }
            }
        } catch (IOException e) {
            log.error("获取 Linux MAC 信息错误", e);
        } finally {
            try {
                if (bufferedReader != null) {
                    bufferedReader.close();
                }
            } catch (IOException e1) {
                log.error("获取 Linux MAC 信息错误", e1);
            }
            bufferedReader = null;
            process = null;
        }
        return mac;
    }

    /**
     * 获取 Windows 的 CPU 序列号
     *
     * @return String - CPU 序列号
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    private static String getWindowsProcessorIdentification() {
        String result = "";
        try {
            File file = File.createTempFile("tmp", ".vbs");
            file.deleteOnExit();
            FileWriter fw = new java.io.FileWriter(file);
            String vbs = "Set objWMIService = GetObject(\"winmgmts:\\\\.\\root\\cimv2\")\n"
                    + "Set colItems = objWMIService.ExecQuery _ \n" + "   (\"Select * from Win32_Processor\") \n"
                    + "For Each objItem in colItems \n" + "    Wscript.Echo objItem.ProcessorId \n"
                    + "    exit for  ' do the first cpu only! \n" + "Next \n";

            fw.write(vbs);
            fw.close();
            Process p = Runtime.getRuntime().exec("cscript //NoLogo " + file.getPath());
            BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String line;
            while ((line = input.readLine()) != null) {
                result += line;
            }
            input.close();
            file.delete();
        } catch (Exception e) {
            log.error("获取 Windows CPU 信息错误", e);
        }
        return result.trim();
    }

    /**
     * 获取 Linux 的 CPU 序列号
     *
     * @return String - CPU 序列号
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    private static String getLinuxProcessorIdentification() {
        String result = "";
        String CPU_ID_CMD = "dmidecode";
        BufferedReader bufferedReader = null;
        Process p = null;
        try {
            // 管道
            p = Runtime.getRuntime().exec(new String[]{"sh", "-c", CPU_ID_CMD});
            bufferedReader = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String line = null;
            int index = -1;
            while ((line = bufferedReader.readLine()) != null) {
                index = line.toLowerCase().indexOf("uuid");
                if (index >= 0) {
                    result = line.substring(index + "uuid".length() + 1).trim();
                    break;
                }
            }
        } catch (IOException e) {
            log.error("获取 Linux CPU 信息错误", e);
        }
        return result.trim();
    }

    /**
     * 获取当前计算机操作系统名称 例如:windows,Linux,Unix等.
     *
     * @return String - 计算机操作系统名称
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    public static String getOSName() {
        return System.getProperty("os.name").toLowerCase();
    }

    /**
     * 获取当前计算机操作系统名称前缀 例如:windows,Linux,Unix等.
     *
     * @return String - 计算机操作系统名称
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    public static String getOSNamePrefix() {
        String name = getOSName();
        if (name.startsWith(WINDOWS)) {
            return WINDOWS;
        } else if (name.startsWith(LINUX)) {
            return LINUX;
        } else if (name.startsWith(UNIX)) {
            return UNIX;
        } else {
            return CommonConstant.EMPTY;
        }
    }

    /**
     * 获取当前计算机主板序列号
     *
     * @return String - 计算机主板序列号
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    public static String getMainBoardSerialNumber() {
        switch (getOSNamePrefix()) {
            case WINDOWS:
                return getWindowsMainBoardSerialNumber();
            case LINUX:
                return getLinuxMainBoardSerialNumber();
            default:
                return CommonConstant.EMPTY;
        }
    }

    /**
     * 获取当前计算机网卡的 MAC 地址
     *
     * @return String - 网卡的 MAC 地址
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    public static String getMACAddress() {
        switch (getOSNamePrefix()) {
            case WINDOWS:
                return getWindowsMACAddress();
            case LINUX:
                String macAddressForEth0 = getLinuxMACAddressForEth0();
                if (ConvertUtils.isEmpty(macAddressForEth0)) {
                    macAddressForEth0 = getLinuxMACAddress();
                }
                return macAddressForEth0;
            default:
                return CommonConstant.EMPTY;
        }
    }

    /**
     * 获取当前计算机的 CPU 序列号
     *
     * @return String - CPU 序列号
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/10 17:15
     */
    public static String getCPUIdentification() {
        switch (getOSNamePrefix()) {
            case WINDOWS:
                return getWindowsProcessorIdentification();
            case LINUX:
                return getLinuxProcessorIdentification();
            default:
                return CommonConstant.EMPTY;
        }
    }

    /**
     * 获取计算机唯一标识
     *
     * @return ComputerUniqueIdentification - 计算机唯一标识
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/14 8:50
     */
    public static ComputerUniqueIdentification getComputerUniqueIdentification() {
        return new ComputerUniqueIdentification(getOSNamePrefix(), getMainBoardSerialNumber(), getMACAddress(), getCPUIdentification());
    }

    /**
     * 获取计算机唯一标识
     *
     * @return String - 计算机唯一标识
     * @author XinLau
     * @creed The only constant is change ! ! !
     * @since 2020/10/14 8:50
     */
    public static String getComputerUniqueIdentificationString() {
        return getComputerUniqueIdentification().toString();
    }

    /**
     * 计算机唯一标识
     */
    @Data
    private static class ComputerUniqueIdentification {
        private String namePrefix;
        private String mainBoardSerialNumber;
        private String MACAddress;
        private String CPUIdentification;

        public ComputerUniqueIdentification(String namePrefix, String mainBoardSerialNumber, String MACAddress, String CPUIdentification) {
            this.namePrefix = namePrefix;
            this.mainBoardSerialNumber = mainBoardSerialNumber;
            this.MACAddress = MACAddress;
            this.CPUIdentification = CPUIdentification;
        }

        @Override
        public String toString() {
            return new StringBuilder().append('{')
                    .append("\"namePrefix=\":\"").append(namePrefix).append("\",")
                    .append("\"mainBoardSerialNumber=\":\"").append(mainBoardSerialNumber).append("\",")
                    .append("\"MACAddress=\":\"").append(MACAddress).append("\",")
                    .append("\"CPUIdentification=\":\"").append(CPUIdentification)
                    .append("\"}").toString();
        }
    }

}

在项目中我们通常会用到手机的唯一标识码传给服务器用于统计用户量什么的，我们有可能使用手机的IMEI或者AndroidID、Mac地址等之类的作为标识，但是这些标识对于有的手机可能获取不到导致唯一标识上传失败，这一类的问题我们应该都遇到过，这类问题其实也简单，那就是把IMEI，AndroidID，Mac地址等结合然后通过加密进行上传，三种标识相结合，总有一种会存在，所以不用怕获取不到唯一标识，下面是我在网上看到的一种方法，在这里记录下，也希望能帮到大家：

public static String getDevUUid(){
    Context context = BaseAplication.getInstance();
    String imei = "";
    String androidId = "";
    String macAddress = "";

    TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(TELEPHONY_SERVICE);
    if (telephonyManager != null) {
        imei = telephonyManager.getDeviceId();
        Log.e("imei---",imei);
    }
    ContentResolver contentResolver = context.getContentResolver();
    if (contentResolver != null) {
        androidId = Settings.Secure.getString(contentResolver, Settings.Secure.ANDROID_ID);
        Log.e("androidId---",androidId);
    }
    WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    if (wifiManager != null) {
        macAddress = wifiManager.getConnectionInfo().getMacAddress();
        Log.e("macAddress---",macAddress);
    }

    StringBuilder uidBuilder = new StringBuilder();
    if (imei != null) {
        uidBuilder.append(imei);
    }
    if (androidId != null) {
        uidBuilder.append(androidId);
    }
    if (macAddress != null) {
        uidBuilder.append(macAddress);
    }
    return toMd5(uidBuilder.toString());
}

/**
 * 加密
 * @param plaintext 明文
 * @return ciphertext 密文
 */
public final static String  toMd5(String plaintext) {
    char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
            'a', 'b', 'c', 'd', 'e', 'f' };
    try {
        byte[] btInput = plaintext.getBytes();
        // 获得MD5摘要算法的 MessageDigest 对象
        MessageDigest mdInst = MessageDigest.getInstance("MD5");
        // 使用指定的字节更新摘要
        mdInst.update(btInput);
        // 获得密文
        byte[] md = mdInst.digest();
        // 把密文转换成十六进制的字符串形式
        int j = md.length;
        char str[] = new char[j * 2];
        int k = 0;
        for (int i = 0; i < j; i++) {
            byte byte0 = md[i];
            str[k++] = hexDigits[byte0 >>> 4 & 0xf];
            str[k++] = hexDigits[byte0 & 0xf];
        }
        return new String(str);
    } catch (Exception e) {
        return null;
    }
}

初衷

结合上一篇博文，我需要拿到一台主机的唯一标识，并且这个标识是不可修改的，经查阅发现，MAC地址虽然是唯一标识，但是可修改，所以不可采用。现在选取当前主机唯一标识——CPU序列，本篇说下LINUX系统和WINSOWS系统获取CPU序列，顺带说下MAC地址的方法。

思路

主要思路就是使用Runtime.getRuntime().exec()执行命令来获取参数。毕竟是Java代码，要考虑多个平台的问题，而且linux和windows系统的命令又不同，所以分出处理。不多说，直接上代码：

    /**
     * 获取当前系统CPU序列，可区分linux系统和windows系统
     */
    public static String getCpuId() throws Exception {
        String cpuId;
        // 获取当前操作系统名称
        String os = System.getProperty("os.name");
        os = os.toUpperCase();
        System.out.println(os);

        // linux系统用Runtime.getRuntime().exec()执行 dmidecode -t processor 查询cpu序列
        // windows系统用 wmic cpu get ProcessorId 查看cpu序列
        if ("LINUX".equals(os)) {
            cpuId = getLinuxCpuId("dmidecode -t processor | grep 'ID'", "ID", ":");
        } else {
            cpuId = getWindowsCpuId();
        }
        return cpuId.toUpperCase().replace(" ", "");
    }
    
    /**
     * 获取linux系统CPU序列
     */
    public static String getLinuxCpuId(String cmd, String record, String symbol) throws Exception {
        String execResult = executeLinuxCmd(cmd);
        String[] infos = execResult.split("\n");
        for (String info : infos) {
            info = info.trim();
            if (info.indexOf(record) != -1) {
                info.replace(" ", "");
                String[] sn = info.split(symbol);
                return sn[1];
            }
        }
        return null;
    }

    public static String executeLinuxCmd(String cmd) throws Exception {
        Runtime run = Runtime.getRuntime();
        Process process;
        process = run.exec(cmd);
        InputStream in = process.getInputStream();
        BufferedReader bs = new BufferedReader(new InputStreamReader(in));
        StringBuffer out = new StringBuffer();
        byte[] b = new byte[8192];
        for (int n; (n = in.read(b)) != -1; ) {
            out.append(new String(b, 0, n));
        }
        in.close();
        process.destroy();
        return out.toString();
    }
    
    /**
     * 获取windows系统CPU序列
     */
    public static String getWindowsCpuId() throws Exception {
        Process process = Runtime.getRuntime().exec(
                new String[]{"wmic", "cpu", "get", "ProcessorId"});
        process.getOutputStream().close();
        Scanner sc = new Scanner(process.getInputStream());
        sc.next();
        String serial = sc.next();
        return serial;
    }