Java获取机器码

1.获取CPU序列号

（1）windows系统第一种获取方式

public class Test{
    public static void main(String[] args) throws IOException {
        System.out.println(getCPUSerial());
        System.exit(0);
    }
    
    /**获取本机CPU信息
     */
    private static String getCPUSerial() {
        String result = "";
        try {
            File file = File.createTempFile("tmp", ".vbs");//创建临时文件，路径为C:Documents and SettingsAdministratorLocal SettingsTemp
            file.deleteOnExit();
            FileWriter fw = new java.io.FileWriter(file);
            //是有vbs脚本语言，获取CPU唯一ID
            //表示程序出现运行时错误时，会继续运行，不中断
            StringBuilder sb = new StringBuilder("On Error Resume Next 

");
            //表示本机
            sb.append("strComputer = "."  
");
            //使用GetObject函数获取本机信息赋值给objWMIService
            sb.append("Set objWMIService = GetObject("winmgmts:" _ 
");
            sb.append("    & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2") 
");
            sb.append("Set colItems = objWMIService.ExecQuery("Select * from Win32_Processor")  
 ");
            //使用for循环取出CPU信息
            sb.append("For Each objItem in colItems
 " + "    Wscript.Echo objItem.ProcessorId  
 ");
            sb.append("    exit for  ' do the first cpu only! 
");
            sb.append("Next");

            fw.write(sb.toString());
            fw.close();
            Process p = Runtime.getRuntime().exec("cscript //NoLogo //T:10 " + 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) {
            e.fillInStackTrace();
        }
        return result;
    }
}

　　注：这种方式，即便是遇到错误也会执行下去。

（2）windows系统第二种获取方式

public class Test{
    public static void main(String[] args) throws IOException {
        try {
            Process process = Runtime.getRuntime().exec(new String[] { "wmic", "cpu", "get", "ProcessorId" });
            process.getOutputStream().close();
            Scanner sc = new Scanner(process.getInputStream());
            String serial = sc.next();
            System.out.println(serial);
        } catch (IOException e) {  
            e.printStackTrace();  
        }
    }
}

　　注：这种方式获取比第一种要快。

（3）linux系统获取方式

public class Test{
    public static void main(String[] args) throws IOException {
        System.out.println(getCPUSerial());
    }
    /**获取本机CPU信息
     */
    private static String getCPUSerial() {
        String result = "";
        try {
            Process process = Runtime.getRuntime().exec("sudo dmidecode -s system-uuid");
            InputStream in;
            BufferedReader br;
            in = process.getInputStream();
            br = new BufferedReader(new InputStreamReader(in));
            while (in.read() != -1) {
                result = br.readLine();
            }
            br.close();
            in.close();
            process.destroy();
        } catch (Throwable e) {
            e.printStackTrace();
        }
        return result;
    }
}

　　注：需要root用户来执行，如果使用普通用户执行的话需要输入当前用户的密码（普通用户不支持dmidecode命令 因为没权限）

2.根据CPU序列号获取机器码

　　注：因为是在机器注册时使用，需要输入，所以就没有用MD5、RSA加密。

public class Test{
    public static void main(String[] args) throws IOException {
        System.out.println(validate("BFCBFBFF000306C9"));
    }
    
    public static String validate(String CPUSerial) {
        if (CPUSerial == null || "".equals(CPUSerial.trim())) {
            return "";
        }
        byte[] snBytes = CPUSerial.getBytes();
        int sum = 0;
        for (byte snByte : snBytes) {
            sum += snByte;
        }
        int B = sum % 8;
        String text = Integer.toHexString(sum * sum);
        int length = text.length();
        String resultTemp = text.substring(0, 2) + text.substring(length - 2, length) + B;
        String result = "";
        char[] charArray = resultTemp.toCharArray();
        for (char c : charArray) {
            if (c == 0x31 || c == 0x3F || c == 0x4F) {
                c++;
            }
            result += c;
        }
        return result.toUpperCase();
    }
}

　　自定义简易的机器码，献丑了。