barcodelicensekey.java

遗传算法改进神经网络源程序 该小程序可以添加条形码功能到你的网页或者applet上,这个applet把大写字母和数字转换为标准的条形码。

package com.bokai.barcodes;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

class BarcodeLicenseKey
{

    BarcodeLicenseKey()
    {
    }

    private static char[] binaryToPrintableAZ(byte abyte0[])
    {
        char ac[] = new char[abyte0.length];
        for(int j = 0; j < abyte0.length; j++)
        {
            int i = 0xf & abyte0[j];
            ac[j] = (char)(65 + i % 26);
        }

        return ac;
    }

    private static synchronized String encrypt(String s)
        throws NoSuchAlgorithmException, UnsupportedEncodingException
    {
        MessageDigest messagedigest = null;
        try
        {
            messagedigest = MessageDigest.getInstance("SHA");
        }
        catch(NoSuchAlgorithmException nosuchalgorithmexception)
        {
            throw nosuchalgorithmexception;
        }
        messagedigest.update(stringToBytes(s));
        byte abyte0[] = messagedigest.digest();
        return new String(binaryToPrintableAZ(abyte0));
    }

    public static String generateKey(String s, String s1, String s2, int i, int j, int k)
        throws NoSuchAlgorithmException, UnsupportedEncodingException
    {
        if(i != 0x263fc)
            return null;
        StringBuffer stringbuffer = new StringBuffer(s);
        stringbuffer.append('c');
        stringbuffer.append('1');
        stringbuffer.append('u');
        stringbuffer.append('0');
        stringbuffer.append('p');
        stringbuffer.append('5');
        stringbuffer.append('e');
        stringbuffer.append('8');
        stringbuffer.append('r');
        stringbuffer.append('0');
        stringbuffer.append('t');
        stringbuffer.append('i');
        stringbuffer.append('n');
        stringbuffer.append('o');
        stringbuffer.append(s1);
        if(s2.length() > 0)
        {
            stringbuffer.append(';');
            stringbuffer.append(s2);
        }
        String s3 = "";
        try
        {
            s3 = encrypt(stringbuffer.toString());
        }
        catch(NoSuchAlgorithmException nosuchalgorithmexception)
        {
            throw nosuchalgorithmexception;
        }
        catch(UnsupportedEncodingException unsupportedencodingexception)
        {
            throw unsupportedencodingexception;
        }
        return s3;
    }

    private static byte[] stringToBytes(String s)
    {
        char ac[] = s.toCharArray();
        byte abyte0[] = new byte[ac.length * 2];
        for(int i = 0; i < ac.length; i++)
        {
            abyte0[i * 2] = (byte)ac[i];
            abyte0[i * 2 + 1] = (byte)(ac[i] >> 8);
        }

        return abyte0;
    }

    static String stringToUnicodeEscapes(String s)
    {
        StringBuffer stringbuffer = new StringBuffer();
        for(int i = 0; i < s.length(); i++)
        {
            int j = 0xffff & s.charAt(i);
            if((j & 0xff80) != 0)
            {
                stringbuffer.append("\\u");
                String s1 = Integer.toHexString(j >> 12 & 0xf);
                stringbuffer.append(s1.substring(0, 1));
                s1 = Integer.toHexString(j >> 8 & 0xf);
                stringbuffer.append(s1.substring(0, 1));
                s1 = Integer.toHexString(j >> 4 & 0xf);
                stringbuffer.append(s1.substring(0, 1));
                s1 = Integer.toHexString(j & 0xf);
                stringbuffer.append(s1.substring(0, 1));
            } else
            {
                stringbuffer.append(s.charAt(i));
            }
        }

        return stringbuffer.toString();
    }
}