基于J2ME的MD5算法类

        {
            abyte0[k] = (byte)(int)(al[j] & 255L);
            abyte0[k + 1] = (byte)(int)(al[j] >>> 8 & 255L);
            abyte0[k + 2] = (byte)(int)(al[j] >>> 16 & 255L);
            abyte0[k + 3] = (byte)(int)(al[j] >>> 24 & 255L);
            j++;
        }
    }
    private void Decode(long al[], byte abyte0[], int i)
    {
        int j = 0;
        for(int k = 0; k < i; k += 4)
        {
            al[j] = b2iu(abyte0[k]) | b2iu(abyte0[k + 1]) << 8 | b2iu(abyte0[k + 2]) << 16 | b2iu(abyte0[k + 3]) << 24;
            j++;
        }
    }
    public static long b2iu(byte byte0)
    {
        return byte0 >= 0 ? byte0 : byte0 & 0xff;
    }
    public static String byteHEX(byte byte0)
    {//字节到十六进制的ASCII码转换
        char ac[] = {
            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
            'A', 'B', 'C', 'D', 'E', 'F'
        };
        char ac1[] = new char[2];
        ac1[0] = ac[byte0 >>> 4 & 0xf];
        ac1[1] = ac[byte0 & 0xf];
        String s = new String(ac1);
        return s;
    }
    public static String toMD5(String s)
    {
        MD5 md5 = new MD5();
        return md5.getMD5ofStr(s);
    }
}