myeclipse 6.5 blue edition 破解方法

软件过期了的同学们，把下面代码运行了，结果是破解密码，破解用户名为:jationxiaozi

 

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;

public class Crack {
    public static final void main(String[] args){
        String id="jationxiaozi";
        String num="999";
        System.out.println(getSerial(id,"100",num,false));
    }
    public static String getSerial(String userId, String version,
            String licenseNum, boolean selected) {
        Calendar cal = Calendar.getInstance();
        cal.add(1, 3);
        cal.add(6, -1);
        NumberFormat nf = new DecimalFormat("000");
        licenseNum = nf.format(Integer.valueOf(licenseNum));
        String verTime = selected ? (new StringBuffer("-")).append(
                (new SimpleDateFormat("yyMMdd")).format(cal.getTime())).append(
                "0").toString() : "-1012310";
        String type = "YE3MB-";
        String need = (new StringBuffer(String.valueOf(userId.substring(0, 1))))
                .append(type).append(version).append(licenseNum)
                .append(verTime).toString();
        String dx = (new StringBuffer(String.valueOf(need)))
                .append(
                        "Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself.")

                        .append(userId).toString();
        int suf = decode(dx);
        String code = (new StringBuffer(String.valueOf(need))).append(
                String.valueOf(suf)).toString();
        return change(code);
    }

    private static int decode(String s) {
        int i = 0;
        char ac[] = s.toCharArray();
        int j = 0;
        for (int k = ac.length; j < k; j++)
            i = 31 * i + ac[j];

        return Math.abs(i);
    }

    private static String change(String s) {
        byte abyte0[] = s.getBytes();
        char ac[] = new char[s.length()];
        int i = 0;
        for (int k = abyte0.length; i < k; i++) {
            int j = abyte0[i];
            if (j >= 48 && j <= 57)
                j = ((j - 48) + 5) % 10 + 48;
            else if (j >= 65 && j <= 90)
                j = ((j - 65) + 13) % 26 + 65;
            else if (j >= 97 && j <= 122)
                j = ((j - 97) + 13) % 26 + 97;
            ac[i] = (char) j;
        }

        return String.valueOf(ac);
    }
}