半步多 玄玉的博客

MyEclipse6.5.1注册算法

2012-10-23
玄玉

package com.jadyer.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;

/**
 * MyEclipse_6.5.1GA_E3.3.2_Installer_注册算法
 * Created by 玄玉<http://jadyer.cn/> on 2012/10/23 09:48.
 */
public class MyEclipseGen {
    private static final String LL = "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.";

    private String getSerial(String userId, String licenseNum) {
        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 = new StringBuilder("-").append(new SimpleDateFormat("yyMMdd").format(cal.getTime())).append("0").toString();
        String type = "YE3MP-";
        String need = new StringBuilder(userId.substring(0, 1)).append(type).append("300").append(licenseNum).append(verTime).toString();
        String dx = new StringBuilder(need).append(LL).append(userId).toString();
        int suf = this.decode(dx);
        String code = new StringBuilder(need).append(String.valueOf(suf)).toString();
        return this.change(code);
    }

    private int decode(String s) {
        int i;
        char[] ac;
        int j;
        int k;
        i = 0;
        ac = s.toCharArray();
        j = 0;
        k = ac.length;
        while(j < k){
            i = (31*i) + ac[j];
            j++;
        }
        return Math.abs(i);
    }

    private String change(String s) {
        byte[] abyte0;
        char[] ac;
        int i;
        int k;
        int j;
        abyte0 = s.getBytes();
        ac = new char[s.length()];
        i = 0;
        k = abyte0.length;
        while(i < k){
            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;
            i++;
        }
        return String.valueOf(ac);
    }

    public static void main(String[] args) throws IOException {
        System.out.println("Please Input Register Name:");
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String serialNo = new MyEclipseGen().getSerial(br.readLine(), "1");
        br.close();
        System.out.println("Your SerialNo Is:[" + serialNo + "]");
    }
}

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