myeclipse工具注册序列号程序

import java.io.BufferedReader;



import java.io.IOException;



import java.io.InputStreamReader;



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.";



public String getSerial(String userId, String licenseNum) {



   java.util.Calendar cal = java.util.Calendar.getInstance();



   cal.add(1, 3);



   cal.add(6, -1);



   java.text.NumberFormat nf = new java.text.DecimalFormat("000");



   licenseNum = nf.format(Integer.valueOf(licenseNum));



   String verTime = new StringBuilder("-").append(



     new java.text.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 MyEclipseGen() {



   super();



}



public static void main(String[] args) {



   try {



    System.out.println("please input register name:");



    BufferedReader reader = new BufferedReader(new InputStreamReader(



      System.in));



    String userId = null;



    userId = reader.readLine();



    MyEclipseGen myeclipsegen = new MyEclipseGen();



    String res = myeclipsegen.getSerial(userId, "5");



    System.out.println("Serial:" + res);



    reader.readLine();



   } catch (IOException ex) {



   }



}



}