1 package com.qcf.test; 2  3 import java.io.BufferedReader; 4 import java.io.IOException; 5 import java.io.InputStreamReader; 6 public class MyEclipseGen { 7   8     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."; 9  10     public String getSerial(String userId, String licenseNum) {11  12     java.util.Calendar cal = java.util.Calendar.getInstance();13 cal.add(1, 3);14  cal.add(6, -1);15  java.text.NumberFormat nf = new java.text.DecimalFormat("000");16  licenseNum = nf.format(Integer.valueOf(licenseNum));17  String verTime = new StringBuilder("-").append(18  new java.text.SimpleDateFormat("yyMMdd").format(cal.getTime()))19  .append("0").toString();20  String type = "YE3MP-";21 String need = new StringBuilder(userId.substring(0, 1)).append(type)22  .append("300").append(licenseNum).append(verTime).toString();23  String dx = new StringBuilder(need).append(LL).append(userId)24  .toString();25  int suf = this.decode(dx);26  String code = new StringBuilder(need).append(String.valueOf(suf))27  .toString();28  return this.change(code);29  }30  private int decode(String s) {31  int i;32  char[] ac;33  int j;34  int k;35  i = 0;36  ac = s.toCharArray();37  j = 0;38  k = ac.length;39  while (j < k) {40  i = (31 * i) + ac[j];41  j++;42  }43  return Math.abs(i);44  }45  private String change(String s) {46  byte[] abyte0;47  char[] ac;48  int i;49  int k;50  int j;51  abyte0 = s.getBytes();52  ac = new char[s.length()];53  i = 0;54  k = abyte0.length;55  while (i < k) {56  j = abyte0[i];57  if ((j >= 48) && (j <= 57)) {58  j = (((j - 48) + 5) % 10) + 48;59  } else if ((j >= 65) && (j <= 90)) {60  j = (((j - 65) + 13) % 26) + 65;61  } else if ((j >= 97) && (j <= 122)) {62  j = (((j - 97) + 13) % 26) + 97;63  }64  ac[i] = (char) j;65  i++;66  }67  return String.valueOf(ac);68  }69  public MyEclipseGen() {70  super();71  }72  public static void main(String[] args) {73  try {74  System.out.println("please input register name:");75 BufferedReader reader = new BufferedReader(new InputStreamReader(76  System.in));77  String userId = null;78  userId = reader.readLine();79  MyEclipseGen myeclipsegen = new MyEclipseGen();80  String res = myeclipsegen.getSerial(userId, "5");81 System.out.println("Serial:" + res);82  reader.readLine();83  } catch (IOException ex) {84  }85  }86  }