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  }