【转载】MyEclipse6.5 KeyGen

输入自己的注册名，生成注册码，完成注册
 1 package keyGenerate;
 2 
 3 import java.io.BufferedReader;   
 4 import java.io.IOException;   
 5 import java.io.InputStreamReader;   
 6  
 7 public class KeyGeneratetest {   
 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  java.util.Calendar cal = java.util.Calendar.getInstance();   
12  cal.add(1, 3);   
13  cal.add(6, -1);   
14  java.text.NumberFormat nf = new java.text.DecimalFormat("000");   
15   licenseNum = nf.format(Integer.valueOf(licenseNum));   
16  String verTime = new StringBuilder("-").append(   
17     new java.text.SimpleDateFormat("yyMMdd").format(cal.getTime()))   
18    .append("0").toString();   
19   String type = "YE3MP-";   
20  String need = new StringBuilder(userId.substring(0, 1)).append(type)   
21     .append("300").append(licenseNum).append(verTime).toString();   
22   String dx = new StringBuilder(need).append(LL).append(userId)   
23     .toString();   
24   int suf = this.decode(dx);   
25   String code = new StringBuilder(need).append(String.valueOf(suf))   
26     .toString();   
27  return this.change(code);   
28 }   
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  
46 private String change(String s) {   
47   byte[] abyte0;   
48   char[] ac;   
49   int i;   
50   int k;   
51   int j;   
52   abyte0 = s.getBytes();   
53   ac = new char[s.length()];   
54   i = 0;   
55   k = abyte0.length;   
56   while (i < k) {   
57    j = abyte0[i];   
58    if ((j >= 48) && (j <= 57)) {   
59    j = (((j - 48) + 5) % 10) + 48;   
60     } else if ((j >= 65) && (j <= 90)) {   
61     j = (((j - 65) + 13) % 26) + 65;   
62     } else if ((j >= 97) && (j <= 122)) {   
63     j = (((j - 97) + 13) % 26) + 97;   
64     }   
65     ac[i] = (char) j;   
66     i++;   
67   }   
68  return String.valueOf(ac);   
69 }
70  
71 public KeyGeneratetest() {   
72  super();   
73 }   
74  
75 public static void main(String[] args) {   
76  try {   
77     System.out.println("please input register name:");   
78     BufferedReader reader = new BufferedReader(new InputStreamReader(   
79       System.in));   
80     String userId = null;   
81     userId = reader.readLine();   
82     KeyGeneratetest myeclipsegen = new KeyGeneratetest();   
83     String res = myeclipsegen.getSerial(userId, "5");   
84     System.out.println("Serial:" + res);   
85     reader.readLine();   
86   } catch (IOException ex) {   
87   }   
88 }   
89 }