MyEclipse6.5 注册码生成方法，自己输入用户名

 1 package com.gen;

 2 

 3 import java.io.BufferedReader;

 4 import java.io.IOException;

 5 import java.io.InputStreamReader;

 6 

 7 public class MyEclipseGen {

 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 MyEclipseGen() {

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             MyEclipseGen myeclipsegen = new MyEclipseGen();

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

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

85             reader.readLine();

86         } catch (IOException ex) {

87         }

88     }

89 

90 }