myeclipse 注册码生成

import java.io.*;
 
public class MyEclipseCode {
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.";
 
/**
  * MyEclipse Standard Subscription---------YE2MY-
  */
public static String TYPE_STANDARD_SUBSCRIPTION = "YE2MY-";
  
/**
  * MyEclipse Professional Subscription-----YE3MP-
  */
public static String TYPE_PROFESSIONAL_SUBSCRIPTION = "YE3MP-";
 
/**
  * MyEclipse Blue Subscription-------------YE3MB-
  */
public static String TYPE_BLUE_SUBSCRIPTION = "YE3MB-";
 
/**
  * MyEclipse for Spring Subscription-------YE3MS-
  */
public static String TYPE_FOR_SPRING_SUBSCRIPTION = "YE3MS-";
 
/**
  * 
  * @param userId  注册的用户名
  * @param licenseNum 用户数 999为最大
  * @param type   MyEclipse 类别   MyEclipse Standard Subscription---------YE2MY 
  *            MyEclipse Professional Subscription-----YE3MP
  *            MyEclipse Blue Subscription-------------YE3MB
  *            MyEclipse for Spring Subscription-------YE3MS
  * @return  注册码
  */
public String getSerial( String userId, String licenseNum, String type ) {
  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 StringBuffer( "-" ).append(
    new java.text.SimpleDateFormat( "yyMMdd" ).format( cal.getTime() ) ).append( "0" ).toString();
  String need = new StringBuffer( userId.substring( 0, 1 ) ).append( type ).append( "300" ).append( licenseNum )
    .append( verTime ).toString();
  String dx = new StringBuffer( need ).append( LL ).append( userId ).toString();
  int suf = this.decode( dx );
  String code = new StringBuffer( 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 MyEclipseCode() {
  super();
}
 
public static void main( String[] args ) throws IOException {
  System.out.println( "please input register name:" );
  BufferedReader reader = new BufferedReader( new InputStreamReader( System.in ) );
  String res = new MyEclipseCode().getSerial( reader.readLine(), "999", MyEclipseCode.TYPE_PROFESSIONAL_SUBSCRIPTION );
  System.out.println( "Serial:" + res );
}
}