java生成MyEclipse7.0 注册码

package com.code.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class MyEclipseGen {
	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.";

	public String getSerial(String userId, String licenseNum) {
	   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 StringBuilder("-").append(
	     new java.text.SimpleDateFormat("yyMMdd").format(cal.getTime()))
	     .append("0").toString();
	   String type = "YE3MP-";
	   String need = new StringBuilder(userId.substring(0, 1)).append(type)
	     .append("300").append(licenseNum).append(verTime).toString();
	   String dx = new StringBuilder(need).append(LL).append(userId)
	     .toString();
	   int suf = this.decode(dx);
	   String code = new StringBuilder(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 MyEclipseGen() {
	   super();
	}

	public static void main(String[] args) {
	   try {
	    System.out.println("please input register name:");
	    BufferedReader reader = new BufferedReader(new InputStreamReader(
	      System.in));
	    String userId = null;
	    userId = reader.readLine();
	    MyEclipseGen myeclipsegen = new MyEclipseGen();
	    String res = myeclipsegen.getSerial(userId, "5");
	    System.out.println("Serial:" + res);
	    reader.readLine();
	   } catch (IOException ex) {
	   }
	}
	}