java 注册机 类库 自动 生成 注册码

新建类 MyEclipseKeyGen 执行以下代码即可 在控制台输入 用户名 即可得到注册码 

不用到处去找注册码了

import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 
 public class MyEclipseKeyGen {
  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 type) {
   NumberFormat nf = new DecimalFormat("000");
   Calendar cal = Calendar.getInstance();
   cal.add(Calendar.YEAR, 3);
   cal.add(Calendar.DAY_OF_YEAR, -1);
   String licenseNum = nf.format((int) (Math.random() * 1000));
   String expTime = new StringBuilder("-").append(
     new SimpleDateFormat("yyMMdd").format(cal.getTime())).append(
     "0").toString();
   String need = new StringBuilder(userId.substring(0, 1)).append("Y")
     .append(type).append("-100").append(licenseNum).append(expTime)
     .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 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();
    if (userId == null || "".equals(userId)) {
     System.out.println("name is null");
     System.exit(0);
    }
    MyEclipseKeyGen myeclipsegen = new MyEclipseKeyGen();
    String res = myeclipsegen.getSerial(userId, "E3MS");
    System.out.println("Serial:" + res);
    reader.readLine();
   } catch (IOException ex) {
    ex.printStackTrace();
   }
  }
 }