java实现的MyEclipse注册机
直接上代码
import java.io.*;import java.text.*;import java.util.Calendar;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){Calendar cal = Calendar.getInstance();cal.add(1, 3);cal.add(6, -1);NumberFormat nf = new DecimalFormat("000");licenseNum = nf.format(Integer.valueOf(licenseNum));String verTime = (new StringBuilder("-")).append((new 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("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.").append(userId).toString();int suf = decode(dx);String code = (new StringBuilder(need)).append(String.valueOf(suf)).toString();return change(code);}private int decode(String s){int i = 0;char ac[] = s.toCharArray();int j = 0;for (int k = ac.length; j < k; j++)i = 31 * i + ac[j];return Math.abs(i);}private String change(String s){byte abyte0[] = s.getBytes();char ac[] = new char[s.length()];int i = 0;for (int k = abyte0.length; i < k; i++){int j = abyte0[i];if (j >= 48 && j <= 57)j = ((j - 48) + 5) % 10 + 48;elseif (j >= 65 && j <= 90)j = ((j - 65) + 13) % 26 + 65;elseif (j >= 97 && j <= 122)j = ((j - 97) + 13) % 26 + 97;ac[i] = (char)j;}return String.valueOf(ac);}public MyEclipseGen(){}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, "20");System.out.println((new StringBuilder()).append("Serial:").append(res).toString());reader.readLine();}catch (IOException ex) { }}}