无他,在网上看了一个 MyEclipse 注册码生成代码,运行该类后,只需在控制台输入用户名,便能生成相应的注册码,很强。(没仔细研究过它的代码,原理)现献上源码:
import java.io.*;
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 i &#61; (31 * i) &#43; ac[j]; j&#43;&#43;; } return Math.abs(i); } private String change(String s) { byte[] abyte0; char[] ac; int i; int k; int j; abyte0 &#61; s.getBytes(); ac &#61; new char[s.length()]; i &#61; 0; k &#61; abyte0.length; while (i j &#61; abyte0[i]; if ((j >&#61; 48) && (j <&#61; 57)) { j &#61; (((j - 48) &#43; 5) % 10) &#43; 48; } else if ((j >&#61; 65) && (j <&#61; 90)) { j &#61; (((j - 65) &#43; 13) % 26) &#43; 65; } else if ((j >&#61; 97) && (j <&#61; 122)) { j &#61; (((j - 97) &#43; 13) % 26) &#43; 97; } ac[i] &#61; (char) j; i&#43;&#43;; } return String.valueOf(ac); } public MyEclipseGen() { super(); } public static void main(String[] args) { try { System.out.println("please input register name:"); BufferedReader reader &#61; new BufferedReader(new InputStreamReader( System.in)); String userId &#61; null; userId &#61; reader.readLine(); MyEclipseGen myeclipsegen &#61; new MyEclipseGen(); String res &#61; myeclipsegen.getSerial(userId, "20"); //无限制版将20改成0 System.out.println("Serial:" &#43; res); reader.readLine(); } catch (IOException ex) { } } }