MyEclipse 代码运行生产的key

package cc.dfsoft.cc;

import java.io.BufferedReader;  

import java.io.IOException;  

import java.io.InputStreamReader;  

public class MyEclipseKeyGen {  

    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))  

        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;  

        abyte0 = s.getBytes();  

        ac = new char[s.length()];  

        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 MyEclipseKeyGen() {  

        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();  

            MyEclipseKeyGen myeclipsekeygen = new MyEclipseKeyGen();  

            String res = myeclipsekeygen.getSerial(userId, "5");  

            System.out.println("Serial:" + res);  

            reader.readLine();  

        } catch (IOException ex) {  

}  

本文转自杨海龙的博客博客51CTO博客，原文链接http://blog.51cto.com/7218743/1598683如需转载请自行联系原作者

IT达仁