app1.java

提供了一种注册机算法的实现. 里面共有两份分别是题库的代码和注册机的代码

package dcwork;

import javax.swing.UIManager;
import java.awt.*;
import java.util.*;
import java.sql.*;
/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: DISCOVERY</p>
 * @author not attributable
 * @version 1.0
 */

public class App1 {
  boolean packFrame = false;
String a;
  //Construct the application
  public App1() {
    Frame5 frame = new Frame5();


    //Validate frames that have preset sizes
    //Pack frames that have useful preferred size info, e.g. from their layout
    if (packFrame) {
      frame.pack();
    }
    else {
      frame.validate();
    }
    //Center the window
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
   //////////////////
   ///////////////////////////////////////////读取是否注册
    try{
Dcyh yzz= new Dcyh();
Statement stemtjzz = yzz.stmt;
Connection fddz=yzz.con;
ResultSet rsjzz=stemtjzz.executeQuery("SELECT * FROM zcyz WHERE bh='11'");
while(rsjzz.next()){
String zz2=rsjzz.getString(2);
if (zz2.equals("aaa")==true){
// JOptionPane.showMessageDialog(this,"改软件您还未注册!请您注册!");
 frame.setVisible(true);
 ////////////////////类之间传递参数
Frame4 f4=new Frame4(a);
f4.jButton2.setEnabled(false);
////////////////////类之间传递参数

}
else{
frame.setVisible(false);
 ////////////////////类之间传递参数
 Frame4 f4=new Frame4(a);
 f4.jButton2.setEnabled(true);
 ////////////////////类之间传递参数
 Frame1 f1=new Frame1();
 f1.setVisible(true);
}
}fddz.close();
}



catch (SQLException e5a123z) {System.err.println(e5a123z);}

 ///////////////////////////////////////////读取是否注册



  ///////////////////////
  }

  //Main method
  public static void main(String[] args) {
    try {

      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    new App1();
  }
}