daima.txt

试卷组题与实现,基于试题库的试卷组题与实现

package pg1;

import java.awt.*;
import javax.swing.*;



import pg1.Jd;
import java.awt.event.*;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.sql.*;

public class Jd extends JFrame implements ActionListener 
{
	JButton a,b;
	JLabel lb1,lb2,lb3,lb4;
	JComboBox k,x,y,z;
	String kName;
	Connection con=null;
	Statement stmt=null;
	String url="jdbc:odbc:Question";
	/**
	 * 
	 */
	private static final long serialVersionUID = 6551465348039211771L;

	Jd() 
	{    // 界面布置
		super("试卷组题");
		setSize(300,300);
		setVisible(true);
		Container ctp=getContentPane();
		a=new JButton("组题");
		b=new JButton("退出");
		lb1=new JLabel("科目选择");
		lb2=new JLabel("选择题");
		lb3=new JLabel("填空题");
		lb4=new JLabel("判断题");
		k=new JComboBox();
		k.addItem("语文");
		k.addItem("数学");
		k.addItem("英语");
		x=new JComboBox();
		for(int i=0;i<=50;i++){
			x.addItem(i);
		}
		y=new JComboBox();
		for(int i=0;i<=50;i++){
			y.addItem(i);
		}
		z=new JComboBox();
		for(int i=0;i<=50;i++){
			z.addItem(i);
		}
		
		ctp.setLayout(new GridLayout(5,2));
		ctp.add(lb1);ctp.add(k);
		ctp.add(lb2);ctp.add(x);
		ctp.add(lb3);ctp.add(y);
		ctp.add(lb4);ctp.add(z);
		ctp.add(a);ctp.add(b);
		
		// 数据库连接
		
		
		
		try{
			Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");}
		catch(ClassNotFoundException e)
		{System.out.println(e.getMessage());}
		try{
			con=DriverManager.getConnection(url);
			stmt=con.createStatement();}
		catch(SQLException ee){System.out.println(ee.getMessage());}	
		k.addItemListener(new ItemListener(){
			
			public void itemStateChanged(ItemEvent e){
		    	  kName = k.getSelectedItem().toString();
		      }
		    });

		// 按钮分别监听
		a.addActionListener(this);
		b.addActionListener(this);
		addWindowListener(new WindowAdapter()
		{public void windowClosing(WindowEvent e)
		{System.exit(0);}
		});
	}
public void actionPerformed(ActionEvent e)
{
	JButton btn=(JButton) e.getSource();
	if(btn==b)
		System.exit(0);
	else if(btn==a)
	{try{zuti();}
	catch(SQLException ee)
	{System.out.println(ee.getMessage());}
	}
	
}
	
public void zuti() throws SQLException {		ResultSet rs = stmt.executeQuery(
		"SELECT TOP 2 QUE "+
		"FROM Question "+
		"WHERE (OBJ = 2) AND (TYPE = 1) "+
		"ORDER BY NEWID()");
while(rs.next()){
	String questionName=rs.getString(1);
	write("c:\123.txt",questionName);
}
}
public void write(String path, String content){
 String s = new String();
  String s1 = new String();
  try {
   File f = new File(path);
   if (f.exists()) {
    System.out.println("文件存在");
   } else {
    System.out.println("文件不存在，正在创建...");
    if (f.createNewFile()) {
     System.out.println("文件创建成功！");
    } else {
     System.out.println("文件创建失败！");
    }

   }
   BufferedReader input = new BufferedReader(new FileReader(f));

   while ((s = input.readLine()) != null) {
    s1 += s + "\n";
   }
   System.out.println("文件内容：" + s1);
   input.close();
   s1 += content;

   BufferedWriter output = new BufferedWriter(new FileWriter(f));
   output.write(s1);
   output.close();
  } catch (Exception e) {
   e.printStackTrace();
  }

}

public static void main(String[] args)
	{
		new Jd();
		
	}
}