deleteinf.java

我们学完java后的一个综合作业

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

class deleteinf implements ActionListener,ItemListener{
	JDialog dialog;
	JTextField tF1=new JTextField();
	ButtonGroup bg;
	JRadioButton r1,r2;
	int op=0;
	deleteinf(JFrame f)
	{
		dialog=new JDialog(f,"删除联糸人",true);
		Container dialogPane=dialog.getContentPane();
		dialogPane.setLayout(new GridLayout(3,2));
		r1=new JRadioButton("姓名");
		r2=new JRadioButton("电话");
		dialogPane.add(r1);
		dialogPane.add(r2);
		bg=new ButtonGroup();
		bg.add(r1);
		bg.add(r2);
		r1.addItemListener(this);
		r2.addItemListener(this);
		dialogPane.add(new JLabel("请输入要删除的联糸人的信息:",SwingConstants.CENTER));
		dialogPane.add(tF1);
		JButton b1=new JButton("删除");
		dialogPane.add(b1);
		JButton b2=new JButton("取消");
		dialogPane.add(b2);
		b1.addActionListener(this);
		b2.addActionListener(this);
		//dialog.setBounds(200,150,600,130);
		dialog.getRootPane().setDefaultButton(b1);
		dialog.pack();
		dialog.setVisible(true);
		f.addWindowListener(new WindowAdapter()
		  {public void windowClosing(WindowEvent e){System.exit(0);}});
	}
	public void itemStateChanged(ItemEvent e)
	{
		if(e.getSource()==r1) op=1;
		if(e.getSource()==r2) op=2;
	}
	public void actionPerformed(ActionEvent e)
	{
		String cmd=e.getActionCommand();
		if(cmd.equals("删除"))
		{
			try{
				Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
				Connection con=
					DriverManager.getConnection("jdbc:odbc:notebook","zxp","121");
				Statement s=con.createStatement(); 
				PreparedStatement ps=null;
				String n=tF1.getText();
				switch(op)
				{
				case 1:
				ps=con.prepareStatement("DELETE FROM phone WHERE name=?"); 
				ps.setString(1, n);
				//resultSet=ps.executeQuery();
				if(ps.executeUpdate()!=1)
				{
					JOptionPane.showMessageDialog(dialog,"您要删除的联糸人不存在!");
				}else
				{
					dialog.dispose();
					JOptionPane.showMessageDialog(dialog,"删除成功");
					con.close();
					s.close();
				}break;
				case 2:
					ps=con.prepareStatement("DELETE FROM phone WHERE phone=?"); 
					ps.setString(1, n);
					//resultSet=ps.executeQuery();
					if(ps.executeUpdate()!=1)
					{
						JOptionPane.showMessageDialog(dialog,"您要删除的联糸人不存在!");
					}else
					{
						dialog.dispose();
						JOptionPane.showMessageDialog(dialog,"删除成功");
					con.close();
					s.close();
					}break;
				//con.close();
				//s.close();
				}
			}catch(Exception ex){System.exit(0);}
		}
			else if(cmd.equals("取消"))
			{
				dialog.dispose();
			}
		
		}
}