userdle.java

这个是由于项目需要

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class UserDle extends JFrame implements ActionListener
{
	JPanel panel;
	JLabel nameLabel;
	JTextField name;
	JButton sub;
	JButton cancel;
	Container container;
	public UserDle()
	{
		super("删除联系人");
		panel=new JPanel();
		name=new JTextField(10);
		nameLabel=new JLabel("删除人的姓名：");
		sub=new JButton("确定删除");
		sub.addActionListener(this);
		cancel=new JButton("取消");
		cancel.addActionListener(this);
		Box telBox=Box.createHorizontalBox();
		telBox.add(nameLabel);
		telBox.add(Box.createHorizontalStrut(19));
		telBox.add(name);
		telBox.add(Box.createHorizontalGlue());
			
		Box buttonBox=Box.createHorizontalBox();
		buttonBox.add(Box.createHorizontalStrut(30));
		buttonBox.add(sub);
		buttonBox.add(Box.createHorizontalStrut(30));
		buttonBox.add(cancel);
		buttonBox.add(Box.createHorizontalGlue()); 
		
		Box box=Box.createVerticalBox();
		box.add(telBox);
		box.add(Box.createVerticalStrut(10));
		box.add(buttonBox);
		box.add(Box.createVerticalStrut(10));
        panel.add(box);
        setContentPane(panel);
        setBounds(120,120,300,160);
		setVisible(true);
		
	}
	public void actionPerformed(ActionEvent e)
	{
		if(e.getSource()==sub)
		{
			String nameStr;
			nameStr=name.getText().trim();
			if(nameStr.equals(""))
			{
				JOptionPane.showMessageDialog(null, "姓名不能为空");
			}
			else
			{
				DataConn conn=new DataConn();
				String sql="delete from friends where name='"+nameStr+"'";
				if(conn.SqlDelete(sql))
				{
					JOptionPane.showMessageDialog(null, "删除联系人成功！！");
				}
				else
				{
					JOptionPane.showMessageDialog(null, "删除联系人失败！请检查是否存在此联系人");
				}
			}
		}
		if(e.getSource()==cancel)
		{
			this.dispose();
		}
	}
}