registerframe.java

图书管理系统：用户管理

//用户注册窗口

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import java.sql.*;
public class RegisterFrame extends JFrame implements ActionListener{
	static final long serialVersionUID=80;
	JLabel userLabel,passwordLabel,confirmLabel,messageLabel;
	JTextField userText;
	JPasswordField passwordText,confirmText;
	JButton confirmButton,cancelButton;
	Container c=getContentPane();
	Statement sql;
	Dimension screenSize;
	Toolkit tool;
	Image myimage;
	RegisterFrame(String s,Statement sql){
		super(s);
		setSize(220,210);
		tool=getToolkit();
		URL url = getClass().getResource("/images/USER.GIF");
		if(url!=null){
			myimage=tool.getImage(url);
			setIconImage(myimage);
		}
		this.sql=sql;
		userLabel=new JLabel("用户名");
		passwordLabel=new JLabel("密码");
		confirmLabel=new JLabel("确认密码");
		messageLabel=new JLabel("用户名长度>4<20,密码长度>8<20");
		userText=new JTextField(18);
		passwordText=new JPasswordField(18);
		confirmText=new JPasswordField(18);
		confirmButton=new JButton("确定");
		cancelButton=new JButton("取消");
		confirmButton.addActionListener(this);
		cancelButton.addActionListener(this);
		c.setLayout(null);
		c.setBackground(Color.ORANGE);
		c.add(userLabel);
		userLabel.setBounds(10,10,40,30);
		c.add(userText);
		userText.setBounds(50,14,160,22);
		c.add(passwordLabel);
		passwordLabel.setBounds(20,40,30,30);
		c.add(passwordText);
		passwordText.setBounds(50,44,160,22);
		c.add(confirmLabel);
		confirmLabel.setBounds(0,70,50,30);
		c.add(confirmText);
		confirmText.setBounds(50,74,160,22);
		c.add(confirmButton);
		confirmButton.setBounds(30,110,60,30);
		c.add(cancelButton);
		cancelButton.setBounds(130,110,60,30);
		c.add(messageLabel);
		messageLabel.setBounds(10,150,220,30);
		Dimension frameSize=getSize();
		screenSize=Toolkit.getDefaultToolkit().getScreenSize();
		setLocation((screenSize.width - frameSize.width) / 2,(screenSize.height - frameSize.height) / 2);
		setVisible(true);
		setResizable(false);
		addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				dispose();
			}
		});
	}
	public void actionPerformed(ActionEvent e){
		if(e.getSource()==cancelButton){
			dispose();
		}
		else{
			String user=userText.getText().trim();
			String password=new String(passwordText.getPassword());
			String confirm=new String(confirmText.getPassword());
			if(!password.equals(confirm)){
				JOptionPane.showMessageDialog(this,"请确定一定以及肯定两次输入的密码一样！","警告对话框",JOptionPane.WARNING_MESSAGE);
				return;
			}
			if(user.length()>=4&user.length()<=20&password.length()>=8&password.length()<=20&confirm.length()>=8&confirm.length()<=20){
				try{
					user="'"+user+"'";
					password="'"+password+"'";
					String temp="INSERT INTO User_Info VALUES ("+user+","+password+","+"'Common')";
					int n=sql.executeUpdate(temp);
					if(n==1){
						JOptionPane.showMessageDialog(this,"注册成功","消息",JOptionPane.INFORMATION_MESSAGE);
						dispose();	
					}
					
				}
				catch(SQLException e2){
					JOptionPane.showMessageDialog(this,"用户名已存在");
				}
			}
			else{
				JOptionPane.showMessageDialog(this,"请输入正确长度的用户名与密码","警告对话框",JOptionPane.WARNING_MESSAGE);
			}
		}
	}

}