bookloginiframe.java

图书管理系统java+swing+SQL Server实现 包含了图书管理系统的所有功能 纯JAVA实现

package com.lishan.iframe;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.border.EmptyBorder;
import javax.swing.text.Document;

import com.lishan.Library;
import com.lishan.dao.Dao;
import com.lishan.model.Operater;
import com.lishan.util.CreatedIcon;
import com.lishan.util.MyDocument;

public class BookLoginIFrame extends JFrame {
	private JPasswordField password; // 登陆密码
	private JTextField username; // 登陆用户
	private JButton login; // 登陆按钮
	private JButton reset; // 重新输入按钮
	private static Operater user; // 用户

	private class BookResetAction implements ActionListener {// 对重置事件监听
		public void actionPerformed(final ActionEvent e) {
			username.setText("");
			password.setText("");
		}
	}

	class BookLoginAction implements ActionListener {// 对登陆事件监听
		public void actionPerformed(final ActionEvent e) {
			//核对用户是不是管理员(只要管理员表中有该条记录,则代表此用户是管理员)
			user = Dao.check(username.getText(), password.getText());
			if (user.getName() != null) {//如果是
				try {
					//则显示主窗体,隐藏登陆窗体.
					Library frame = new Library();
					frame.setVisible(true);
					BookLoginIFrame.this.setVisible(false);
				} catch (Exception ex) {
					ex.printStackTrace();
				}
			} else {
				JOptionPane.showMessageDialog(null, "只有管理员才可以登录");
				username.setText("");
				password.setText("");
			}
		}
	}

	/**
	 * 启动登陆界面
	 */
	public BookLoginIFrame() {// 构造登陆界面
		super();
		final BorderLayout borderLayout = new BorderLayout();
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		borderLayout.setVgap(10); // 设置组件间的垂直间距
		setTitle("图书管理系统登陆");
		setBounds(100, 100, 285, 194);

		final JPanel panel = new JPanel();
		panel.setLayout(new BorderLayout());
		panel.setBorder(new EmptyBorder(0, 0, 0, 0)); // 设置边框
		getContentPane().add(panel);

		final JPanel panel_2 = new JPanel();
		final GridLayout gridLayout = new GridLayout(0, 2);
		gridLayout.setHgap(5);
		gridLayout.setVgap(5);
		panel_2.setLayout(gridLayout);
		panel.add(panel_2);

		final JLabel label = new JLabel();
		label.setHorizontalAlignment(SwingConstants.CENTER);// 设置标签内容沿 X 轴的对齐方式
		label.setPreferredSize(new Dimension(0, 0));
		label.setMinimumSize(new Dimension(0, 0));
		panel_2.add(label);
		label.setText("用 户 名");

		username = new JTextField(20);
		username.setPreferredSize(new Dimension(0, 0));
		panel_2.add(username);

		final JLabel label_1 = new JLabel();
		label_1.setHorizontalAlignment(SwingConstants.CENTER);
		panel_2.add(label_1);
		label_1.setText("密   码");

		password = new JPasswordField(20);
		// 将编辑器与一个MyDocument文本文档关联。当前注册的工厂用来生成文档的一个视图，此视图经过重新验证之后由编辑器来显示。
		// 将 PropertyChange 事件 ("document") 传播到每个侦听器。
		password.setDocument(new MyDocument(6));
		password.setEchoChar('*');
		password.addKeyListener(new KeyAdapter() {
			public void keyPressed(final KeyEvent e) {
				if (e.getKeyCode() == 10)
					login.doClick();
			}
		});
		panel_2.add(password);

		final JPanel panel_1 = new JPanel();
		panel.add(panel_1, BorderLayout.SOUTH);

		login = new JButton("登陆");
		login.addActionListener(new BookLoginAction());
		panel_1.add(login);
		reset = new JButton("重置");
		reset.addActionListener(new BookResetAction());
		panel_1.add(reset);

		final JLabel tupianLabel = new JLabel();
		ImageIcon loginIcon = CreatedIcon.add("login.jpg");
		tupianLabel.setIcon(loginIcon);
		tupianLabel.setOpaque(true); // 使组件绘制其边界内的所有像素
		tupianLabel.setBackground(Color.GREEN);
		tupianLabel.setPreferredSize(new Dimension(260, 60));
		panel.add(tupianLabel, BorderLayout.NORTH);

		setVisible(true);
		setResizable(false);
		// this.pack();
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}

	public static Operater getUser() {
		return user;
	}

	public static void setUser(Operater user) {
		BookLoginIFrame.user = user;
	}
	// public static void main(String[] args){
	// new BookLoginIFrame();
	// }
}