logindialog.java

该代码是一个关于医药进销存管理系统的源代码

package com.lzw;

import java.awt.*;
import java.awt.Font;
import java.awt.event.*;
import java.io.*;
import java.util.*;

import javax.swing.*;
import javax.swing.border.BevelBorder;

import com.lzw.dao.AdapterDao;
import com.lzw.model.Obj_UserName;
import com.lzw.view.JF_main;

public class LoginDialog extends JFrame {
	private static final long serialVersionUID = 1L;

	private LoginPanel loginPanel = null;

	private JLabel jLabel = null;

	private JTextField userField = null;

	private JLabel jLabel1 = null;

	private JPasswordField passwordField = null;

	private JButton loginButton = null;

	private JButton exitButton = null;

	private JF_main mainFrame;

	/**
	 * @param owner
	 */
	public LoginDialog() {
		try {
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
			mainFrame = new JF_main();
			initialize();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 初始化loginPanel登录面板的方法
	 * 
	 * @return com.lzw.login.LoginPanel
	 */
	private LoginPanel getLoginPanel() {
		if (loginPanel == null) {
			jLabel1 = new JLabel();
			jLabel1.setFont(new Font("", Font.BOLD, 12));
			jLabel1.setBounds(new Rectangle(101, 147, 55, 18));
			jLabel1.setText("密　码：");
			jLabel = new JLabel();
			jLabel.setFont(new Font("", Font.BOLD, 12));
			jLabel.setText("用户名：");
			jLabel.setBounds(new Rectangle(100, 117, 56, 18));
			loginPanel = new LoginPanel();
			loginPanel.setLayout(null);
			loginPanel.setBackground(new Color(0xD8DDC7));
			loginPanel.add(jLabel);
			loginPanel.add(getUserField());
			loginPanel.add(jLabel1);
			loginPanel.add(getPasswordField());
			loginPanel.add(getLoginButton());
			loginPanel.add(getExitButton());
		}
		return loginPanel;
	}

	/**
	 * This method initializes userField
	 * 
	 * @return javax.swing.JTextField
	 */
	private JTextField getUserField() {
		if (userField == null) {
			userField = new JTextField();
			userField.setBorder(new BevelBorder(BevelBorder.LOWERED));
			userField.setBounds(new Rectangle(157, 115, 127, 22));
		}
		return userField;
	}

	/**
	 * This method initializes passwordField
	 * 
	 * @return javax.swing.JPasswordField
	 */
	private JPasswordField getPasswordField() {
		if (passwordField == null) {
			passwordField = new JPasswordField();
			passwordField.setBorder(new BevelBorder(BevelBorder.LOWERED));
			passwordField.setBounds(new Rectangle(158, 145, 125, 22));
			passwordField.addKeyListener(new java.awt.event.KeyAdapter() {
				public void keyTyped(java.awt.event.KeyEvent e) {
					if (e.getKeyChar() == '\n')
						loginButton.doClick();
				}
			});
		}
		return passwordField;
	}

	/**
	 * This method initializes loginButton
	 * 
	 * @return javax.swing.JButton
	 */
	private JButton getLoginButton() {
		if (loginButton == null) {
			loginButton = new JButton();
			loginButton.setContentAreaFilled(false);
			loginButton.setBounds(new Rectangle(155, 175, 58, 25));
			loginButton.setIcon(new ImageIcon(getClass().getResource(
					"/images/loginButton.png")));
			loginButton.addActionListener(new ActionListener() {
				private Obj_UserName user;
				public void actionPerformed(ActionEvent e) {
					String id = getUserField().getText().trim();
					if (id == null || id.length() <= 0) {
						JOptionPane.showMessageDialog(null,
								"输入用户ID不能为空,请重新输入!!!", "系统提示",
								JOptionPane.ERROR_MESSAGE);
						getUserField().requestFocus();
						return;
					}
					String sqlStr = "from Obj_UserName where id = '" + id + "'";
					java.util.List list = null;
					list = AdapterDao.QueryObject(sqlStr);
					if (list.size() > 0) {
						Iterator iterator = list.iterator();
						user = (Obj_UserName) iterator.next();
						String pass = new String(getPasswordField()
								.getPassword());
						if (!user.getPassword().equals(pass)) {
							JOptionPane.showMessageDialog(LoginDialog.this,
									"用户名或密码错误，无法登录", "登录失败",
									JOptionPane.ERROR_MESSAGE);
							return;
						}
					}
					Dimension screenSize = Toolkit.getDefaultToolkit()
							.getScreenSize();
					Dimension frameSize = mainFrame.getSize();
					if (frameSize.height > screenSize.height) {
						frameSize.height = screenSize.height;
					}
					if (frameSize.width > screenSize.width) {
						frameSize.width = screenSize.width;
					}
					mainFrame.setLocation(
							(screenSize.width - frameSize.width) / 2,
							(screenSize.height - frameSize.height) / 2);
					mainFrame.setVisible(true);
					LoginDialog.this.setVisible(false);
				}
			});
		}
		return loginButton;
	}

	/**
	 * This method initializes exitButton
	 * 
	 * @return javax.swing.JButton
	 */
	private JButton getExitButton() {
		if (exitButton == null) {
			exitButton = new JButton();
			exitButton.setContentAreaFilled(false);
			exitButton.setBounds(new Rectangle(230, 175, 58, 25));
			exitButton.setIcon(new ImageIcon(getClass().getResource(
					"/images/exitButton.png")));
			exitButton.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					System.exit(0);
				}
			});
		}
		return exitButton;
	}

	/**
	 * 界面初始化方法
	 * 
	 * @return void
	 */
	private void initialize() {
		Dimension size = getToolkit().getScreenSize();
		setLocation((size.width - 296) / 2, (size.height - 188) / 2);
		setSize(389, 256);
		this.setTitle("系统登录");
		setContentPane(getLoginPanel());
	}

	public static void main(String[] args) {
		try {
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
			final SplashScreen splash = SplashScreen.getSplashScreen();
			if (splash == null || !splash.isVisible()) {
				JOptionPane.showMessageDialog(null,
						"程序缺少必要的资源文件，导致闪屏界面失败，程序将终止执行。", "资源不全",
						JOptionPane.WARNING_MESSAGE);
				return;
			}
			new Thread() {
				private FileInputStream fis;
				private Scanner scanner;
				final Graphics2D g2 = splash.createGraphics();
				final Dimension size = splash.getSize();
				private LoginDialog jf_login;
				public void run() {
					try {
						g2.setFont(new Font("宋体", Font.PLAIN, 12));
						drawInfo("程序启动中……");
						initAndRecLog();						// 初始化并记录日志
						fis = new FileInputStream("APPJXC.log");
						scanner = new Scanner(fis);
						while (scanner.hasNextLine()) {
							String str = scanner.nextLine();
							int startInt = str.indexOf('-') + 1;
							if (startInt == -1)
								startInt = 0;
							str = "启动信息：" + str.substring(startInt);
							drawInfo(str);
							Thread.sleep(100);
						}
						scanner.close();
						fis.close();
						jf_login.setVisible(true);
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
				// 初始化系统，并记录日志
				private void initAndRecLog() throws FileNotFoundException {
					FileOutputStream fop = new FileOutputStream("APPJXC.log", false);
					PrintStream ps = new PrintStream(fop);
					System.setOut(ps);
					AdapterDao dao = new AdapterDao();
					if (!dao.getdao())
						return;
					jf_login = new LoginDialog();
				}
				// 在闪屏界面绘制文本信息
				private void drawInfo(String info) {
					g2.setColor(Color.BLACK);
					g2.fillRect(0, size.height - 20, size.width, 20);
					g2.setColor(Color.WHITE);
					g2.drawString(info, 10, size.height - 5);
					splash.update();
				}
			}.start();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
} // @jve:decl-index=0:visual-constraint="10,10"