學習了 Java 的 GUI 后，嘗試著做了一個仿QQ登錄界面，感覺還行。

實現功能：

• 記住密碼
• 自動登錄（需要記住密碼才能使用自動登錄）

說明：
沒有用到數據庫，賬號和密碼是寫死的。賬號為 admin，密碼為 123456。

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運行效果：

源碼如下：

• QQInitializer.java

import javafx.scene.layout.Background; import util.FileUtils;import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.FocusEvent; import java.awt.event.FocusListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionAdapter; import java.io.*; import java.util.Date; import java.util.concurrent.TimeUnit;import javax.swing.*;public class QQInitializer extends JFrame {private int x = 0, y = 0; // 用來存放拖動窗口時鼠標的當前位置private LoginButtonListener loginButtonListener; // 登陸按鈕的監聽對象private JFrame frame; // frame窗口private JButton miniButton; // 最小化按鈕private JButton closeButton; // 關閉按鈕private JButton loginButton; // 登錄按鈕private JPanel northPanel; // 北部面板private JPanel westPanel; // 西部面板private JPanel centerPanel; // 中部面板private JPanel eastPanel; // 東部面板private JPanel southPanel; // 南部面板private JLabel northLabel; // 北部標簽private JLabel westLabel; // 西部標簽private JLabel codeLabel; // 忘記密碼標簽private JLabel enrollLabel; // 注冊賬號標簽private JTextField text; // 賬號文本框private JPasswordField codeWord; // 密碼框private JCheckBox auto; // 自動登錄復選框private JCheckBox mima; // 記住密碼復選框private static boolean mimaState; // 記住密碼復選框的當前狀態private static boolean loginState; // 自動登錄復選框的當前狀態double time; // 讓主界面停留的時間private static String id; // 儲存記住的賬號private static final String ACCOUNT = "admin"; // 賬號private static final String PASSWORD = "123456"; // 密碼// 用到的圖片在 src/images 中private static final String IMAGE_PATH = System.getProperty("user.dir") + "\\src\\images\\";// 保存賬號、記住密碼、自動登錄的文件private static final String TEMP_FILE_PATH = System.getProperty("user.dir") + "\\src\\temp\\";// 登錄窗口的寬高private final int WIDTH = 500;private final int HEIGHT = 330;// 自動登錄時, 登錄界面的停留時間(單位：秒)private final int BLOCK_TIME = 2;public static void run() {new QQInitializer();}// 初始化界面public QQInitializer() {init();}private void init() {frame = new JFrame("QQ登錄");Toolkit t = Toolkit.getDefaultToolkit();Dimension d = t.getScreenSize(); // frame.setBounds((d.width - d.width / 3) / 2, (d.height - d.height / 3) / 2, 500, 330);frame.setSize(WIDTH, HEIGHT);frame.setLocation(d.width / 2 - frame.getWidth() / 2, d.height / 2 - frame.getHeight() / 2);frame.setIconImage(t.getImage(getImagePath("icon.jpg")));frame.setDefaultCloseOperation(HIDE_ON_CLOSE);frame.setUndecorated(true);//取消自帶的邊框frame.setResizable(false);northPanel = creatNorth();westPanel = creatWest();centerPanel = creatCenter();southPanel = creatSouth();eastPanel = creatEast();frame.add(northPanel, BorderLayout.NORTH);frame.add(westPanel, BorderLayout.WEST);frame.add(southPanel, BorderLayout.SOUTH);frame.add(centerPanel, BorderLayout.CENTER);frame.add(eastPanel, BorderLayout.EAST);// 由于將 JFrame 自帶的邊框隱藏了，所以需要通過下面的方法來實現窗口的拖動功能frame.addMouseListener(new MouseAdapter() {public void mousePressed(MouseEvent e) {x = e.getX(); // 鼠標的 Xy = e.getY(); // 鼠標的 Y}});frame.addMouseMotionListener(new MouseMotionAdapter() {public void mouseDragged(MouseEvent e) {int x_screen = e.getXOnScreen();int y_screen = e.getYOnScreen();int xx = x_screen - x;int yy = y_screen - y;frame.setLocation(xx, yy);}});// 此句必須放在最后frame.setVisible(true);if (auto.isSelected()) {loginButton.setEnabled(false);System.out.println(BLOCK_TIME + " 秒后自動登錄...");Date d1 = new Date();try {TimeUnit.SECONDS.sleep(BLOCK_TIME); // 停留一秒} catch (InterruptedException e1) {e1.printStackTrace();}Date d2 = new Date();time = (double) ((d2.getTime() - d1.getTime()) / 1000);}// 是否自動登錄（在這個 BLOCK_TIME 秒內, 如果沒有將自動登錄的復選框去掉, 則自動登錄; 否則不登錄）if (time == BLOCK_TIME && auto.isSelected()) {frame.dispose();onSuccess(true);} else if (time == BLOCK_TIME) {loginButton.setEnabled(true);File file1 = new File(getTempFilePath("autologin.txt"));OutputStream os;try {os = new FileOutputStream(file1);byte[] b = "false".getBytes();os.write(b);os.close();} catch (Exception e1) {e1.printStackTrace();}}}/*** 創建北部面板*/public JPanel creatNorth() {JPanel northPanel = new JPanel();northPanel.setLayout(null);northPanel.setPreferredSize(new Dimension(0, 190));ImageIcon in = new ImageIcon(getImagePath("b.jpg"));JLabel cc = new JLabel(in);cc.setBounds(0, 0, 500, 190);cc.setOpaque(false);closeButton = new JButton(new ImageIcon(getImagePath("close_normal.png"))); // 將圖片作為按鈕的背景closeButton.setRolloverIcon(new ImageIcon(getImagePath("close_hover.png"))); // 鼠標進入按鈕時切換圖片closeButton.setPressedIcon(new ImageIcon(getImagePath("close_hover.png"))); // 鼠標按下按鈕時切換圖片closeButton.setBounds(468, 0, 30, 30);closeButton.setToolTipText("關閉");closeButton.setContentAreaFilled(false); // 設置按鈕透明closeButton.setBorderPainted(false); // 取消按鈕的邊框closeButton.setFocusPainted(false); // 消除按鈕的焦點，即點擊按鈕時不出現邊框closeButton.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); // 將鼠標設置為手掌型miniButton = new JButton(new ImageIcon(getImagePath("mini.jpg")));miniButton.setRolloverIcon(new ImageIcon(getImagePath("mini.png")));miniButton.setPressedIcon(new ImageIcon(getImagePath("mini.png")));miniButton.setBounds(437, 0, 30, 30);miniButton.setToolTipText("最小化");miniButton.setContentAreaFilled(false);miniButton.setBorderPainted(false);miniButton.setFocusPainted(false);miniButton.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); // 將鼠標設置為手掌型northPanel.add(closeButton);northPanel.add(miniButton);northPanel.add(cc);closeButton.addActionListener(new closeButtonListener());miniButton.addActionListener(new miniButtonListener());return northPanel;}/*** 創建西部面板*/public JPanel creatWest() {JPanel jp2 = new JPanel();jp2.setLayout(null);jp2.setPreferredSize(new Dimension(160, 0));ImageIcon ss = new ImageIcon(getImagePath("qq.png"));JLabel cs = new JLabel(ss);cs.setBounds(35, 0, 100, 100);jp2.add(cs);return jp2;}/*** 創建中部面板*/public JPanel creatCenter() {File file = new File(getTempFilePath("rememberme.txt"));if (file.exists()) {InputStream input = null;try {input = new FileInputStream(file);byte[] b = new byte[(int) file.length()];input.read(b);mimaState = Boolean.parseBoolean(new String(b));input.close();} catch (FileNotFoundException e1) {e1.printStackTrace();} catch (IOException e1) {e1.printStackTrace();}} else {mimaState = Boolean.parseBoolean(new String("false"));}File file1 = new File(getTempFilePath("autologin.txt"));if (file1.exists()) {InputStream input = null;try {input = new FileInputStream(file1);byte[] b = new byte[(int) file1.length()];input.read(b);loginState = Boolean.parseBoolean(new String(b));input.close();} catch (FileNotFoundException e1) {e1.printStackTrace();} catch (IOException e1) {e1.printStackTrace();}} else{loginState = Boolean.parseBoolean(new String("false"));}JPanel jp4 = new JPanel();jp4.setLayout(null);jp4.setPreferredSize(new Dimension(0, 220));text = new JTextField(10); // 最多存放10個字text.setBounds(0, 10, 200, 30);text.setFont(new Font("宋體", Font.BOLD, 17)); // 字體和字體大小// 限制 QQ 賬號只能輸入數字text.addKeyListener(new KeyAdapter() {public void keyTyped(KeyEvent e) {int key = e.getKeyChar();int count = 0;//System.out.println(key);if ((key >= KeyEvent.VK_0 && key <= KeyEvent.VK_9))count++;if ((!(key >= KeyEvent.VK_0 && key <= KeyEvent.VK_9)) || (count == 10))e.consume();}});mima = new JCheckBox("記住密碼", mimaState);mima.setBounds(0, 78, 80, 18);auto = new JCheckBox("自動登錄", loginState);auto.setBounds(110, 78, 80, 18);text.addFocusListener(new JTextFieldListener(text, mima, "QQ號"));text.setOpaque(false);jp4.add(text);codeWord = new JPasswordField(18);codeWord.setBounds(0, 42, 200, 30);codeWord.setFont(new Font("宋體", Font.BOLD, 17));codeWord.addFocusListener(new JPasswordFielddListener(codeWord, mima, "密碼"));codeWord.setOpaque(false);jp4.add(mima);jp4.add(codeWord);jp4.add(auto);// 將賬號框和密碼框注冊到登陸按扭的事件處理上loginButtonListener = new LoginButtonListener(text, codeWord, mima, auto);return jp4;}/*** 創建南部面板*/public JPanel creatSouth() {JPanel jp3 = new JPanel();jp3.setLayout(null);jp3.setPreferredSize(new Dimension(0, 40));loginButton = new JButton("登 錄", new ImageIcon(getImagePath("login_normal.png"))); // 登錄loginButton.setRolloverIcon(new ImageIcon(getImagePath("login_hover.png"))); // 鼠標進入按鈕時切換圖片loginButton.setPressedIcon(new ImageIcon(getImagePath("login_hover.png"))); // 鼠標按下按鈕時切換圖片loginButton.setBounds(160, 0, 200, 30);loginButton.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); // 將鼠標設置為手掌型loginButton.setContentAreaFilled(false);loginButton.setFocusPainted(false);loginButton.setBorderPainted(false); // 取消按鈕的邊框loginButton.setFocusPainted(false); // 消除按鈕的焦點，即點擊按鈕時不出現邊框loginButton.setVerticalTextPosition(SwingConstants.CENTER);loginButton.setHorizontalTextPosition(SwingConstants.CENTER);loginButton.setFont(new Font("宋體", Font.BOLD, 15));loginButton.setForeground(new Color(255, 255, 255));jp3.add(loginButton);loginButton.addActionListener(loginButtonListener);return jp3;}/*** 創建東部面板*/public JPanel creatEast() {JPanel jp5 = new JPanel();jp5.setLayout(null);jp5.setPreferredSize(new Dimension(130, 0));enrollLabel = new JLabel("注冊賬號");enrollLabel.setBounds(0, 10, 100, 30);enrollLabel.setFont(new Font("宋體", Font.BOLD, 15));enrollLabel.setForeground(new Color(100, 149, 238));enrollLabel.addMouseListener(new LabelAdapter(enrollLabel, "注冊賬號"));enrollLabel.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); // 將鼠標設置為手型codeLabel = new JLabel("忘記密碼");codeLabel.setBounds(0, 42, 100, 30);codeLabel.setFont(new Font("宋體", Font.BOLD, 15));codeLabel.setForeground(new Color(100, 149, 238));codeLabel.addMouseListener(new LabelAdapter(codeLabel, "忘記密碼"));codeLabel.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));jp5.add(enrollLabel);jp5.add(codeLabel);return jp5;}/*** 北部面板關閉按鈕的事件處理*/class closeButtonListener implements ActionListener {public void actionPerformed(ActionEvent e) {//frame.dispose();System.exit(0);}}/*** 北部面板最小化按鈕的事件處理*/class miniButtonListener implements ActionListener {public void actionPerformed(ActionEvent e) {frame.setExtendedState(frame.ICONIFIED);}}/** 南部的登錄按鈕的事件處理*/class LoginButtonListener implements ActionListener {private JTextField t;private JPasswordField f;private JCheckBox mima;private JCheckBox login;public LoginButtonListener(JTextField t, JPasswordField f, JCheckBox mima, JCheckBox login) {this.t = t;this.f = f;this.mima = mima;this.login = login;}public void actionPerformed(ActionEvent e) {String account = t.getText();String password = new String(f.getPassword());File rememberMimaFile = new File(getTempFilePath("rememberme.txt"));File autoLoginFile = new File(getTempFilePath("autologin.txt"));if (ACCOUNT.equals(account) && PASSWORD.equals(password)) {// 如果登錄時記住了密碼, 則記錄狀態, 下次登錄時自動填充賬號和密碼if (mima.isSelected()) {File file2 = new File(getTempFilePath("account.txt"));try {FileUtils.createFile(getTempFilePath("account.txt"));OutputStream os1 = new FileOutputStream(file2);byte[] b1 = account.getBytes();os1.write(b1);os1.close();} catch (IOException e2) {e2.printStackTrace();}try {FileUtils.createFile(getTempFilePath("rememberme.txt"));OutputStream os = new FileOutputStream(rememberMimaFile);byte[] b = "true".getBytes();os.write(b);os.close();} catch (IOException e1) {e1.printStackTrace();}} else {try {FileUtils.createFile(getTempFilePath("rememberme.txt"));OutputStream os = new FileOutputStream(rememberMimaFile);byte[] b = "false".getBytes();os.write(b);os.close();} catch (IOException e1) {e1.printStackTrace();}}// 自動登錄if (mima.isSelected() && login.isSelected()) {try {FileUtils.createFile(getTempFilePath("autologin.txt"));OutputStream os = new FileOutputStream(autoLoginFile);byte[] b = "true".getBytes();os.write(b);os.close();} catch (IOException e1) {e1.printStackTrace();}} else {try {FileUtils.createFile(getTempFilePath("autologin.txt"));OutputStream os = new FileOutputStream(autoLoginFile);byte[] b = "false".getBytes();os.write(b);os.close();} catch (IOException e1) {e1.printStackTrace();}}// 登錄成功frame.dispose();onSuccess(true);} else {JOptionPane.showMessageDialog(null, "賬號或密碼錯誤，請重新輸入", "提示消息", JOptionPane.ERROR_MESSAGE);}}}/*** 實現文本框的焦點功能，當焦點不在文本框內時，顯示默認提示信息（QQ號）*/public class JTextFieldListener implements FocusListener {private String str;private JTextField text1;private JCheckBox rememberMima;public JTextFieldListener(JTextField text1, JCheckBox rememberMima, String str) {this.text1 = text1;this.rememberMima = rememberMima;this.str = str;if (rememberMima.isSelected()) {File file = new File(getTempFilePath("account.txt"));try {InputStream in = new FileInputStream(file);byte[] bn = new byte[(int) file.length()];in.read(bn);in.close();id = new String(bn);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}text1.setText(new String(id));text1.setForeground(Color.BLACK);} else {text1.setText(str);text1.setForeground(Color.gray);}}public void focusGained(FocusEvent e) {if (text1.getText().equals(str)) {text1.setText("");text1.setForeground(Color.BLACK);}}public void focusLost(FocusEvent e) {if (text1.getText().equals("")) {text1.setForeground(Color.gray);text1.setText(str);}}}/*** 實現密碼框的焦點功能，當焦點不在密碼框內時，顯示默認提示信息（密碼）*/public class JPasswordFielddListener implements FocusListener {private String str;private JPasswordField text1;private JCheckBox rememberMima;public JPasswordFielddListener(JPasswordField text1, JCheckBox rememberMima, String str) {this.text1 = text1;this.rememberMima = rememberMima;this.str = str;if (rememberMima.isSelected()) {String strMima = PASSWORD;text1.setText(strMima);text1.setEchoChar('*');text1.setForeground(Color.BLACK);} else {text1.setText(str);text1.setEchoChar((char) (0));//不設置回顯text1.setForeground(Color.gray);}}public void focusGained(FocusEvent e) {if (text1.getText().equals(str)) {text1.setText("");text1.setEchoChar('*'); // 將回顯設置為'*'text1.setForeground(Color.BLACK);}}public void focusLost(FocusEvent e) {if (text1.getText().equals("")) {text1.setEchoChar((char) (0));text1.setForeground(Color.gray);text1.setText(str);}}}/*** 對注冊賬號和忘記密碼的標簽添加鼠標事件*/public class LabelAdapter extends MouseAdapter {private JFrame jf;private JLabel la;private String title;public LabelAdapter(JLabel la, String title) {this.la = la;this.title = title;}public void mouseClicked(MouseEvent e) {jf = new JFrame(title);Toolkit t = Toolkit.getDefaultToolkit();Dimension d = t.getScreenSize();jf.setBounds((d.width - d.width / 3) / 2, (d.height - d.height / 3) / 2, 500, 330);jf.setBounds(500, 300, 500, 200);jf.setVisible(true);jf.setResizable(false);}public void mouseEntered(MouseEvent e) {la.setForeground(new Color(255, 77, 35));}public void mousePressed(MouseEvent e) {la.setForeground(new Color(255, 77, 35));}public void mouseExited(MouseEvent e) {la.setForeground(new Color(100, 149, 238));}}/*** 登錄成功后的回調*/private void onSuccess(boolean message) {if (message) {if (auto.isSelected() && time == BLOCK_TIME) {JOptionPane.showMessageDialog(null, "自動登錄成功", "提示消息", JOptionPane.INFORMATION_MESSAGE);} else {JOptionPane.showMessageDialog(null, "登錄成功", "提示消息", JOptionPane.INFORMATION_MESSAGE);}}JFrame jf = new JFrame("QQ主頁");Toolkit t = Toolkit.getDefaultToolkit();Dimension d = t.getScreenSize();jf.setIconImage(t.getImage(getImagePath("icon.jpg"))); // jf.setSize(WIDTH, HEIGHT);jf.setDefaultCloseOperation(EXIT_ON_CLOSE); // 關閉時, 退出程序// 設置背景圖片ImageIcon background = new ImageIcon(getImagePath("qqSuccess.png"));JLabel label = new JLabel(background);// 把標簽的大小位置設置為圖片剛好填充整個面板label.setBounds(0, 0, background.getIconWidth(), background.getIconHeight());// 把內容窗格轉化為JPanel，否則不能用方法setOpaque()來使內容窗格透明JPanel imagePanel = (JPanel) jf.getContentPane();imagePanel.setOpaque(false);// 內容窗格默認的布局管理器為BorderLayoutimagePanel.setLayout(new FlowLayout());jf.getLayeredPane().setLayout(null);// 把背景圖片添加到分層窗格的最底層作為背景jf.getLayeredPane().add(label, new Integer(Integer.MIN_VALUE));jf.setSize(background.getIconWidth(), background.getIconHeight()); // jf.setLocation(d.width / 2 - jf.getWidth() / 2, d.height / 2 - jf.getHeight() / 2);jf.setLocation(d.width - d.width / 4 , d.height / 7);jf.setVisible(true);}private String getImagePath(String imageName) {if (imageName == null || imageName.trim().length() == 0) {throw new RuntimeException("圖片名稱不能為空");}return IMAGE_PATH + imageName;}private String getTempFilePath(String fileName) {if (fileName == null || fileName.trim().length() == 0) {throw new RuntimeException("圖片名稱不能為空");}return TEMP_FILE_PATH + fileName;} }

• Application.java

public class Application {public static void main(String[] args) {QQInitializer.run();} }

• FileUtils.java

import java.io.File; import java.io.IOException;public class FileUtils {public static void makeSureParentExist(String fileName) {if (fileName == null || fileName.trim().length() == 0) {return;}File file = new File(fileName);if (!file.exists() && !file.isDirectory()) {file = new File(file.getParent());file.mkdirs();}}public static boolean createFile(String fileName) throws IOException{makeSureParentExist(fileName);File file = new File(fileName);if (file.exists()) {return true;}return file.createNewFile();} }

以上代碼可以直接運行（直接運行 Application.java 即可）。

項目的目錄結構如下：

src ├─images │ b.jpg │ close_hover.png │ close_normal.png │ icon.jpg │ keyboard.png │ login_hover.png │ login_normal.png │ mini.jpg │ mini.png │ qq.png │ qqSuccess.png │ right_hover.png │ right_normal.png │ single_down.png │ single_normal.png │ ├─main │ Application.java │ QQInitializer.java │ └─utilFileUtils.java

代碼中使用到的圖片

鏈接：網盤鏈接
提取碼：zm8j

鏈接：網盤鏈接
提取碼：ywf6

如果直接點擊鏈接，可能會跳轉到 CSDN 的資源界面，需要開通 VIP 才能下載，有點 ex。右鍵 -> 在新窗口打開鏈接 就可以跳轉到網盤了。

將圖片放在 src / images 文件夾下，圖片的名字不要修改。

總結

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