JAVA课程设计代码1.笔记共享平台： 要求：使用图形化界面，用户通过注册账号（用户名和密码）后，登录笔记共享平台。 1.可以编写自己的笔记 2.可以保存自己的笔记，并记录最后一次保存的时间 3.设置笔记的状态（共享or私有） 4.若笔记共享则发布到笔记广场，供其他用户参阅，运用Java生成完整代码，并给出代码思路

生成代码思路： 1. 创建Java项目，添加GUI库，如JavaFX或Swing。 2. 创建用户类，包含用户名和密码属性，以及笔记列表属性。 3. 创建笔记类，包含笔记内容、状态（共享/私有）、作者和最后保存时间等属性。 4. 创建笔记广场类，包含一个笔记列表，用于存储共享的笔记。 5. 创建登录窗口，用户可以输入用户名和密码进行登录或注册。 6. 创建笔记编辑窗口，用户可以编写自己的笔记、设置笔记状态、保存笔记等操作。 7. 创建笔记广场窗口，用户可以查看其他用户共享的笔记。 完整代码如下： User.java ``` import java.util.ArrayList; import java.util.List; public class User { private String username; private String password; private List<Note> notes; public User(String username, String password) { this.username = username; this.password = password; this.notes = new ArrayList<>(); } public String getUsername() { return username; } public String getPassword() { return password; } public List<Note> getNotes() { return notes; } public void addNote(Note note) { notes.add(note); } public void removeNote(Note note) { notes.remove(note); } } ``` Note.java ``` import java.time.LocalDateTime; public class Note { private String content; private boolean isShared; private User author; private LocalDateTime lastSavedTime; public Note(String content, boolean isShared, User author) { this.content = content; this.isShared = isShared; this.author = author; this.lastSavedTime = LocalDateTime.now(); } public String getContent() { return content; } public void setContent(String content) { this.content = content; this.lastSavedTime = LocalDateTime.now(); } public boolean isShared() { return isShared; } public void setShared(boolean shared) { isShared = shared; } public User getAuthor() { return author; } public LocalDateTime getLastSavedTime() { return lastSavedTime; } } ``` NoteSquare.java ``` import java.util.ArrayList; import java.util.List; public class NoteSquare { private List<Note> notes; public NoteSquare() { this.notes = new ArrayList<>(); } public List<Note> getNotes() { return notes; } public void addNote(Note note) { notes.add(note); } public void removeNote(Note note) { notes.remove(note); } } ``` LoginWindow.java ``` import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class LoginWindow extends JFrame { private JTextField usernameField; private JPasswordField passwordField; private JButton loginButton; private JButton registerButton; public LoginWindow() { initComponents(); setupLayout(); setupListeners(); } private void initComponents() { usernameField = new JTextField(20); passwordField = new JPasswordField(20); loginButton = new JButton("登录"); registerButton = new JButton("注册"); } private void setupLayout() { JPanel panel = new JPanel(new GridLayout(3, 2, 5, 5)); panel.add(new JLabel("用户名：")); panel.add(usernameField); panel.add(new JLabel("密码：")); panel.add(passwordField); panel.add(loginButton); panel.add(registerButton); setContentPane(panel); setTitle("登录"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); pack(); setResizable(false); setLocationRelativeTo(null); } private void setupListeners() { loginButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { String username = usernameField.getText(); String password = String.valueOf(passwordField.getPassword()); // TODO: 根据用户名和密码进行登录验证 } }); registerButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { String username = usernameField.getText(); String password = String.valueOf(passwordField.getPassword()); // TODO: 注册新用户 } }); } } ``` NoteEditorWindow.java ``` import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class NoteEditorWindow extends JFrame { private JTextArea contentArea; private JCheckBox shareCheckBox; private JButton saveButton; private Note note; public NoteEditorWindow(User user, Note note) { this.note = note; initComponents(); setupLayout(); setupListeners(); } private void initComponents() { contentArea = new JTextArea(note.getContent(), 20, 40); shareCheckBox = new JCheckBox("共享", note.isShared()); saveButton = new JButton("保存"); } private void setupLayout() { JPanel panel = new JPanel(new BorderLayout(5, 5)); JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT)); buttonPanel.add(shareCheckBox); buttonPanel.add(saveButton); panel.add(new JScrollPane(contentArea), BorderLayout.CENTER); panel.add(buttonPanel, BorderLayout.SOUTH); setContentPane(panel); setTitle("编辑笔记"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); pack(); setResizable(false); setLocationRelativeTo(null); } private void setupListeners() { saveButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { String content = contentArea.getText(); boolean isShared = shareCheckBox.isSelected(); note.setContent(content); note.setShared(isShared); // TODO: 更新最后保存时间 } }); } } ``` NoteSquareWindow.java ``` import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class NoteSquareWindow extends JFrame { private JList<Note> noteList; private JButton viewButton; public NoteSquareWindow(User user, NoteSquare noteSquare) { initComponents(); setupLayout(); setupListeners(); } private void initComponents() { DefaultListModel<Note> noteListModel = new DefaultListModel<>(); for (Note note : noteSquare.getNotes()) { if (note.isShared()) { noteListModel.addElement(note); } } noteList = new JList<>(noteListModel); viewButton = new JButton("查看"); } private void setupLayout() { JPanel panel = new JPanel(new BorderLayout(5, 5)); JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT)); buttonPanel.add(viewButton); panel.add(new JScrollPane(noteList), BorderLayout.CENTER); panel.add(buttonPanel, BorderLayout.SOUTH); setContentPane(panel); setTitle("笔记广场"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); pack(); setResizable(false); setLocationRelativeTo(null); } private void setupListeners() { viewButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { Note note = noteList.getSelectedValue(); if (note != null) { NoteEditorWindow editorWindow = new NoteEditorWindow(note.getAuthor(), note); editorWindow.setVisible(true); } } }); } } ``` 运行程序的入口类Main.java ``` public class Main { private static User currentUser; private static NoteSquare noteSquare; public static void main(String[] args) { // 初始化数据 init(); // 显示登录窗口 LoginWindow loginWindow = new LoginWindow(); loginWindow.setVisible(true); } private static void init() { // 初始化笔记广场和用户数据 noteSquare = new NoteSquare(); User user1 = new User("user1", "password1"); Note note1 = new Note("Hello, World!", true, user1); user1.addNote(note1); noteSquare.addNote(note1); User user2 = new User("user2", "password2"); Note note2 = new Note("This is my note.", false, user2); user2.addNote(note2); currentUser = null; } public static User getCurrentUser() { return currentUser; } public static void setCurrentUser(User user) { currentUser = user; } public static NoteSquare getNoteSquare() { return noteSquare; } } ``` 以上代码实现了一个简单的笔记共享平台，包括用户登录、笔记编辑、笔记广场等功能。用户可以注册账号并登录，编写自己的笔记并保存，设置笔记的状态为共享或私有，共享的笔记会发布到笔记广场供其他用户参阅。