diff --git a/LibrarySystemGUI.java b/LibrarySystemGUI.java
new file mode 100644
index 0000000..0b16bab
--- /dev/null
+++ b/LibrarySystemGUI.java
@@ -0,0 +1,639 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.ArrayList;
+import java.util.List;
+
+// 图书类
+class Book {
+    private String id;
+    private String title;
+    private String author;
+    private String isbn;
+    private String category;
+    private boolean available;
+
+    public Book(String id, String title, String author, String isbn, String category) {
+        this.id = id;
+        this.title = title;
+        this.author = author;
+        this.isbn = isbn;
+        this.category = category;
+        this.available = true;
+    }
+
+    // Getter和Setter方法
+    public String getId() { return id; }
+    public void setId(String id) { this.id = id; }
+    
+    public String getTitle() { return title; }
+    public void setTitle(String title) { this.title = title; }
+    
+    public String getAuthor() { return author; }
+    public void setAuthor(String author) { this.author = author; }
+    
+    public String getIsbn() { return isbn; }
+    public void setIsbn(String isbn) { this.isbn = isbn; }
+    
+    public String getCategory() { return category; }
+    public void setCategory(String category) { this.category = category; }
+    
+    public boolean isAvailable() { return available; }
+    public void setAvailable(boolean available) { this.available = available; }
+    
+    @Override
+    public String toString() {
+        return "ID: " + id + ", 书名: " + title + ", 作者: " + author + 
+               ", ISBN: " + isbn + ", 类别: " + category + 
+               ", 状态: " + (available ? "可借" : "已借出");
+    }
+}
+
+// 用户类
+class User {
+    private String username;
+    private String password;
+    private String email;
+    
+    public User(String username, String password, String email) {
+        this.username = username;
+        this.password = password;
+        this.email = email;
+    }
+    
+    // Getter和Setter方法
+    public String getUsername() { return username; }
+    public void setUsername(String username) { this.username = username; }
+    
+    public String getPassword() { return password; }
+    public void setPassword(String password) { this.password = password; }
+    
+    public String getEmail() { return email; }
+    public void setEmail(String email) { this.email = email; }
+}
+
+// 图书管理系统类
+class LibraryManagementSystem {
+    private List<Book> books;
+    private List<User> users;
+    private User currentUser;
+    
+    public LibraryManagementSystem() {
+        books = new ArrayList<>();
+        users = new ArrayList<>();
+        // 添加一些初始图书
+        books.add(new Book("B001", "Java编程思想", "Bruce Eckel", "9787111213826", "编程"));
+        books.add(new Book("B002", "设计模式", "Erich Gamma", "9787111075647", "编程"));
+        books.add(new Book("B003", "算法导论", "Thomas H. Cormen", "9787111407010", "算法"));
+    }
+    
+    // 用户注册
+    public boolean registerUser(String username, String password, String email) {
+        // 检查用户名是否已存在
+        for (User user : users) {
+            if (user.getUsername().equals(username)) {
+                return false;
+            }
+        }
+        
+        users.add(new User(username, password, email));
+        return true;
+    }
+    
+    // 用户登录
+    public boolean loginUser(String username, String password) {
+        for (User user : users) {
+            if (user.getUsername().equals(username) && user.getPassword().equals(password)) {
+                currentUser = user;
+                return true;
+            }
+        }
+        return false;
+    }
+    
+    // 获取当前用户
+    public User getCurrentUser() {
+        return currentUser;
+    }
+    
+    // 添加图书
+    public boolean addBook(Book book) {
+        // 检查ID是否已存在
+        for (Book b : books) {
+            if (b.getId().equals(book.getId())) {
+                return false;
+            }
+        }
+        books.add(book);
+        return true;
+    }
+    
+    // 删除图书
+    public boolean deleteBook(String bookId) {
+        for (int i = 0; i < books.size(); i++) {
+            if (books.get(i).getId().equals(bookId)) {
+                books.remove(i);
+                return true;
+            }
+        }
+        return false;
+    }
+    
+    // 更新图书
+    public boolean updateBook(String bookId, Book updatedBook) {
+        for (int i = 0; i < books.size(); i++) {
+            if (books.get(i).getId().equals(bookId)) {
+                books.set(i, updatedBook);
+                return true;
+            }
+        }
+        return false;
+    }
+    
+    // 查找图书
+    public List<Book> searchBooks(String keyword) {
+        List<Book> result = new ArrayList<>();
+        for (Book book : books) {
+            if (book.getTitle().contains(keyword) || 
+                book.getAuthor().contains(keyword) || 
+                book.getCategory().contains(keyword) ||
+                book.getId().contains(keyword)) {
+                result.add(book);
+            }
+        }
+        return result;
+    }
+    
+    // 获取所有图书
+    public List<Book> getAllBooks() {
+        return new ArrayList<>(books);
+    }
+    
+    // 根据ID获取图书
+    public Book getBookById(String bookId) {
+        for (Book book : books) {
+            if (book.getId().equals(bookId)) {
+                return book;
+            }
+        }
+        return null;
+    }
+}
+
+// 主界面
+public class LibrarySystemGUI extends JFrame {
+    private LibraryManagementSystem librarySystem;
+    private JPanel mainPanel;
+    private CardLayout cardLayout;
+    
+    // 登录面板组件
+    private JTextField loginUsernameField;
+    private JPasswordField loginPasswordField;
+    
+    // 注册面板组件
+    private JTextField registerUsernameField;
+    private JPasswordField registerPasswordField;
+    private JTextField registerEmailField;
+    
+    // 主功能面板组件
+    private JTextArea bookListArea;
+    private JTextField searchField;
+    private DefaultListModel<String> bookListModel;
+    private JList<String> bookList;
+    
+    public LibrarySystemGUI() {
+        librarySystem = new LibraryManagementSystem();
+        initializeGUI();
+    }
+    
+    private void initializeGUI() {
+        setTitle("图书管理系统");
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setSize(800, 600);
+        setLocationRelativeTo(null);
+        
+        // 创建主面板和卡片布局
+        cardLayout = new CardLayout();
+        mainPanel = new JPanel(cardLayout);
+        
+        // 添加各个面板
+        mainPanel.add(createLoginPanel(), "login");
+        mainPanel.add(createRegisterPanel(), "register");
+        mainPanel.add(createMainPanel(), "main");
+        
+        add(mainPanel);
+        cardLayout.show(mainPanel, "login");
+        
+        setVisible(true);
+    }
+    
+    // 创建登录面板
+    private JPanel createLoginPanel() {
+        JPanel panel = new JPanel(new BorderLayout());
+        panel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
+        
+        // 标题
+        JLabel titleLabel = new JLabel("图书管理系统", JLabel.CENTER);
+        titleLabel.setFont(new Font("微软雅黑", Font.BOLD, 24));
+        panel.add(titleLabel, BorderLayout.NORTH);
+        
+        // 表单面板
+        JPanel formPanel = new JPanel(new GridLayout(3, 2, 10, 10));
+        formPanel.setBorder(BorderFactory.createEmptyBorder(50, 100, 50, 100));
+        
+        JLabel usernameLabel = new JLabel("用户名:");
+        loginUsernameField = new JTextField();
+        JLabel passwordLabel = new JLabel("密码:");
+        loginPasswordField = new JPasswordField();
+        
+        formPanel.add(usernameLabel);
+        formPanel.add(loginUsernameField);
+        formPanel.add(passwordLabel);
+        formPanel.add(loginPasswordField);
+        
+        // 按钮面板
+        JPanel buttonPanel = new JPanel(new FlowLayout());
+        JButton loginButton = new JButton("登录");
+        JButton registerButton = new JButton("注册");
+        
+        loginButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                String username = loginUsernameField.getText();
+                String password = new String(loginPasswordField.getPassword());
+                
+                if (username.isEmpty() || password.isEmpty()) {
+                    JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                        "用户名和密码不能为空!", "错误", JOptionPane.ERROR_MESSAGE);
+                    return;
+                }
+                
+                if (librarySystem.loginUser(username, password)) {
+                    JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                        "登录成功!", "成功", JOptionPane.INFORMATION_MESSAGE);
+                    refreshBookList();
+                    cardLayout.show(mainPanel, "main");
+                } else {
+                    JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                        "用户名或密码错误!", "错误", JOptionPane.ERROR_MESSAGE);
+                }
+            }
+        });
+        
+        registerButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                cardLayout.show(mainPanel, "register");
+            }
+        });
+        
+        buttonPanel.add(loginButton);
+        buttonPanel.add(registerButton);
+        
+        formPanel.add(new JLabel()); // 占位
+        formPanel.add(buttonPanel);
+        
+        panel.add(formPanel, BorderLayout.CENTER);
+        
+        return panel;
+    }
+    
+    // 创建注册面板
+    private JPanel createRegisterPanel() {
+        JPanel panel = new JPanel(new BorderLayout());
+        panel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
+        
+        // 标题
+        JLabel titleLabel = new JLabel("用户注册", JLabel.CENTER);
+        titleLabel.setFont(new Font("微软雅黑", Font.BOLD, 24));
+        panel.add(titleLabel, BorderLayout.NORTH);
+        
+        // 表单面板
+        JPanel formPanel = new JPanel(new GridLayout(4, 2, 10, 10));
+        formPanel.setBorder(BorderFactory.createEmptyBorder(50, 100, 50, 100));
+        
+        JLabel usernameLabel = new JLabel("用户名:");
+        registerUsernameField = new JTextField();
+        JLabel passwordLabel = new JLabel("密码:");
+        registerPasswordField = new JPasswordField();
+        JLabel emailLabel = new JLabel("邮箱:");
+        registerEmailField = new JTextField();
+        
+        formPanel.add(usernameLabel);
+        formPanel.add(registerUsernameField);
+        formPanel.add(passwordLabel);
+        formPanel.add(registerPasswordField);
+        formPanel.add(emailLabel);
+        formPanel.add(registerEmailField);
+        
+        // 按钮面板
+        JPanel buttonPanel = new JPanel(new FlowLayout());
+        JButton registerButton = new JButton("注册");
+        JButton backButton = new JButton("返回登录");
+        
+        registerButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                String username = registerUsernameField.getText();
+                String password = new String(registerPasswordField.getPassword());
+                String email = registerEmailField.getText();
+                
+                if (username.isEmpty() || password.isEmpty() || email.isEmpty()) {
+                    JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                        "所有字段都不能为空!", "错误", JOptionPane.ERROR_MESSAGE);
+                    return;
+                }
+                
+                if (librarySystem.registerUser(username, password, email)) {
+                    JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                        "注册成功! 请登录.", "成功", JOptionPane.INFORMATION_MESSAGE);
+                    cardLayout.show(mainPanel, "login");
+                } else {
+                    JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                        "用户名已存在!", "错误", JOptionPane.ERROR_MESSAGE);
+                }
+            }
+        });
+        
+        backButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                cardLayout.show(mainPanel, "login");
+            }
+        });
+        
+        buttonPanel.add(registerButton);
+        buttonPanel.add(backButton);
+        
+        formPanel.add(new JLabel()); // 占位
+        formPanel.add(buttonPanel);
+        
+        panel.add(formPanel, BorderLayout.CENTER);
+        
+        return panel;
+    }
+    
+    // 创建主功能面板
+    private JPanel createMainPanel() {
+        JPanel panel = new JPanel(new BorderLayout());
+        
+        // 顶部面板 - 欢迎信息和搜索
+        JPanel topPanel = new JPanel(new BorderLayout());
+        topPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
+        
+        JLabel welcomeLabel = new JLabel("欢迎使用图书管理系统");
+        welcomeLabel.setFont(new Font("微软雅黑", Font.BOLD, 18));
+        topPanel.add(welcomeLabel, BorderLayout.WEST);
+        
+        JPanel searchPanel = new JPanel(new FlowLayout());
+        searchField = new JTextField(20);
+        JButton searchButton = new JButton("搜索");
+        JButton logoutButton = new JButton("退出登录");
+        
+        searchButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                String keyword = searchField.getText();
+                if (keyword.isEmpty()) {
+                    refreshBookList();
+                } else {
+                    List<Book> searchResult = librarySystem.searchBooks(keyword);
+                    updateBookList(searchResult);
+                }
+            }
+        });
+        
+        logoutButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                int result = JOptionPane.showConfirmDialog(LibrarySystemGUI.this, 
+                    "确定要退出登录吗?", "确认", JOptionPane.YES_NO_OPTION);
+                if (result == JOptionPane.YES_OPTION) {
+                    cardLayout.show(mainPanel, "login");
+                    // 清空登录信息
+                    loginUsernameField.setText("");
+                    loginPasswordField.setText("");
+                }
+            }
+        });
+        
+        searchPanel.add(new JLabel("搜索:"));
+        searchPanel.add(searchField);
+        searchPanel.add(searchButton);
+        searchPanel.add(logoutButton);
+        
+        topPanel.add(searchPanel, BorderLayout.EAST);
+        panel.add(topPanel, BorderLayout.NORTH);
+        
+        // 中央面板 - 图书列表
+        JPanel centerPanel = new JPanel(new BorderLayout());
+        centerPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
+        
+        bookListModel = new DefaultListModel<>();
+        bookList = new JList<>(bookListModel);
+        JScrollPane scrollPane = new JScrollPane(bookList);
+        
+        centerPanel.add(new JLabel("图书列表:"), BorderLayout.NORTH);
+        centerPanel.add(scrollPane, BorderLayout.CENTER);
+        
+        panel.add(centerPanel, BorderLayout.CENTER);
+        
+        // 底部面板 - 功能按钮
+        JPanel bottomPanel = new JPanel(new FlowLayout());
+        bottomPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
+        
+        JButton addButton = new JButton("添加图书");
+        JButton editButton = new JButton("编辑图书");
+        JButton deleteButton = new JButton("删除图书");
+        JButton refreshButton = new JButton("刷新列表");
+        
+        addButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                showAddBookDialog();
+            }
+        });
+        
+        editButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                int selectedIndex = bookList.getSelectedIndex();
+                if (selectedIndex == -1) {
+                    JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                        "请先选择一本图书!", "提示", JOptionPane.WARNING_MESSAGE);
+                    return;
+                }
+                
+                String selectedBookInfo = bookListModel.getElementAt(selectedIndex);
+                String bookId = selectedBookInfo.split(",")[0].split(":")[1].trim();
+                
+                Book book = librarySystem.getBookById(bookId);
+                if (book != null) {
+                    showEditBookDialog(book);
+                }
+            }
+        });
+        
+        deleteButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                int selectedIndex = bookList.getSelectedIndex();
+                if (selectedIndex == -1) {
+                    JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                        "请先选择一本图书!", "提示", JOptionPane.WARNING_MESSAGE);
+                    return;
+                }
+                
+                String selectedBookInfo = bookListModel.getElementAt(selectedIndex);
+                String bookId = selectedBookInfo.split(",")[0].split(":")[1].trim();
+                
+                int result = JOptionPane.showConfirmDialog(LibrarySystemGUI.this, 
+                    "确定要删除这本图书吗?", "确认删除", JOptionPane.YES_NO_OPTION);
+                
+                if (result == JOptionPane.YES_OPTION) {
+                    if (librarySystem.deleteBook(bookId)) {
+                        JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                            "图书删除成功!", "成功", JOptionPane.INFORMATION_MESSAGE);
+                        refreshBookList();
+                    } else {
+                        JOptionPane.showMessageDialog(LibrarySystemGUI.this, 
+                            "图书删除失败!", "错误", JOptionPane.ERROR_MESSAGE);
+                    }
+                }
+            }
+        });
+        
+        refreshButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                refreshBookList();
+            }
+        });
+        
+        bottomPanel.add(addButton);
+        bottomPanel.add(editButton);
+        bottomPanel.add(deleteButton);
+        bottomPanel.add(refreshButton);
+        
+        panel.add(bottomPanel, BorderLayout.SOUTH);
+        
+        return panel;
+    }
+    
+    // 显示添加图书对话框
+    private void showAddBookDialog() {
+        JTextField idField = new JTextField();
+        JTextField titleField = new JTextField();
+        JTextField authorField = new JTextField();
+        JTextField isbnField = new JTextField();
+        JTextField categoryField = new JTextField();
+        
+        JPanel panel = new JPanel(new GridLayout(5, 2, 10, 10));
+        panel.add(new JLabel("图书ID:"));
+        panel.add(idField);
+        panel.add(new JLabel("书名:"));
+        panel.add(titleField);
+        panel.add(new JLabel("作者:"));
+        panel.add(authorField);
+        panel.add(new JLabel("ISBN:"));
+        panel.add(isbnField);
+        panel.add(new JLabel("类别:"));
+        panel.add(categoryField);
+        
+        int result = JOptionPane.showConfirmDialog(this, panel, "添加图书", 
+            JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
+        
+        if (result == JOptionPane.OK_OPTION) {
+            String id = idField.getText();
+            String title = titleField.getText();
+            String author = authorField.getText();
+            String isbn = isbnField.getText();
+            String category = categoryField.getText();
+            
+            if (id.isEmpty() || title.isEmpty() || author.isEmpty() || 
+                isbn.isEmpty() || category.isEmpty()) {
+                JOptionPane.showMessageDialog(this, "所有字段都不能为空!", "错误", JOptionPane.ERROR_MESSAGE);
+                return;
+            }
+            
+            Book newBook = new Book(id, title, author, isbn, category);
+            if (librarySystem.addBook(newBook)) {
+                JOptionPane.showMessageDialog(this, "图书添加成功!", "成功", JOptionPane.INFORMATION_MESSAGE);
+                refreshBookList();
+            } else {
+                JOptionPane.showMessageDialog(this, "图书ID已存在!", "错误", JOptionPane.ERROR_MESSAGE);
+            }
+        }
+    }
+    
+    // 显示编辑图书对话框
+    private void showEditBookDialog(Book book) {
+        JTextField idField = new JTextField(book.getId());
+        idField.setEditable(false); // ID不可编辑
+        JTextField titleField = new JTextField(book.getTitle());
+        JTextField authorField = new JTextField(book.getAuthor());
+        JTextField isbnField = new JTextField(book.getIsbn());
+        JTextField categoryField = new JTextField(book.getCategory());
+        
+        JPanel panel = new JPanel(new GridLayout(5, 2, 10, 10));
+        panel.add(new JLabel("图书ID:"));
+        panel.add(idField);
+        panel.add(new JLabel("书名:"));
+        panel.add(titleField);
+        panel.add(new JLabel("作者:"));
+        panel.add(authorField);
+        panel.add(new JLabel("ISBN:"));
+        panel.add(isbnField);
+        panel.add(new JLabel("类别:"));
+        panel.add(categoryField);
+        
+        int result = JOptionPane.showConfirmDialog(this, panel, "编辑图书", 
+            JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
+        
+        if (result == JOptionPane.OK_OPTION) {
+            String title = titleField.getText();
+            String author = authorField.getText();
+            String isbn = isbnField.getText();
+            String category = categoryField.getText();
+            
+            if (title.isEmpty() || author.isEmpty() || isbn.isEmpty() || category.isEmpty()) {
+                JOptionPane.showMessageDialog(this, "所有字段都不能为空!", "错误", JOptionPane.ERROR_MESSAGE);
+                return;
+            }
+            
+            Book updatedBook = new Book(book.getId(), title, author, isbn, category);
+            updatedBook.setAvailable(book.isAvailable());
+            
+            if (librarySystem.updateBook(book.getId(), updatedBook)) {
+                JOptionPane.showMessageDialog(this, "图书更新成功!", "成功", JOptionPane.INFORMATION_MESSAGE);
+                refreshBookList();
+            } else {
+                JOptionPane.showMessageDialog(this, "图书更新失败!", "错误", JOptionPane.ERROR_MESSAGE);
+            }
+        }
+    }
+    
+    // 刷新图书列表
+    private void refreshBookList() {
+        List<Book> books = librarySystem.getAllBooks();
+        updateBookList(books);
+    }
+    
+    // 更新图书列表显示
+    private void updateBookList(List<Book> books) {
+        bookListModel.clear();
+        for (Book book : books) {
+            bookListModel.addElement(book.toString());
+        }
+    }
+    
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                new LibrarySystemGUI();
+            }
+        });
+    }
+}
\ No newline at end of file