student_studying/src/controller/AppController.java

package controller;

import ui.LoginPanel;
import ui.RegisterPanel;


import javax.swing.*;
import java.awt.*;

/**
 * 控制器：负责界面切换与核心逻辑
 */
public class AppController {
    private JFrame frame;
    private UserManager userManager;

    public AppController() {
        userManager = new UserManager();

        frame = new JFrame("学生数学学习系统");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(450, 400);
        frame.setLocationRelativeTo(null);
        frame.setLayout(new BorderLayout());

        showLoginPanel();
        frame.setVisible(true);
    }

    /** 显示登录界面 */
    public void showLoginPanel() {
        frame.getContentPane().removeAll();
        frame.add(new LoginPanel(this));
        frame.revalidate();
        frame.repaint();
    }

    /** 显示注册界面 */
    public void showRegisterPanel() {
        frame.getContentPane().removeAll();
        frame.add(new RegisterPanel(this));
        frame.revalidate();
        frame.repaint();
    }

    /** 登录逻辑 */
    public void handleLogin(String email, String password) {
        if (userManager.checkLogin(email, password)) {
            JOptionPane.showMessageDialog(frame, "登录成功！");
            // TODO: 跳转到题目选择界面（QuizPanel）
        } else {
            JOptionPane.showMessageDialog(frame, "邮箱或密码错误！");
        }
    }

    /** 注册逻辑 */
    public void handleRegister(String email, String password) {
        if (userManager.isUserExist(email)) {
            JOptionPane.showMessageDialog(frame, "该邮箱已注册！");
            return;
        }
        userManager.addUser(email, password);
        JOptionPane.showMessageDialog(frame, "注册成功！请登录。");
        showLoginPanel();
    }
}