Java版学生管理系统

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Student {
    // 创建JFrame窗口
    private JFrame frame = new JFrame("课堂随机点名系统");

    // 创建菜单条
    JMenuBar menuBar = new JMenuBar();

    // 创建菜单组件
    JMenu fileMenu = new JMenu("文件");
    JMenu classroomMenu = new JMenu("班级管理");
    JMenu studentMenu = new JMenu("学生管理");
    JMenu groupMenu = new JMenu("小组管理");
    JMenu classMenu = new JMenu("课堂管理");

    // 菜单项组件
    JMenuItem addGroup = new JMenuItem("新增小组");
    JMenuItem groupOrganize = new JMenuItem("小组列表");
    JMenuItem addStudent = new JMenuItem("新增学生");
    JMenuItem studentOrganize = new JMenuItem("学生列表");
    JMenuItem randomGroup = new JMenuItem("随机小组");
    JMenuItem randomStudent = new JMenuItem("随机学生");
    JMenuItem addClass = new JMenuItem("新增班级");
    JMenuItem classOrganize = new JMenuItem("班级列表");
    JMenuItem selectClass = new JMenuItem("选择班级");

    // 当前选择的班级
    private String currentClass = null;

    public void init() {
        // 添加菜单项到对应的菜单
        groupMenu.add(addGroup);
        groupMenu.add(groupOrganize);
        studentMenu.add(addStudent);
        studentMenu.add(studentOrganize);
        classMenu.add(randomGroup);
        classMenu.add(randomStudent);
        classroomMenu.add(addClass);
        classroomMenu.add(classOrganize);
        classroomMenu.add(selectClass);

        // 添加菜单到菜单条
        menuBar.add(fileMenu); // 文件菜单暂时未添加任何项目
        menuBar.add(classroomMenu);
        menuBar.add(studentMenu);
        menuBar.add(groupMenu);
        menuBar.add(classMenu);

        // 为每个菜单项添加监听器
        addGroup.addActionListener(e -> checkIfClassIsSelected(() -> showAddGroupDialog()));
        groupOrganize.addActionListener(e -> checkIfClassIsSelected(() -> showGroupOrganizeDialog()));
        addStudent.addActionListener(e -> checkIfClassIsSelected(() -> showAddStudentDialog()));
        studentOrganize.addActionListener(e -> checkIfClassIsSelected(() -> showStudentOrganizeDialog()));
        randomGroup.addActionListener(e -> checkIfClassIsSelected(() -> showRandomGroupDialog()));
        randomStudent.addActionListener(e -> checkIfClassIsSelected(() -> showRandomStudentDialog()));
        addClass.addActionListener(e -> showAddClassDialog());
        classOrganize.addActionListener(e -> showClassOrganizeDialog());
        selectClass.addActionListener(e -> showSelectClassDialog());

        // 把菜单条放入到JFrame中
        frame.setJMenuBar(menuBar);

        // 设置窗口关闭操作
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 设置窗口最佳大小
        frame.pack();

        // 设置窗口可见性
        frame.setVisible(true);
    }

    private void checkIfClassIsSelected(Runnable action) {
        if (currentClass == null) {
            JOptionPane.showMessageDialog(frame, "请选择班级！", "警告", JOptionPane.WARNING_MESSAGE);
        } else {
            action.run();
        }
    }

    private void showAddGroupDialog() {
        JFrame dialog = new JFrame("新增小组");
        dialog.setSize(300, 200);
        dialog.setLayout(new FlowLayout());
        dialog.add(new JLabel("小组名称:"));
        JTextField groupNameField = new JTextField(20);
        dialog.add(groupNameField);
        JButton okButton = new JButton("确定");
        okButton.addActionListener(e -> {
            String groupName = groupNameField.getText();
            if (groupName.trim().isEmpty()) {
                JOptionPane.showMessageDialog(dialog, "请输入有效的小组名称！", "错误", JOptionPane.ERROR_MESSAGE);
            } else {
                JOptionPane.showMessageDialog(dialog, "新增小组: " + groupName + " 成功！", "成功", JOptionPane.INFORMATION_MESSAGE);
                dialog.dispose();
            }
        });
        dialog.add(okButton);
        dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }

    private void showGroupOrganizeDialog() {
        JFrame dialog = new JFrame("小组列表");
        dialog.setSize(300, 200);
        dialog.setLayout(new BorderLayout());
        JList<String> list = new JList<>(new String[]{"小组1", "小组2", "小组3"});
        dialog.add(new JScrollPane(list), BorderLayout.CENTER);
        dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }

    private void showAddStudentDialog() {
        JFrame dialog = new JFrame("新增学生");
        dialog.setSize(300, 200);
        dialog.setLayout(new FlowLayout());
        dialog.add(new JLabel("学生姓名:"));
        JTextField studentNameField = new JTextField(20);
        dialog.add(studentNameField);
        JButton okButton = new JButton("确定");
        okButton.addActionListener(e -> {
            String studentName = studentNameField.getText();
            if (studentName.trim().isEmpty()) {
                JOptionPane.showMessageDialog(dialog, "请输入有效的学生姓名！", "错误", JOptionPane.ERROR_MESSAGE);
            } else {
                JOptionPane.showMessageDialog(dialog, "新增学生: " + studentName + " 成功！", "成功", JOptionPane.INFORMATION_MESSAGE);
                dialog.dispose();
            }
        });
        dialog.add(okButton);
        dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }

    private void showStudentOrganizeDialog() {
        JFrame dialog = new JFrame("学生列表");
        dialog.setSize(300, 200);
        dialog.setLayout(new BorderLayout());
        JList<String> list = new JList<>(new String[]{"张三", "李四", "王五"});
        dialog.add(new JScrollPane(list), BorderLayout.CENTER);
        dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }

    private void showRandomGroupDialog() {
        List<String> groups = new ArrayList<>();
        groups.add("小组1");
        groups.add("小组2");
        groups.add("小组3");

        JFrame dialog = new JFrame("随机小组");
        dialog.setSize(300, 200);
        dialog.setLayout(new FlowLayout());
        JButton randomButton = new JButton("随机选择");
        randomButton.addActionListener(e -> {
            if (!groups.isEmpty()) {
                Collections.shuffle(groups);
                String selectedGroup = groups.get(0);
                JOptionPane.showMessageDialog(dialog, "随机选中的小组是: " + selectedGroup, "随机小组", JOptionPane.INFORMATION_MESSAGE);
            } else {
                JOptionPane.showMessageDialog(dialog, "小组列表为空", "错误", JOptionPane.ERROR_MESSAGE);
            }
        });
        dialog.add(randomButton);
        dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }

    private void showRandomStudentDialog() {
        List<String> students = new ArrayList<>();
        students.add("张三");
        students.add("李四");
        students.add("王五");
        students.add("赵六");

        JFrame dialog = new JFrame("随机学生");
        dialog.setSize(300, 200);
        dialog.setLayout(new FlowLayout());
        JButton randomButton = new JButton("随机选择");
        randomButton.addActionListener(e -> {
            if (!students.isEmpty()) {
                Collections.shuffle(students);
                String selectedStudent = students.get(0);
                JOptionPane.showMessageDialog(dialog, "随机选中的学生是: " + selectedStudent, "随机学生", JOptionPane.INFORMATION_MESSAGE);
            } else {
                JOptionPane.showMessageDialog(dialog, "学生列表为空", "错误", JOptionPane.ERROR_MESSAGE);
            }
        });
        dialog.add(randomButton);
        dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }

    private void showAddClassDialog() {
        JFrame dialog = new JFrame("新增班级");
        dialog.setSize(300, 200);
        dialog.setLayout(new FlowLayout());
        dialog.add(new JLabel("班级名称:"));
        JTextField classNameField = new JTextField(20);
        dialog.add(classNameField);
        JButton okButton = new JButton("确定");
        okButton.addActionListener(e -> {
            String className = classNameField.getText();
            if (className.trim().isEmpty()) {
                JOptionPane.showMessageDialog(dialog, "请输入有效的班级名称！", "错误", JOptionPane.ERROR_MESSAGE);
            } else {
                JOptionPane.showMessageDialog(dialog, "新增班级: " + className + " 成功！", "成功", JOptionPane.INFORMATION_MESSAGE);
                dialog.dispose(); // 关闭对话框
            }
        });
        dialog.add(okButton);
        dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }

    private void showClassOrganizeDialog() {
        JFrame dialog = new JFrame("班级列表");
        dialog.setSize(300, 200);
        dialog.setLayout(new BorderLayout());
        JList<String> list = new JList<>(new String[]{"班级1", "班级2", "班级3"});
        dialog.add(new JScrollPane(list), BorderLayout.CENTER);
        dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }

    private void showSelectClassDialog() {
        JFrame dialog = new JFrame("选择班级");
        dialog.setSize(300, 200);
        dialog.setLayout(new BorderLayout());
        JList<String> classList = new JList<>(new String[]{"班级1", "班级2", "班级3"});
        JButton okButton = new JButton("确定");
        okButton.addActionListener(e -> {
            String selectedClass = (String) classList.getSelectedValue();
            if (selectedClass == null) {
                JOptionPane.showMessageDialog(dialog, "请选择一个班级！", "错误", JOptionPane.ERROR_MESSAGE);
            } else {
                currentClass = selectedClass;
                JOptionPane.showMessageDialog(dialog, "已选择班级: " + selectedClass, "成功", JOptionPane.INFORMATION_MESSAGE);
                dialog.dispose();
            }
        });
        JPanel buttonPanel = new JPanel();
        buttonPanel.add(okButton);
        dialog.add(new JScrollPane(classList), BorderLayout.CENTER);
        dialog.add(buttonPanel, BorderLayout.SOUTH);
        dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new Student().init());
    }
}