帮我写一个用java写的有UI的学生管理系统

好的，下面是一个简单的Java学生信息管理系统，具有UI界面，可以实现学生信息的增删改查功能。

代码如下：

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

public class StudentManagementSystem extends JFrame {
    private JTextField idField, nameField, ageField;
    private JButton addButton, deleteButton, updateButton, searchButton;
    private JTextArea resultArea;
    private ArrayList<Student> students;

    public StudentManagementSystem() {
        super("学生管理系统");
        setSize(500, 400);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 初始化UI界面
        initUI();

        // 加载学生信息
        loadStudents();
    }

    private void initUI() {
        // 创建输入框和按钮
        idField = new JTextField(10);
        nameField = new JTextField(10);
        ageField = new JTextField(10);

        addButton = new JButton("添加");
        deleteButton = new JButton("删除");
        updateButton = new JButton("更新");
        searchButton = new JButton("查询");

        // 添加按钮的事件监听器
        addButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                addStudent();
            }
        });

        deleteButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                deleteStudent();
            }
        });

        updateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                updateStudent();
            }
        });

        searchButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                searchStudent();
            }
        });

        // 创建结果显示区域
        resultArea = new JTextArea();
        resultArea.setEditable(false);

        // 创建UI布局并添加组件
        JPanel panel = new JPanel(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();

        c.gridx = 0;
        c.gridy = 0;
        panel.add(new JLabel("学号:"), c);

        c.gridx = 1;
        panel.add(idField, c);

        c.gridx = 0;
        c.gridy = 1;
        panel.add(new JLabel("姓名:"), c);

        c.gridx = 1;
        panel.add(nameField, c);

        c.gridx = 0;
        c.gridy = 2;
        panel.add(new JLabel("年龄:"), c);

        c.gridx = 1;
        panel.add(ageField, c);

        c.gridx = 2;
        c.gridy = 0;
        panel.add(addButton, c);

        c.gridy = 1;
        panel.add(deleteButton, c);

        c.gridy = 2;
        panel.add(updateButton, c);

        c.gridx = 3;
        c.gridy = 0;
        panel.add(searchButton, c);

        // 将组件添加到窗口中
        getContentPane().add(panel, BorderLayout.NORTH);
        getContentPane().add(new JScrollPane(resultArea), BorderLayout.CENTER);
    }

    private void loadStudents() {
        students = new ArrayList<>();

        try {
            BufferedReader reader = new BufferedReader(new FileReader("students.txt"));
            String line;

            while ((line = reader.readLine()) != null) {
                String[] fields = line.split(",");
                int id = Integer.parseInt(fields[0]);
                String name = fields[1];
                int age = Integer.parseInt(fields[2]);

                students.add(new Student(id, name, age));
            }

            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
            JOptionPane.showMessageDialog(this, "读取文件失败！", "错误", JOptionPane.ERROR_MESSAGE);
        }

        updateResultArea();
    }

    private void saveStudents() {
        try {
            PrintWriter writer = new PrintWriter(new FileWriter("students.txt"));

            for (Student student : students) {
                writer.println(student.getId() + "," + student.getName() + "," + student.getAge());
            }

            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
            JOptionPane.showMessageDialog(this, "保存文件失败！", "错误", JOptionPane.ERROR_MESSAGE);
        }
    }

    private void addStudent() {
        int id = Integer.parseInt(idField.getText());
        String name = nameField.getText();
        int age = Integer.parseInt(ageField.getText());

        Student student = new Student(id, name, age);

        students.add(student);

        saveStudents();

        updateResultArea();
    }

    private void deleteStudent() {
        int id = Integer.parseInt(idField.getText());

        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getId() == id) {
                students.remove(i);
                break;
            }
        }

        saveStudents();

        updateResultArea();
    }

    private void updateStudent() {
        int id = Integer.parseInt(idField.getText());
        String name = nameField.getText();
        int age = Integer.parseInt(ageField.getText());

        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getId() == id) {
                students.set(i, new Student(id, name, age));
                break;
            }
        }

        saveStudents();

        updateResultArea();
    }

    private void searchStudent() {
        int id = Integer.parseInt(idField.getText());

        for (Student student : students) {
            if (student.getId() == id) {
                resultArea.setText(student.toString());
                return;
            }
        }

        JOptionPane.showMessageDialog(this, "未找到该学生！", "提示", JOptionPane.INFORMATION_MESSAGE);
    }

    private void updateResultArea() {
        resultArea.setText("");

        for (Student student : students) {
            resultArea.append(student.toString() + "\n");
        }
    }

    public static void main(String[] args) {
        StudentManagementSystem system = new StudentManagementSystem();
        system.setVisible(true);
    }
}

class Student {
    private int id;
    private String name;
    private int age;

    public Student(int id, String name, int age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "学号：" + id + "，姓名：" + name + "，年龄：" + age;
    }
}

该程序使用了Java Swing库实现了UI界面，可以添加、删除、更新和查询学生信息，学生信息以文本文件的形式保存在本地。

需要注意的是，该程序只是一个简单的示例，实际应用中可能需要更多的功能和更复杂的UI界面。