用java设计一个人事管理系统，能够实现员工信息（员工编号、姓名、性别、年龄、部门、联系方式）的增 加、删除、修改、查询以及更新功能，将员工信息及其变动情况存储到out.txt中。要求使用类的定义、GUI界面设计、文件IO、集合

好的，我会尽力回答你的问题。

首先，我们可以设计一个Employee类，用于存储员工信息。每个Employee对象将包含员工编号、姓名、性别、年龄、部门、联系方式等属性。代码如下：

public class Employee {
    private int id;
    private String name;
    private String gender;
    private int age;
    private String department;
    private String contact;

    public Employee(int id, String name, String gender, int age, String department, String contact) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.department = department;
        this.contact = contact;
    }

    // getter and setter methods
}

接下来，我们可以设计一个GUI界面，用于显示员工信息，并提供增加、删除、修改、查询和更新员工信息的功能。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 HRSystemGUI extends JFrame implements ActionListener {
    private ArrayList<Employee> employeeList = new ArrayList<>();
    private JTextField idField, nameField, genderField, ageField, departmentField, contactField;
    private JTextArea messageArea;

    public HRSystemGUI() {
        super("人事管理系统");

        // 创建窗口组件
        JButton addButton = new JButton("增加");
        JButton deleteButton = new JButton("删除");
        JButton modifyButton = new JButton("修改");
        JButton queryButton = new JButton("查询");
        JButton updateButton = new JButton("更新");
        JLabel idLabel = new JLabel("编号：");
        JLabel nameLabel = new JLabel("姓名：");
        JLabel genderLabel = new JLabel("性别：");
        JLabel ageLabel = new JLabel("年龄：");
        JLabel departmentLabel = new JLabel("部门：");
        JLabel contactLabel = new JLabel("联系方式：");
        idField = new JTextField(10);
        nameField = new JTextField(10);
        genderField = new JTextField(10);
        ageField = new JTextField(10);
        departmentField = new JTextField(10);
        contactField = new JTextField(10);
        messageArea = new JTextArea(10, 20);
        JScrollPane scrollPane = new JScrollPane(messageArea);

        // 设置布局
        JPanel panel1 = new JPanel();
        panel1.setLayout(new GridLayout(6, 2));
        panel1.add(idLabel);
        panel1.add(idField);
        panel1.add(nameLabel);
        panel1.add(nameField);
        panel1.add(genderLabel);
        panel1.add(genderField);
        panel1.add(ageLabel);
        panel1.add(ageField);
        panel1.add(departmentLabel);
        panel1.add(departmentField);
        panel1.add(contactLabel);
        panel1.add(contactField);

        JPanel panel2 = new JPanel();
        panel2.setLayout(new GridLayout(1, 5));
        panel2.add(addButton);
        panel2.add(deleteButton);
        panel2.add(modifyButton);
        panel2.add(queryButton);
        panel2.add(updateButton);

        Container container = getContentPane();
        container.setLayout(new BorderLayout());
        container.add(panel1, BorderLayout.NORTH);
        container.add(scrollPane, BorderLayout.CENTER);
        container.add(panel2, BorderLayout.SOUTH);

        // 添加事件监听器
        addButton.addActionListener(this);
        deleteButton.addActionListener(this);
        modifyButton.addActionListener(this);
        queryButton.addActionListener(this);
        updateButton.addActionListener(this);

        // 加载员工信息
        loadEmployees();
    }

    // 加载员工信息
    private void loadEmployees() {
        try {
            BufferedReader reader = new BufferedReader(new FileReader("out.txt"));
            String line;
            while ((line = reader.readLine()) != null) {
                String[] fields = line.split(",");
                Employee employee = new Employee(Integer.parseInt(fields[0]), fields[1], fields[2], Integer.parseInt(fields[3]), fields[4], fields[5]);
                employeeList.add(employee);
            }
            reader.close();
            showMessage("员工信息已加载！");
        } catch (IOException e) {
            showMessage("无法加载员工信息：" + e.getMessage());
        }
    }

    // 显示消息
    private void showMessage(String message) {
        messageArea.append(message + "\n");
    }

    // 处理事件
    @Override
    public void actionPerformed(ActionEvent e) {
        String command = e.getActionCommand();
        switch (command) {
            case "增加":
                addEmployee();
                break;
            case "删除":
                deleteEmployee();
                break;
            case "修改":
                modifyEmployee();
                break;
            case "查询":
                queryEmployee();
                break;
            case "更新":
                updateEmployees();
                break;
        }
    }

    // 增加员工信息
    private void addEmployee() {
        int id = Integer.parseInt(idField.getText());
        String name = nameField.getText();
        String gender = genderField.getText();
        int age = Integer.parseInt(ageField.getText());
        String department = departmentField.getText();
        String contact = contactField.getText();
        Employee employee = new Employee(id, name, gender, age, department, contact);
        employeeList.add(employee);
        showMessage("员工信息已添加！");
    }

    // 删除员工信息
    private void deleteEmployee() {
        int id = Integer.parseInt(idField.getText());
        for (Employee employee : employeeList) {
            if (employee.getId() == id) {
                employeeList.remove(employee);
                showMessage("员工信息已删除！");
                return;
            }
        }
        showMessage("找不到该员工信息！");
    }

    // 修改员工信息
    private void modifyEmployee() {
        int id = Integer.parseInt(idField.getText());
        for (Employee employee : employeeList) {
            if (employee.getId() == id) {
                employee.setName(nameField.getText());
                employee.setGender(genderField.getText());
                employee.setAge(Integer.parseInt(ageField.getText()));
                employee.setDepartment(departmentField.getText());
                employee.setContact(contactField.getText());
                showMessage("员工信息已修改！");
                return;
            }
        }
        showMessage("找不到该员工信息！");
    }

    // 查询员工信息
    private void queryEmployee() {
        int id = Integer.parseInt(idField.getText());
        for (Employee employee : employeeList) {
            if (employee.getId() == id) {
                showMessage("编号：" + employee.getId() + "\n姓名：" + employee.getName() + "\n性别：" + employee.getGender() + "\n年龄：" + employee.getAge() + "\n部门：" + employee.getDepartment() + "\n联系方式：" + employee.getContact());
                return;
            }
        }
        showMessage("找不到该员工信息！");
    }

    // 更新员工信息
    private void updateEmployees() {
        try {
            BufferedWriter writer = new BufferedWriter(new FileWriter("out.txt"));
            for (Employee employee : employeeList) {
                writer.write(employee.getId() + "," + employee.getName() + "," + employee.getGender() + "," + employee.getAge() + "," + employee.getDepartment() + "," + employee.getContact() + "\n");
            }
            writer.close();
            showMessage("员工信息已更新！");
        } catch (IOException e) {
            showMessage("无法更新员工信息：" + e.getMessage());
        }
    }

    public static void main(String[] args) {
        HRSystemGUI hrSystemGUI = new HRSystemGUI();
        hrSystemGUI.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        hrSystemGUI.setSize(400, 300);
        hrSystemGUI.setVisible(true);
    }
}

我们可以使用JFrame作为主窗口，将各种组件添加到窗口上。为了方便显示员工信息，我们使用了JTextArea组件，并将其添加到JScrollPane组件中，以支持滚动条。同时，我们还为各个按钮添加了事件监听器，用于处理增加、删除、修改、查询和更新员工信息的操作。

为了实现文件IO，我们使用了BufferedReader和BufferedWriter类，用于读取和写入文件。我们将员工信息存储到out.txt文件中，每个员工占一行，各属性之间用逗号分隔。

为了方便存储和管理员工信息，我们使用了ArrayList类，用于存储所有Employee对象。

最后，我们可以在main方法中创建一个HRSystemGUI对象，并设置窗口的大小和可见性。这样，我们就可以运行这个人事管理系统了。

注意：本示例程序并未对输入进行完整性检查和异常处理，实际使用时需要加以改进。