Java swing 用户管理系统增删查改功能代码

以下是一个简单的Java Swing用户管理系统的增删查改功能代码示例：

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableModel;

public class UserManagementSystem {

    private JFrame frame;
    private JTextField nameField;
    private JTextField emailField;
    private JTextField ageField;
    private JTable table;
    private DefaultTableModel model;
    private ArrayList<User> userList = new ArrayList<User>();

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    UserManagementSystem window = new UserManagementSystem();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public UserManagementSystem() {
        initialize();
    }

    private void initialize() {
        frame = new JFrame();
        frame.setBounds(100, 100, 450, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        frame.getContentPane().add(panel);
        panel.setLayout(null);

        JLabel nameLabel = new JLabel("Name:");
        nameLabel.setBounds(10, 10, 80, 25);
        panel.add(nameLabel);

        nameField = new JTextField();
        nameField.setBounds(100, 10, 160, 25);
        panel.add(nameField);
        nameField.setColumns(10);

        JLabel emailLabel = new JLabel("Email:");
        emailLabel.setBounds(10, 40, 80, 25);
        panel.add(emailLabel);

        emailField = new JTextField();
        emailField.setBounds(100, 40, 160, 25);
        panel.add(emailField);
        emailField.setColumns(10);

        JLabel ageLabel = new JLabel("Age:");
        ageLabel.setBounds(10, 70, 80, 25);
        panel.add(ageLabel);

        ageField = new JTextField();
        ageField.setBounds(100, 70, 160, 25);
        panel.add(ageField);
        ageField.setColumns(10);

        JButton addButton = new JButton("Add");
        addButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                addUser();
            }
        });
        addButton.setBounds(10, 100, 80, 25);
        panel.add(addButton);

        JButton updateButton = new JButton("Update");
        updateButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                updateSelectedUser();
            }
        });
        updateButton.setBounds(100, 100, 80, 25);
        panel.add(updateButton);

        JButton deleteButton = new JButton("Delete");
        deleteButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                deleteSelectedUser();
            }
        });
        deleteButton.setBounds(190, 100, 80, 25);
        panel.add(deleteButton);

        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setBounds(10, 135, 414, 116);
        panel.add(scrollPane);

        table = new JTable();
        model = new DefaultTableModel(new Object[]{"Name", "Email", "Age"}, 0);
        table.setModel(model);
        scrollPane.setViewportView(table);
    }

    private void addUser() {
        String name = nameField.getText();
        String email = emailField.getText();
        int age = Integer.parseInt(ageField.getText());

        User user = new User(name, email, age);
        userList.add(user);

        model.addRow(new Object[]{name, email, age});

        nameField.setText("");
        emailField.setText("");
        ageField.setText("");
    }

    private void updateSelectedUser() {
        int selectedRowIndex = table.getSelectedRow();

        if (selectedRowIndex >= 0) {
            String name = nameField.getText();
            String email = emailField.getText();
            int age = Integer.parseInt(ageField.getText());

            User user = userList.get(selectedRowIndex);
            user.setName(name);
            user.setEmail(email);
            user.setAge(age);

            model.setValueAt(name, selectedRowIndex, 0);
            model.setValueAt(email, selectedRowIndex, 1);
            model.setValueAt(age, selectedRowIndex, 2);

            nameField.setText("");
            emailField.setText("");
            ageField.setText("");
        } else {
            JOptionPane.showMessageDialog(null, "Please select a user to update.");
        }
    }

    private void deleteSelectedUser() {
        int selectedRowIndex = table.getSelectedRow();

        if (selectedRowIndex >= 0) {
            userList.remove(selectedRowIndex);
            model.removeRow(selectedRowIndex);

            nameField.setText("");
            emailField.setText("");
            ageField.setText("");
        } else {
            JOptionPane.showMessageDialog(null, "Please select a user to delete.");
        }
    }

    private class User {
        private String name;
        private String email;
        private int age;

        public User(String name, String email, int age) {
            this.name = name;
            this.email = email;
            this.age = age;
        }

        public String getName() {
            return name;
        }

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

        public String getEmail() {
            return email;
        }

        public void setEmail(String email) {
            this.email = email;
        }

        public int getAge() {
            return age;
        }

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

这个示例演示了如何使用Java Swing创建一个简单的用户管理系统，包括添加、更新、删除和查看用户。用户数据存储在一个包含用户对象的ArrayList中，每个用户对象包含名称、电子邮件和年龄属性。用户界面包括文本框、按钮和表格，表格用于显示当前用户列表。当用户添加、更新或删除时，表格数据模型会相应地进行更改。