如何将JComboBox与数据库值进行比较

import java.sql.*;
import javax.swing.*;

public class ComboBoxDatabaseComparison {
    public static void main(String[] args) {
        // 连接数据库
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "root";
        String password = "password";
        try {
            Connection connection = DriverManager.getConnection(url, username, password);

            // 查询数据库值
            String query = "SELECT name FROM mytable";
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery(query);

            // 创建JComboBox并添加数据库值
            JComboBox<String> comboBox = new JComboBox<>();
            while (resultSet.next()) {
                String value = resultSet.getString("name");
                comboBox.addItem(value);
            }

            // 获取JComboBox的选定值
            String selectedValue = (String) comboBox.getSelectedItem();

            // 比较值
            if (selectedValue.equals("某个数据库值")) {
                // 执行相应操作
                System.out.println("选定值与数据库值相等");
            } else {
                System.out.println("选定值与数据库值不相等");
            }

            // 关闭数据库连接
            resultSet.close();
            statement.close();
            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}