查找已安装的JDBC驱动程序

import java.sql.*;

public class DatabaseConnection {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";

        try {
            Connection connection = DriverManager.getConnection(url, user, password);
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery("SELECT * FROM customers");

            while (resultSet.next()) {
                String customerId = resultSet.getString("customer_id");
                String name = resultSet.getString("name");
                String email = resultSet.getString("email");

                System.out.println("Customer ID: " + customerId);
                System.out.println("Name: " + name);
                System.out.println("Email: " + email);
            }

            resultSet.close();
            statement.close();
            connection.close();
        } catch (SQLException e) {
            System.out.println("SQLException: " + e.getMessage());
        }
    }
}