mysql数据库驱动是什么文件后缀名

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

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

        try {
            // 加载MySQL驱动
            Class.forName("com.mysql.cj.jdbc.Driver");

            // 建立连接
            Connection connection = DriverManager.getConnection(url, user, password);
            System.out.println("Connected to the database!");

            // 关闭连接
            connection.close();
        } catch (ClassNotFoundException e) {
            System.out.println("MySQL JDBC driver not found!");
            e.printStackTrace();
        } catch (SQLException e) {
            System.out.println("Connection failed!");
            e.printStackTrace();
        }
    }
}