mysql无法使用jdbc连接

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?useSSL=false&serverTimezone=UTC";
        String user = "myuser";
        String password = "mypassword";

        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            Connection conn = DriverManager.getConnection(url, user, password);
            System.out.println("Connected to the database!");
            conn.close();
        } catch (ClassNotFoundException e) {
            System.out.println("MySQL JDBC driver not found!");
            e.printStackTrace();
        } catch (SQLException e) {
            System.out.println("Connection failed!");
            e.printStackTrace();
        }
    }
}