dbcp mysql连不上

import org.apache.commons.dbcp2.BasicDataSource;
import java.sql.Connection;
import java.sql.SQLException;

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

        BasicDataSource dataSource = new BasicDataSource();
        dataSource.setUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
        dataSource.setMaxTotal(10);
        dataSource.setMaxIdle(5);
        dataSource.setMinIdle(2);
        dataSource.setMaxWaitMillis(1000);

        try (Connection connection = dataSource.getConnection()) {
            System.out.println("Connected to the database!");
        } catch (SQLException e) {
            System.err.println("Failed to connect to the database: " + e.getMessage());
        }
    }
}