oracle和mysql的连接方式

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

public class OracleConnectionExample {
    public static void main(String[] args) {
        String url = "jdbc:oracle:thin:@localhost:1521:orcl";
        String user = "username";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            System.out.println("Connected to Oracle database!");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

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 (Connection conn = DriverManager.getConnection(url, user, password)) {
            System.out.println("Connected to MySQL database!");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateConnectionExample {
    public static void main(String[] args) {
        Configuration config = new Configuration().configure();
        SessionFactory sessionFactory = config.buildSessionFactory();
        Session session = sessionFactory.openSession();

        System.out.println("Connected to database using Hibernate!");

        session.close();
        sessionFactory.close();
    }
}