jdbc加载mysql的包

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

public class JDBCDemo {
    public static void main(String[] args) {
        Connection connection = null;
        try {
            // 加载MySQL驱动程序
            Class.forName("com.mysql.cj.jdbc.Driver");
            
            // 连接数据库
            String url = "jdbc:mysql://localhost:3306/mydatabase";
            String user = "username";
            String password = "password";
            connection = DriverManager.getConnection(url, user, password);
            
            System.out.println("成功连接到数据库！");
        } catch (ClassNotFoundException e) {
            System.out.println("找不到MySQL驱动程序类！");
            e.printStackTrace();
        } catch (SQLException e) {
            System.out.println("连接数据库失败！");
            e.printStackTrace();
        } finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}