java mysql语句错误

java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/mydatabase

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

public class MySQLExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase?useSSL=false&serverTimezone=UTC";
        String user = "your_username";
        String password = "your_password";

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

            // 建立连接
            Connection conn = DriverManager.getConnection(url, user, password);

            // 创建Statement对象
            Statement stmt = conn.createStatement();

            // 执行查询
            String sql = "SELECT * FROM mytable";
            ResultSet rs = stmt.executeQuery(sql);

            // 处理结果集
            while (rs.next()) {
                System.out.println(rs.getString("columnName"));
            }

            // 关闭资源
            rs.close();
            stmt.close();
            conn.close();
        } catch (ClassNotFoundException e) {
            System.out.println("MySQL JDBC driver not found.");
            e.printStackTrace();
        } catch (SQLException e) {
            System.out.println("SQL error occurred.");
            e.printStackTrace();
        }
    }
}