找不到mysql driver

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

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

        try {
            // 加载MySQL JDBC驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            
            // 建立连接
            Connection connection = DriverManager.getConnection(url, user, password);
            System.out.println("数据库连接成功！");
            
            // 关闭连接
            connection.close();
        } catch (ClassNotFoundException e) {
            System.err.println("找不到MySQL JDBC驱动！");
            e.printStackTrace();
        } catch (SQLException e) {
            System.err.println("数据库连接失败！");
            e.printStackTrace();
        }
    }
}