class Application {

    public final JdbcTemplate jdbcTemplate;

    public final UserDao userDao;

    public static void main(String[] args) {
        SpringApplication.run(Application.class);
    }

    @Bean
    @Transactional
    public CommandLineRunner commandLineRunner() {<FILL_FUNCTION_BODY>}


}

        return (args) -> {
            String username = jdbcTemplate.queryForObject("select username from t_user where id = 2",
                    String.class);
            log.info("query username is : {}", username);

            List<Map<String, Object>> list = jdbcTemplate.queryForList("select id from t_user");
            log.info("total list: {}", list.size());

            userDao.update();
        };
    
<no_super_class>