SpringBoot ApplicationRunner 项目启动时自动执行对应方法

@Component
public class StartListener implements ApplicationRunner {
    @Autowired
    private AdMapper adMapper;
    @Autowired
    private RabbitTemplate rabbitTemplate;
    @Override
    public void run(ApplicationArguments args) throws Exception {
        List ads = adMapper.selectAll();

        for (Ad ad : ads) {
            String position = ad.getPosition();
            rabbitTemplate.convertAndSend("", RabbitMQConfig.AD_UPDATE_QUEUE,ad.getPosition());
            // 只将当前 行数据 中的position 值发送到 rabbitMQ 中
            System.out.println("项目启动时读取数据:"+ad.getPosition());
        }
    }
}