<dependency>
    <groupId>org.apache.rocketmq</groupId>
    <artifactId>rocketmq-spring-boot-starter</artifactId>
    <version>2.1.1</version>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <version>2.1.1.RELEASE</version>
</dependency>

rocketmq:
  producer:
    group: ldProducer
  name-server: 192.168.3.158:9876

@Component
@RocketMQMessageListener(consumerGroup = "ldConsumer", topic = "ldDelayTaskTopic")
@Slf4j
public class LdRocketMQListener implements RocketMQListener<String> {
    @Override
    public void onMessage(String msg) {
        log.info("获取到延迟任务消息:{}",msg);
    }
}

@RestController
@Slf4j
public class RocketMQDelayTaskController {

    @Resource
    private DefaultMQProducer producer;

    @GetMapping("/rocketmq/add")
    public void addTask(@RequestParam("task") String task) throws Exception {
        Message msg = new Message("ldDelayTaskTopic", "TagA", task.getBytes(RemotingHelper.DEFAULT_CHARSET));
        msg.setDelayTimeLevel(2);
        // 发送消息并得到消息的发送结果，然后打印
        log.info("提交延迟任务");
        producer.send(msg);
    }

}