public SendResult syncSendOrderly(String destination, Message<?> message, String hashKey, long timeout) {
        if (Objects.isNull(message) || Objects.isNull(message.getPayload())) {
            log.error("syncSendOrderly failed. destination:{}, message is null ", destination);
            throw new IllegalArgumentException("`message` and `message.payload` cannot be null");
        }
        try {
            long now = System.currentTimeMillis();
          //在這里對消息進行了轉化，將Spring的message轉化為rocketmq自己的message
            org.apache.rocketmq.common.message.Message rocketMsg = RocketMQUtil.convertToRocketMessage(objectMapper,
                charset, destination, message);
            SendResult sendResult = producer.send(rocketMsg, messageQueueSelector, hashKey, timeout);
            long costTime = System.currentTimeMillis() - now;
            log.debug("send message cost: {} ms, msgId:{}", costTime, sendResult.getMsgId());
            return sendResult;
        } catch (Exception e) {
            log.error("syncSendOrderly failed. destination:{}, message:{} ", destination, message);
            throw new MessagingException(e.getMessage(), e);
        }
    }

        String[] tempArr = destination.split(":", 2);
        String topic = tempArr[0];
        String tags = "";
        if (tempArr.length > 1) {
            tags = tempArr[1];
        }

<dependency>
    <groupId>org.apache.rocketmq</groupId>
    <artifactId>rocketmq-spring-boot-starter</artifactId>
    <version>2.0.1</version>
</dependency>

    XXXEvent xxxDto = new XXXEvent();
    Message<XXXEvent> message = MessageBuilder.withPayload(xxxDto).build();
    String dest = String.format("%s:%s",topic-name","tag-name");
    //默認投遞：同步發(fā)送 不會丟失消息。如果在投遞成功后發(fā)生網絡異常，客戶端會認為投遞失敗而回滾本地事務
    this.rocketMQTemplate.send(dest, xxxDto);

//調用這段代碼之前別做會影響數據的操作
XXXEvent xxxDto = new XXXEvent();
Message<XXXEvent> message = MessageBuilder.withPayload(xxxDto).build();
String dest = String.format("%s:%s",topic-name","tag-name");
TransactionSendResult transactionSendResult = this.rocketMQTemplate.sendMessageInTransaction("poducer-name","topic-name:tag-name",message,"xxxid");
if (LocalTransactionState.ROLLBACK_MESSAGE.equals(transactionSendResult.getLocalTransactionState())){
    throw new RuntimeException("事務消息投遞失敗");
}
//按照RocketMQ的寫法，這個地方不應該有別的代碼

@RocketMQTransactionListener(txProducerGroup = "producer")
    class TransactionListenerImpl implements RocketMQLocalTransactionListener {
        
        //消息投遞成功后執(zhí)行的邏輯(半消息)
        //原文:When send transactional prepare(half) message succeed, this method will be invoked to execute local transaction.
        @Override
        public RocketMQLocalTransactionState executeLocalTransaction(Message msg, Object arg) {
            try{
                //
                xxxService.doSomething();
                return RocketMQLocalTransactionState.COMMIT;
            catch(IOException e){
                //不確定最終是否成功
                return RocketMQLocalTransactionState.UNKNOWN;
            }catch(Exception e){
                return RocketMQLocalTransactionState.ROLLBACK;
            }
        }
        //回查事務執(zhí)行狀態(tài)
        @Override
        public RocketMQLocalTransactionState checkLocalTransaction(Message msg) {
            Boolean result = xxxService.isSuccess(msg,arg);
            if(result != null){
                if(result){
                    return RocketMQLocalTransactionState.COMMIT;
                }else{
                    return RocketMQLocalTransactionState.ROLLBACK;
                }
            }
            return RocketMQLocalTransactionState.UNKNOWN;
        }
    }

import lombok.extern.slf4j.Slf4j;
import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
import org.apache.rocketmq.spring.core.RocketMQListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
@Slf4j
@Component
@RocketMQMessageListener(consumerGroup = "xxx-consumer", topic = "topic-name",selectorExpression = "tag-name")
public class XXXEventMQListener implements RocketMQListener<XXXEvent> {
    private  String repeatCheckRedisKeyTemplate = "topic-name:tag:repeat-check:%s";
    @Autowired private StringRedisTemplate redisTemplate;
    @Override
    public void onMessage(XXXEvent message) {
        log.info("consumer message {}",message);
        //處理消息
        try{
            xxxService.doSomething(message);
        }catch(Exception ex){
            log.warn(String.format("message [%s] 消費失敗",message),ex);
            //拋出異常后，MQClient會返回ConsumeConcurrentlyStatus.RECONSUME_LATER,這條消息會再次嘗試消費
            throw new RuntimException(ex);
        }
    }
}

public class DefaultMessageListenerConcurrently implements MessageListenerConcurrently {
    @SuppressWarnings("unchecked")
    @Override
    public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs, ConsumeConcurrentlyContext context) {
        for (MessageExt messageExt : msgs) {
            log.debug("received msg: {}", messageExt);
            try {
                long now = System.currentTimeMillis();
                rocketMQListener.onMessage(doConvertMessage(messageExt));
                long costTime = System.currentTimeMillis() - now;
                log.debug("consume {} cost: {} ms", messageExt.getMsgId(), costTime);
            } catch (Exception e) {
                log.warn("consume message failed. messageExt:{}", messageExt, e);
                context.setDelayLevelWhenNextConsume(delayLevelWhenNextConsume);
                return ConsumeConcurrentlyStatus.RECONSUME_LATER;
            }
        }
        return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
    }
}