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回调函数confirm中的correlationData=null

// 实现confirm回调,发送到和没发送到exchange,都触发
@Override
public void confirm(CorrelationData correlationData, boolean ack, String cause) {// 参数说明:// correlationData: 相关数据,可以在发送消息时,进行设置该参数// ack: 结果// cause: 原因if (ack) {log.info("【ConfirmCallback】消息已经送达Exchange，ack已发");} else {ReturnedMessage message = correlationData.getReturned();if (message != null) {String msgData = new String(message.getMessage().getBody());log.error("消息发送到 exchange {} 失败,原因: {},id: {}, routingKey: {},body: {}", message.getExchange(), cause, correlationData.getId(), message.getRoutingKey(), msgData);} else {log.error("消息发送 exchange 失败,原因: {},id: {}", correlationData.getId(),cause);}}
}

解决办法

在convertAndSend方法中传入correlationData数据

@SpringBootTest
class RabbitmqDemoApplicationTests {@Testvoid contextLoads() {// 模拟消息BattleSubmitMqVo msg = new BattleSubmitMqVo().setUserId(1L).setRoomId("123").setTimes(300L);// 工具类发送消息到mqMqUtil.sendMsgToMq(RabbitConfig.BATTLE_PAPER_EXCHANGE,RabbitConfig.BATTLE_PAPER_ROUTING_KEY, msg);}}

工具类

package com.example.rabbitmqdemo.util;import cn.hutool.json.JSONUtil;
import com.sun.istack.internal.NotNull;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessagePostProcessor;
import org.springframework.amqp.core.ReturnedMessage;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;import javax.annotation.PostConstruct;/*** desc:** @author qts* @date 2023/11/3 0003*/
@Component
public class MqUtil {private static RabbitTemplate rabbitTemplate;@Autowiredprivate RabbitTemplate rabbitTemplate2;@PostConstructpublic void init(){rabbitTemplate = rabbitTemplate2;}/*** 发送消息并* 添加 CorrelationData数据* @param exchange* @param routingKey* @param msg*/public static void sendMsgToMq(String exchange, String routingKey, Object msg){CorrelationData correlationData = new CorrelationData();correlationData.setReturned(new ReturnedMessage(new Message(JSONUtil.toJsonStr(msg).getBytes()),1,"1",exchange,routingKey));rabbitTemplate.convertAndSend(exchange,routingKey,msg,correlationData);}/*** 发送消息* 添加 CorrelationData数据, 消息后处理回调* @param exchange* @param routingKey* @param msg* @param messagePostProcessor 消息后处理回调*/public static void sendMsgToMq(String exchange, String routingKey, Object msg,MessagePostProcessor messagePostProcessor){CorrelationData correlationData = new CorrelationData();correlationData.setReturned(new ReturnedMessage(new Message(JSONUtil.toJsonStr(msg).getBytes()),1,"1",exchange,routingKey));rabbitTemplate.convertAndSend(exchange,routingKey,msg,messagePostProcessor,correlationData);}
}

效果

得到了值

springboot集成rabbitmq