如何利用rabbitMq的死信队列实现延时消息

<dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-amqp</artifactId>
 </dependency>
 <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
 </dependency>

spring:
  application:
    name: ttl-queue
  rabbitmq:
    host: 110.40.181.73
    port: 35672
    username: root
    password: 10086
    virtual-host: /fchan
    connection-timeout: 15000
    # 发送确认
    #publisher-confirms: true
    # 路由失败回调
    publisher-returns: true
    template:
      # 必须设置成true 消息路由失败通知监听者，而不是将消息丢弃
      mandatory: true
    listener:
      simple:
        # 每次从RabbitMQ获取的消息数量
        prefetch: 1
        default-requeue-rejected: false
        # 每个队列启动的消费者数量
        concurrency: 1
        # 每个队列最大的消费者数量
        max-concurrency: 1
        # 签收模式为手动签收-那么需要在代码中手动ACK
        acknowledge-mode: manual

package com.fchan.mq.mqDelay.dlx;

import org.springframework.amqp.core.*;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MyRabConfig {

    //定义普通任务队列（其实就是一个普通队列，只是没有消费者）
    @Bean("delayQue")
    public Queue delayQue(){
        //普通队列绑定死信交换机及路由key

        //delayQueue延时队列
        return QueueBuilder.durable("delayQueue")
                //指定这个延时队列下的死信交换机
                //如果消息过时则会被投递到当前对应的my-dlx-exchange
                .withArgument("x-dead-letter-exchange", "my-dlx-exchange")
                //死信交换机绑定的路由key
                //如果消息过时,my-dlx-exchange会根据routing-key-delay投递消息到对应的队列
                //mq发送消息的时候一般指定的是exchange交换机+这个routingKey来找到队列，这个应该是出于有时候需要让mq的交换机将一个消息发送到多个队列所采用的方式
                .withArgument("x-dead-letter-routing-key", "routing-key-delay")
                .build();
    }

    //定义普通队列的交换机
    @Bean("delayExchange")
    public Exchange delayExchange(){
        return ExchangeBuilder.directExchange("delayExchange").build();
    }

    //绑定普通队列的交换机
    @Bean("delayBinding")
    public Binding delayBinding(@Qualifier("delayExchange") Exchange exchange, @Qualifier("delayQue") Queue queue){
        return BindingBuilder.bind(queue).to(exchange).with("delayBindingRoutingKey").noargs();
    }



    //定义死信队列
    @Bean("dlxQueue")
    public Queue dlxQueue(){
        return QueueBuilder.durable("my-dlx-queue").build();
    }


    //定义死信交换机，这里的死信交换机要和上面普通队列所绑定的交换机名称一致
    @Bean("dlxExchange")
    public Exchange dlxExchange(){
        return ExchangeBuilder.directExchange("my-dlx-exchange").build();
    }


    //绑定交换机与死信队列
    @Bean("dlxBinding")
    public Binding dlxBinding(@Qualifier("dlxExchange") Exchange exchange, @Qualifier("dlxQueue") Queue queue){
        //这儿这个routingKey要和上面正常队列中所绑定的死信routingKey一致
        return BindingBuilder.bind(queue).to(exchange).with("routing-key-delay").noargs();
    }

}

package com.fchan.mq.mqDelay;

import com.rabbitmq.client.Channel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

import java.util.Map;

@Component
public class MyRabbitConsume {
    Logger log = LoggerFactory.getLogger(MyRabbitConsume.class);

    @RabbitListener(queues = {"my-dlx-queue"})
    public void receiveDeadMessage(Map<String,Object> map, Message message, Channel channel) throws Exception {
        log.info("收到死信信息:{}",map);
        log.info("然后进行一系列逻辑处理 Thanks♪(･ω･)ﾉ");
		//手动确认消息        
		channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
    }

}

/**
 * 发送消息到延时队列 delayQueue
 * 消息5秒后会被投递到死信队列
 * @return
 */
@GetMapping("sendMsgToDelay")
public String sendMsgToDelay(String msg){
    Map<String,Object> map = new HashMap<>();
    map.put("msg", msg);
    rabbitTemplate.convertAndSend("delayExchange","delayBindingRoutingKey", map, new MessagePostProcessor() {
        @Override
        public Message postProcessMessage(Message message) throws AmqpException {
            //设置消息过期时间,5秒过期
            message.getMessageProperties().setExpiration("5000");
            return message;
        }
    });
    return msg;
}