RabbitMQ可以设置消息的存活时间（Time To Live，简称TTL），当消息到达存活时间后还没有被消费，会被移出队列。RabbitMQ可以对队列的所有消息设置存活时间，也可以对某条消息设置存活时间。

@Configuration
public class RabbitConfig2 {private final String EXCHANGE_NAME="my_topic_exchange2";private final String QUEUE_NAME="my_queue2";// 1.创建交换机@Bean("bootExchange2")public Exchange getExchange2(){return ExchangeBuilder.topicExchange(EXCHANGE_NAME).durable(true).build();}// 2.创建队列@Bean("bootQueue2")public Queue getMessageQueue2(){return QueueBuilder.durable(QUEUE_NAME).ttl(10000) //队列的每条消息存活10s.build();}// 3.将队列绑定到交换机@Beanpublic Binding bindMessageQueue2(@Qualifier("bootExchange2") Exchange exchange, @Qualifier("bootQueue2") Queue queue){return BindingBuilder.bind(queue).to(exchange).with("my_routing").noargs();}
}