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import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessagePostProcessor;

@Test  
public void testSendMessageTTL() {  
  
    // 1、创建消息后置处理器对象  
    MessagePostProcessor messagePostProcessor = (Message message) -> {  
  
        // 设定 TTL 时间，以毫秒为单位
        message.getMessageProperties().setExpiration("5000");  
  
        return message;
    };
  
    // 2、发送消息  
    rabbitTemplate.convertAndSend(    
            EXCHANGE_DIRECT,     
            ROUTING_KEY,     
            "Hello atguigu", messagePostProcessor);    
}