RabbitMQ之Topics通配符模式

关注

原创最新推荐文章于 2026-05-08 10:12:34 发布 1.4k 阅读 AI 写同款· GEO 优化 ›

2023电赛B题实战解析：基于立创天空星开发板的同轴线缆长度与负载测量系统本文详细解析了2023年全国大学生电子设计竞赛B题的实战方案，重点介绍了基于立创EDA天空星开发板（STM32F103）的同轴线缆长度与负载测量系统。文章深入剖析了两种核心测量方案，并推荐了更稳定易实现的NE555测电容法，提供了从硬件选型、电路设计到软件编程、参数标定的完整“施工图”，实测精度可达厘米级和皮法级，为电赛复现与高精度测量学习提供了清晰指导。阅读详情

RabbitMQ之Topics通配符模式

说明：此模式实在路由key模式的基础上，使用了通配符来管理消费者接收消息。生产者P发送消息到交换机X，type=topic，交换机根据绑定队列的routing key的值进行通配符匹配；

符号#：匹配一个或者多个词lazy.# 可以匹配lazy.irs或者lazy.irs.cor
符号*：只能匹配一个词lazy.* 可以匹配lazy.irs或者lazy.cor

注意交换机的类型：direct fanout topic headers

“ * ”的使用

生产者：

package com.toov5.topic;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.toov5.utils.MQConnectionUtils;

//生产者 交换机类型 producerFanout类型
public class TopicProducer {
    //交换机名称
     private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
        //建立MQ连接
         Connection connection = MQConnectionUtils.newConnection();
        //创建通道
          Channel channel = connection.createChannel();
          //生产者绑定交换机
          channel.exchangeDeclare(EXCHANGE_NAME, "topic");  //交换机名称  交换机类型
          String routingKey="log.email";    //消息只会给邮件类型的
          //创建对应的消息 
          String msString = "my_Routing_destination_msg"+routingKey;
          //通过频道 发送消息
          System.out.println("生产者投递消息："+msString);
          channel.basicPublish(EXCHANGE_NAME, routingKey, null, msString.getBytes());
          //关闭通道 和 连接
          channel.close();
          connection.close();
    }
    
}

消费者：

package com.toov5.topic;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.AMQP.BasicProperties;
import com.toov5.utils.MQConnectionUtils;

//邮件消费者
public class ConsumerSMSTopic {
    private static final String SMS_QUEUE ="sms_queue_topic";
    //交换机名称
   private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
         System.out.println("短信消费者启动");
        //建立MQ连接
         Connection connection = MQConnectionUtils.newConnection(); 
        //创建通道
          Channel channel = connection.createChannel();
          
        //消费者声明队列
          channel.queueDeclare(SMS_QUEUE, false, false, false, null);
         //消费者队列绑定 路由
         channel.queueBind(SMS_QUEUE, EXCHANGE_NAME, "log.*");
          //消费者监听消息
      DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
              //重写监听方法
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                     throws IOException {             
                 String msg = new String(body,"UTF-8");
                 System.out.println("短信消费者获取生产者消息"+msg);
             }
         };
         channel.basicConsume(SMS_QUEUE,true, defaultConsumer);   //绑定队列 事件监听
            
    }
}

package com.toov5.topic;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.AMQP.BasicProperties;
import com.toov5.utils.MQConnectionUtils;

//邮件消费者
public class ConsumerEmailTopic {
    private static final String EMAIL_QUEUE ="email_queue_topic";
    //交换机名称
   private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
         System.out.println("邮件消费者启动");
        //建立MQ连接
         Connection connection = MQConnectionUtils.newConnection(); 
        //创建通道
          Channel channel = connection.createChannel();
          
        //消费者声明队列
          channel.queueDeclare(EMAIL_QUEUE, false, false, false, null);
         //消费者队列绑定 路由
          channel.queueBind(EMAIL_QUEUE, EXCHANGE_NAME, "log.email");
          //消费者监听消息
      DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
              //重写监听方法
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                     throws IOException {             
                 String msg = new String(body,"UTF-8");
                 System.out.println("邮件消费者获取生产者消息"+msg);
             }
         };
         channel.basicConsume(EMAIL_QUEUE,true, defaultConsumer);   //绑定队列 事件监听
            
    }
}

可以看到两个消费者都可以接收到

换成 “#”

生产者：

package com.toov5.topic;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.toov5.utils.MQConnectionUtils;

//生产者 交换机类型 producerFanout类型
public class TopicProducer {
    //交换机名称
     private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
        //建立MQ连接
         Connection connection = MQConnectionUtils.newConnection();
        //创建通道
          Channel channel = connection.createChannel();
          //生产者绑定交换机
          channel.exchangeDeclare(EXCHANGE_NAME, "topic");  //交换机名称  交换机类型
          String routingKey="log.email.sms";    //消息只会给邮件类型的
          //创建对应的消息 
          String msString = "my_Routing_destination_msg"+routingKey;
          //通过频道 发送消息
          System.out.println("生产者投递消息："+msString);
          channel.basicPublish(EXCHANGE_NAME, routingKey, null, msString.getBytes());
          //关闭通道 和 连接
          channel.close();
          connection.close();
    }
    
}

消费者：

package com.toov5.topic;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.AMQP.BasicProperties;
import com.toov5.utils.MQConnectionUtils;

//邮件消费者
public class ConsumerSMSTopic {
    private static final String SMS_QUEUE ="sms_queue_topic";
    //交换机名称
   private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
         System.out.println("短信消费者启动");
        //建立MQ连接
         Connection connection = MQConnectionUtils.newConnection(); 
        //创建通道
          Channel channel = connection.createChannel();
          
        //消费者声明队列
          channel.queueDeclare(SMS_QUEUE, false, false, false, null);
         //消费者队列绑定 路由
         channel.queueBind(SMS_QUEUE, EXCHANGE_NAME, "log.#");
          //消费者监听消息
      DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
              //重写监听方法
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                     throws IOException {             
                 String msg = new String(body,"UTF-8");
                 System.out.println("短信消费者获取生产者消息"+msg);
             }
         };
         channel.basicConsume(SMS_QUEUE,true, defaultConsumer);   //绑定队列 事件监听
            
    }
}

package com.toov5.topic;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.AMQP.BasicProperties;
import com.toov5.utils.MQConnectionUtils;

//邮件消费者
public class ConsumerEmailTopic {
    private static final String EMAIL_QUEUE ="email_queue_topic";
    //交换机名称
   private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
         System.out.println("邮件消费者启动");
        //建立MQ连接
         Connection connection = MQConnectionUtils.newConnection(); 
        //创建通道
          Channel channel = connection.createChannel();
          
        //消费者声明队列
          channel.queueDeclare(EMAIL_QUEUE, false, false, false, null);
         //消费者队列绑定 路由
          channel.queueBind(EMAIL_QUEUE, EXCHANGE_NAME, "log.email");
          //消费者监听消息
      DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
              //重写监听方法
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                     throws IOException {             
                 String msg = new String(body,"UTF-8");
                 System.out.println("邮件消费者获取生产者消息"+msg);
             }
         };
         channel.basicConsume(EMAIL_QUEUE,true, defaultConsumer);   //绑定队列 事件监听
            
    }
}