說明：此模式實在路由key模式的基礎上，使用了萬用字元來管理消費者接收訊息。生產者P傳送訊息到交換機X，type=topic，交換機根據繫結佇列的routing key的值進行萬用字元匹配；

符號#：匹配一個或者多個詞lazy.# 可以匹配lazy.irs或者lazy.irs.cor
符號*：只能匹配一個詞lazy.* 可以匹配lazy.irs或者lazy.cor

“ * ”的使用

生產者：

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;

//生產者 交換機型別 producerFanout型別
public class TopicProducer {
    //交換機名稱
     private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
        
 
//建立MQ連線
         Connection connection = MQConnectionUtils.newConnection();
        //建立通道
          Channel channel = connection.createChannel();
          //生產者繫結交換機
          channel.exchangeDeclare(EXCHANGE_NAME, "topic");  //交換機名稱  交換機型別
          String routingKey="log.email";    //訊息只會給郵件型別的
          
 
//建立對應的訊息 
          String msString = "my_Routing_destination_msg"+routingKey;
          //通過頻道 傳送訊息
          System.out.println("生產者投遞訊息："+msString);
          channel.basicPublish(EXCHANGE_NAME, routingKey, null, msString.getBytes());
          //關閉通道 和 連線
          channel.close();
          connection.close();
    }
    
} 

消費者：

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;

//郵件消費者
public class ConsumerSMSTopic {
    private static final String SMS_QUEUE ="sms_queue_topic";
    //交換機名稱
   private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
         System.out.println("簡訊消費者啟動");
        //建立MQ連線
         Connection connection = MQConnectionUtils.newConnection(); 
        //建立通道
          Channel channel = connection.createChannel();
          
        //消費者宣告佇列
          channel.queueDeclare(SMS_QUEUE, false, false, false, null);
         //消費者佇列繫結 路由
         channel.queueBind(SMS_QUEUE, EXCHANGE_NAME, "log.*");
          //消費者監聽訊息
      DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
              //重寫監聽方法
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                     throws IOException {             
                 String msg = new String(body,"UTF-8");
                 System.out.println("簡訊消費者獲取生產者訊息"+msg);
             }
         };
         channel.basicConsume(SMS_QUEUE,true, defaultConsumer);   //繫結佇列 事件監聽
            
    }
}

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;

//郵件消費者
public class ConsumerEmailTopic {
    private static final String EMAIL_QUEUE ="email_queue_topic";
    //交換機名稱
   private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
         System.out.println("郵件消費者啟動");
        //建立MQ連線
         Connection connection = MQConnectionUtils.newConnection(); 
        //建立通道
          Channel channel = connection.createChannel();
          
        //消費者宣告佇列
          channel.queueDeclare(EMAIL_QUEUE, false, false, false, null);
         //消費者佇列繫結 路由
          channel.queueBind(EMAIL_QUEUE, EXCHANGE_NAME, "log.email");
          //消費者監聽訊息
      DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
              //重寫監聽方法
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                     throws IOException {             
                 String msg = new String(body,"UTF-8");
                 System.out.println("郵件消費者獲取生產者訊息"+msg);
             }
         };
         channel.basicConsume(EMAIL_QUEUE,true, defaultConsumer);   //繫結佇列 事件監聽
            
    }
}

可以看到兩個消費者都可以接收到

 換成 “#”

生產者：

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;

//生產者 交換機型別 producerFanout型別
public class TopicProducer {
    //交換機名稱
     private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
        //建立MQ連線
         Connection connection = MQConnectionUtils.newConnection();
        //建立通道
          Channel channel = connection.createChannel();
          //生產者繫結交換機
          channel.exchangeDeclare(EXCHANGE_NAME, "topic");  //交換機名稱  交換機型別
          String routingKey="log.email.sms";    //訊息只會給郵件型別的
          //建立對應的訊息 
          String msString = "my_Routing_destination_msg"+routingKey;
          //通過頻道 傳送訊息
          System.out.println("生產者投遞訊息："+msString);
          channel.basicPublish(EXCHANGE_NAME, routingKey, null, msString.getBytes());
          //關閉通道 和 連線
          channel.close();
          connection.close();
    }
    
} 

消費者：

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;

//郵件消費者
public class ConsumerSMSTopic {
    private static final String SMS_QUEUE ="sms_queue_topic";
    //交換機名稱
   private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
         System.out.println("簡訊消費者啟動");
        //建立MQ連線
         Connection connection = MQConnectionUtils.newConnection(); 
        //建立通道
          Channel channel = connection.createChannel();
          
        //消費者宣告佇列
          channel.queueDeclare(SMS_QUEUE, false, false, false, null);
         //消費者佇列繫結 路由
         channel.queueBind(SMS_QUEUE, EXCHANGE_NAME, "log.#");
          //消費者監聽訊息
      DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
              //重寫監聽方法
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                     throws IOException {             
                 String msg = new String(body,"UTF-8");
                 System.out.println("簡訊消費者獲取生產者訊息"+msg);
             }
         };
         channel.basicConsume(SMS_QUEUE,true, defaultConsumer);   //繫結佇列 事件監聽
            
    }
}

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;

//郵件消費者
public class ConsumerEmailTopic {
    private static final String EMAIL_QUEUE ="email_queue_topic";
    //交換機名稱
   private static final String EXCHANGE_NAME = "my_topic"; 
     public static void main(String[] args) throws IOException, TimeoutException {
         System.out.println("郵件消費者啟動");
        //建立MQ連線
         Connection connection = MQConnectionUtils.newConnection(); 
        //建立通道
          Channel channel = connection.createChannel();
          
        //消費者宣告佇列
          channel.queueDeclare(EMAIL_QUEUE, false, false, false, null);
         //消費者佇列繫結 路由
          channel.queueBind(EMAIL_QUEUE, EXCHANGE_NAME, "log.email");
          //消費者監聽訊息
      DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
              //重寫監聽方法
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                     throws IOException {             
                 String msg = new String(body,"UTF-8");
                 System.out.println("郵件消費者獲取生產者訊息"+msg);
             }
         };
         channel.basicConsume(EMAIL_QUEUE,true, defaultConsumer);   //繫結佇列 事件監聽
            
    }
}

總結 “*” 匹配一個詞   “#”匹配多個詞