生產者傳送訊息到交換機並指定一個路由key，消費者佇列繫結到交換機時要制定路由key（key匹配就能接受訊息，key不匹配就不能接受訊息）

例如：我們可以把路由key設定為insert ，那麼消費者佇列key指定包含insert才可以接收訊息，消費者佇列key定義為update或者delete就不能接收訊息。很好的控制了更新，插入和刪除的操作。

採用交換機direct模式

前面做的demo中RoutingKey設定的空

zl介紹不為空的情況，如果不為空，那麼 經過訊息佇列之後，需要在經過 RoutingKey進行判斷決定 消費者

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.toov5.rabibitMQScribe</groupId>
  <artifactId>rabibitMQScribe</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
  <dependencies>
		<dependency>
			<groupId>com.rabbitmq</groupId>
			<artifactId>amqp-client</artifactId>
			<version>3.6.5</version>
		</dependency>
	</dependencies>
  
</project>

　producer

package com.toov5.routing;

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 RoutingProducer {
    
 
//交換機名稱
     private static final String EXCHANGE_NAME = "my_routing"; 
     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, "direct");  //交換機名稱  交換機型別
          String routingKey="email";
          //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();
    }
    
} 

consumer:

package com.toov5.routing;

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 ConsumerEmailRouting {
    private static final String EMAIL_QUEUE ="email_queue_routing";
    //交換機名稱
   private static final String EXCHANGE_NAME = "my_routing"; 
     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, "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
            
    }
}

package com.toov5.routing;

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 ConsumerSMSRouting {
    private static final String SMS_QUEUE ="sms_queue_routing";
    //交換機名稱
   private static final String EXCHANGE_NAME = "my_routing"; 
     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, "email");
         channel.queueBind(SMS_QUEUE, EXCHANGE_NAME, "sms");
          //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(SMS_QUEUE,true, defaultConsumer);   //繫結佇列 事件監聽
            
    }
}

執行結果：

繫結兩個：