八、rabbbitMQ主题模式 (Topic)

最新推荐文章于 2025-06-01 18:29:28 发布

Carl_Plus

最新推荐文章于 2025-06-01 18:29:28 发布

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CC 4.0 BY-SA版权

文章标签： rabbitMQ

本文链接：https://blog.youkuaiyun.com/hlxx55/article/details/81024868

本文通过实战演示了如何使用 RabbitMQ 的 Topic Exchange 进行消息传递。具体包括生产者发布消息到指定的 Topic Exchange，以及两个消费者分别通过不同的绑定键接收消息的过程。

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1.模型

解读：

Topic Exchange 将路由键和某模式进行匹配

# 匹配一个或多个

* 匹配一个

2.实例开发

（1）生产者

import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.demo.rabbitMQ.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
public class Produces {

private static final String EXCHANGE_NAME="test_exchange_topic";

public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection connection = ConnectionUtils.getConnection();
//创建队列
Channel channel = connection.createChannel();
//声明交换机
channel.exchangeDeclare(EXCHANGE_NAME, "topic");
String msg="goods";
//发送消息
channel.basicPublish(EXCHANGE_NAME, "good.delete", null, msg.getBytes());
System.out.println("============消息已发送！=============");
channel.close();
connection.close();

}
}

（2）消费者1

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

import com.demo.rabbitMQ.util.ConnectionUtils;
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;

public class Consumer1 {
//队列
private static final String QUEUE_NAME="test_queues_topic1";
//交换机
private static final String EXCHANGE_NAME="test_exchange_topic";

public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection connection = ConnectionUtils.getConnection();
//创建对列
Channel channel = connection.createChannel();
//声明队列
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
//绑定路由和交换机
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "good.add");
//保证一次只分发一个
channel.basicQos(1);
//定义一个消费者
DefaultConsumer defaultConsumer = new DefaultConsumer(channel)
{
//一旦有消息就会触发该方法
@Override
public void handleDelivery(String consumerTag,Envelope envelope,BasicProperties basicProperties,byte[] body) throws IOException
{
String msg=new String(body,"utf-8");
System.out.println("消费者1===========:"+msg);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally
{
System.out.println("=================consumer1 over================");
//手动应答
channel.basicAck(envelope.getDeliveryTag(), false);
}
}
};
//关闭自动应答
boolean autoAck=false;
//监听队列
channel.basicConsume(QUEUE_NAME, autoAck, defaultConsumer);

}

}

(2)消费者2

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

import com.demo.rabbitMQ.util.ConnectionUtils;
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;

public class Consumer2 {
//队列
private static final String QUEUE_NAME="test_queues_topic2";
//交换机
private static final String EXCHANGE_NAME="test_exchange_topic";

public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection connection = ConnectionUtils.getConnection();
//创建对列
Channel channel = connection.createChannel();
//声明队列
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
//绑定路由和交换机
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "good.#");
//保证一次只分发一个
channel.basicQos(1);
//定义一个消费者
DefaultConsumer defaultConsumer = new DefaultConsumer(channel)
{
//一旦有消息就会触发该方法
@Override
public void handleDelivery(String consumerTag,Envelope envelope,BasicProperties basicProperties,byte[] body) throws IOException
{
String msg=new String(body,"utf-8");
System.out.println("消费者2===========:"+msg);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally
{
System.out.println("=================consumer2 over================");
//手动应答
channel.basicAck(envelope.getDeliveryTag(), false);
}
}
};
//关闭自动应答
boolean autoAck=false;
//监听队列
channel.basicConsume(QUEUE_NAME, autoAck, defaultConsumer);

}

}

源码：https://github.com/Carlutf8/rabbitMQ