1.Fanout Exchange介绍

Fanout Exchange 消息广播的模式，不管路由键或者是路由模式，会把消息发给绑定给它的全部队列，如果配置了routing_key会被忽略。

如上图所示，即当使用fanout交换器时，他会将消息广播到与该交换器绑定的所有队列上，这有利于你对单条消息做不同的反应。

例如存在以下场景：一个web服务要在用户完善信息时，获得积分奖励，这样你就可以创建两个对列，一个用来处理用户信息的请求，另一个对列获取这条消息是来完成积分奖励的任务。

2.代码示例

1）.Queue配置类

FanoutRabbitConfig.java类：

package com.example.rabbitmqfanout;import org.springframework.amqp.core.Binding;import org.springframework.amqp.core.BindingBuilder;import org.springframework.amqp.core.FanoutExchange;import org.springframework.amqp.core.Queue;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class FanoutRabbitConfig { //创建队列 @Bean public Queue AMessage() { return new Queue("fanout.A"); } //创建队列 @Bean public Queue BMessage() { return new Queue("fanout.B"); } //创建队列 @Bean public Queue CMessage() { return new Queue("fanout.C"); } //创建Fanout交换器 @Bean FanoutExchange fanoutExchange() { return new FanoutExchange("fanoutExchange"); } //将对列绑定到Fanout交换器 @Bean Binding bindingExchangeA(Queue AMessage,FanoutExchange fanoutExchange) { return BindingBuilder.bind(AMessage).to(fanoutExchange); } //将对列绑定到Fanout交换器 @Bean Binding bindingExchangeB(Queue BMessage, FanoutExchange fanoutExchange) { return BindingBuilder.bind(BMessage).to(fanoutExchange); } //将对列绑定到Fanout交换器 @Bean Binding bindingExchangeC(Queue CMessage, FanoutExchange fanoutExchange) { return BindingBuilder.bind(CMessage).to(fanoutExchange); } }

2）.消息生产者

FanoutSender.java类:

package com.example.rabbitmqfanout.rabbitmq;import org.springframework.amqp.core.AmqpTemplate;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;@Componentpublic class FanoutSender { @Autowired private AmqpTemplate rabbitTemplate; public void send() { String context = "hi, fanout msg "; System.out.println("Sender : " + context); this.rabbitTemplate.convertAndSend("fanoutExchange","", context); }}

3）.消息消费者

FanoutReceiverA.java类：

package com.example.rabbitmqfanout.rabbitmq;import org.springframework.amqp.rabbit.annotation.RabbitHandler;import org.springframework.amqp.rabbit.annotation.RabbitListener;import org.springframework.stereotype.Component;@Component@RabbitListener(queues = "fanout.A")public class FanoutReceiverA { @RabbitHandler public void process(String message) { System.out.println("fanout Receiver A : " + message); }}

FanoutReceiverB.java类：

package com.example.rabbitmqfanout.rabbitmq;import org.springframework.amqp.rabbit.annotation.RabbitHandler;import org.springframework.amqp.rabbit.annotation.RabbitListener;import org.springframework.stereotype.Component;@Component@RabbitListener(queues = "fanout.B")public class FanoutReceiverB { @RabbitHandler public void process(String message) { System.out.println("fanout Receiver B: " + message); }}

FanoutReceiverC.java类：

package com.example.rabbitmqfanout.rabbitmq;import org.springframework.amqp.rabbit.annotation.RabbitHandler;import org.springframework.amqp.rabbit.annotation.RabbitListener;import org.springframework.stereotype.Component;@Component@RabbitListener(queues = "fanout.C")public class FanoutReceiverC { @RabbitHandler public void process(String message) { System.out.println("fanout Receiver C: " + message); }}

4）.测试

FanoutTest.java类：

package com.example.rabbitmqfanout.rabbitmq;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest;import org.springframework.test.context.junit4.SpringRunner;@RunWith(SpringRunner.class)@SpringBootTestpublic class FanoutTest { @Autowired private FanoutSender sender; @Test public void fanoutSender() throws Exception { sender.send(); }}

以上所述是小编给大家介绍的spring boot整合RabbitMQ（Fanout模式），希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！