RabbitMQ安装以及SpringBoot整合

1、Docker安装RabbitMQ

#拉取rabbitmq镜像
docker pull rabbitmq

#启动RabbitMQ
docker run -d --hostname my-rabbit --name rabbit -p 15672:15672 -p 5672:5672 rabbitmq

#安装图形化插件
#进入容器
docker exec -it 容器id /bin/bash
#安装插件
rabbitmq-plugins enable rabbitmq_management

注意：
你在操作图形化界面时，可能会出现该问题：Management API returned status code 500，如下图：
在这里插入图片描述

解决方案：

#进入rabbitmq容器，修改配置文件
docker exec -it 容器id /bin/bash
cd /etc/rabbitmq/conf.d/
echo management_agent.disable_metrics_collector = false > management_agent.disable_metrics_collector.conf
exit

运行成功后可以访问：localhost:15672 初始化账号和密码为：guest
远端服务器如果访问不到，注意是否忘记安全组设置开放端口
在这里插入图片描述

2、SpringBoot集成RabbitMQ

2.1 引入依赖

父类pom文件

<parent>
        <artifactId>spring-boot-parent</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.6.0</version>
 </parent>


 <!--依赖-->
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

2.2 创建生产者项目producer

application.yml

server:
  port: 8081

spring:
  rabbitmq:
    host: localhost
    port: 5672
    virtual-host: /
    username: guest
    password: guest

RabbitMQConfig

@Configuration
public class RabbitMQConfig {

    /**
     * 创建交换机
     * @return
     */
    @Bean(name = "itemTopicExchange")
    public Exchange createTopicExchange(){
        return ExchangeBuilder.topicExchange("item_topic_exchange").build();
    }

    /**
     * 创建消息队列
     * @return
     */
    @Bean(name = "itemQueue")
    public Queue createItemQueue(){
        return QueueBuilder.durable("item_queue").build();
    }

    /**
     * 队列绑定交换机
     * @param queue
     * @param exchange
     * @return
     */
    @Bean
    public Binding bindingQueueToExchange(@Qualifier("itemQueue") Queue queue,
                                          @Qualifier("itemTopicExchange") Exchange exchange){
        return BindingBuilder.bind(queue).to(exchange).with("item.#").noargs();
    }
}

TopicController

@RestController
@RequestMapping("/topic")
public class TopicController {

    //用于发送MQ消息
    @Autowired
    private RabbitTemplate rabbitTemplate;

    @GetMapping("/send")
    public String sendMessageToTopicQueue(){
        rabbitTemplate.convertAndSend("item_topic_exchange", "item.insert", "商品新增，routing key 为item.insert");
        rabbitTemplate.convertAndSend("item_topic_exchange", "item.update", "商品修改，routing key 为item.update");
        rabbitTemplate.convertAndSend("item_topic_exchange", "item.delete", "商品删除，routing key 为item.delete");
        return "生产者发送消息到消息队列";
    }
}

2.3 创建消费者工程

application.yml

server:
  port: 8082

spring:
  rabbitmq:
    host: localhost
    port: 5672
    virtual-host: /
    username: guest
    password: guest

消息监听MessageListener

@Component
public class MessageListener {

    /**
     * 监听某个队列的消息
     * @param message 接收到的消息
     */
    @RabbitListener(queues = "item_queue")
    public void myListener(String message){
        System.out.println("消费者接收到的消息" + message);
    }
}