02.RabbitMQ整合springboot简单使用

1.添加依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-amqp</artifactId>
</dependency>

2. 配置yml文件

spring:
  rabbitmq:
    host: ip
    port: 5672
    password: *****
    username: *****
    virtual-host: /dev_virtual

3.引入springboot中的注解和类

• 启动类增加 @EnableRabbit注解
• 引入rabbitmq管理类

   @Autowired
    private RabbitTemplate rabbitTemplate;//用于消息处理
    @Autowired
    private RabbitAdmin rabbitAdmin; //用于管理组件

4.测试DIRECT模式消息队列

• 代码创建exchange和queue

  @Test
    public void buildRabbit(){
        //交换机
        Exchange exchange = new ExchangeBuilder("exchange_direct", ExchangeTypes.DIRECT).durable(true).build();
        rabbitAdmin.declareExchange(exchange);
        //队列
        Queue queue = QueueBuilder.durable("queue_lpf").build();
        rabbitAdmin.declareQueue(queue);
        //绑定
        Binding binding = BindingBuilder.bind(queue).to(exchange).with("mq_key").noargs();
        rabbitAdmin.declareBinding(binding);
        String beanName = rabbitAdmin.getBeanName();
        System.out.println("buildRabbit"+beanName);
    }

• provider发送消息

  @Test
    public void sendRabbitInfo() {
        CorrelationData data = new CorrelationData(UUID.randomUUID().toString().replace("-", ""));
        Book book = new Book("红楼梦","曹雪芹");
        rabbitTemplate.convertAndSend("exchange_direct", "mq_key", sendMessage,data);
    }

• consumer接收发送的消息

  @RabbitListener(queues="queue_lpf")
  public void getMessage(Map message){
      System.out.println("********************************************************");
      System.out.println(message);
      System.out.println("********************************************************");
  }

5.测试TOPIC模式发送数据

• 代码创建EXCHANGE 和 QUEUE

@Test
    public void buildTopicRabbit(){
        Exchange topicExchange = new ExchangeBuilder("topic_exchange", ExchangeTypes.TOPIC).durable(true).build();
        rabbitAdmin.declareExchange(topicExchange);
        Queue queue1 = QueueBuilder.durable("queue_topic").build();
        rabbitAdmin.declareQueue(queue1);
        Queue queue2 = QueueBuilder.durable("queue_lpf").build();
        rabbitAdmin.declareQueue(queue2);
        Queue queue3 = QueueBuilder.durable("topic_lpf").build();
        rabbitAdmin.declareQueue(queue3);
        //队列和交换器绑定
        Binding binding = BindingBuilder.bind(queue1).to(topicExchange).with("#.topic").noargs();
        Binding binding1 = BindingBuilder.bind(queue2).to(topicExchange).with("queue.#").noargs();
        Binding binding2 = BindingBuilder.bind(queue3).to(topicExchange).with("#.lpf").noargs();
        rabbitAdmin.declareBinding(binding);
        rabbitAdmin.declareBinding(binding1);
        rabbitAdmin.declareBinding(binding2);
    }

• privider 发送消息

 @Test
    public void sendMsg(){
        CorrelationData data = new CorrelationData(UUID.randomUUID().toString().replace("-", ""));
        String message="this is a topic message(queue.lpf is the routingkey)";
        rabbitTemplate.convertAndSend("topic_exchange","queue.lpf", (Object) message,data);
    }

• 在management管理页面查看收到的信息
  
  

6.遇到的问题

问题1：org.springframework.amqp.AmqpIllegalStateException: Fatal exception on listener startup

看到很多人说是rabbitmq账号的权限问题，经过多番测试无果。
根据 报错详细，发现是有一个@RabbitListener 监听队列 ，这个队列没有创建。所以造成了这个问题。
注释掉久可以了。