DirectExchange:

路由模式模型

代码实现

        直接通过注解方式绑定交换机和队列，这里边加了key也就是BingdingKey绑定key，可以看作交换机的路由规则，交换机收到消息后读取消息中指定的Routingkey发送到存有相应BingdingKey的队列中。

@RabbitListener(
            bindings = @QueueBinding(
                    value = @Queue(name = "direct.queue1"),
                    exchange = @Exchange(name = "itcast.direct",type = ExchangeTypes.DIRECT),
                    key = {"red","blue"}
            )
    )
    public void listenDirectQueue1(String msg){
        System.out.println("从queue1中获取到了消息:"+msg);
    }

    @RabbitListener(
            bindings = @QueueBinding(
                    value = @Queue(name = "direct.queue2"),
                    exchange = @Exchange(name = "itcast.direct",type = ExchangeTypes.DIRECT),
                    key = {"red","yellow"}
            )
    )
    public void listenDirectQueue2(String msg){
        System.out.println("从queue2中获取到了消息:"+msg);
    }

然后编写publisher消费者的代码:

@Test
    public void testDirectExchangeSend() {
        //发送消息
        String DirectChangeName = "itcast.direct";//交换机的名字
        String msg = "我是direct交换机发送的消息";
        for (int i = 0; i < 10; i++) {
            rabbitTemplate.convertAndSend(DirectChangeName, "red", msg+i);
        }
        for (int i = 0; i < 10; i++) {
            rabbitTemplate.convertAndSend(DirectChangeName, "yellow", msg+i);

        }
    }

两个队列的BingingKey中都有red 所以两个都接收到了

当RoutingKey是yellow时候只有一个接收到了 因为只有那一个交换机里BingingKey里有yellow

能看到控制台接收并打印的消息

也可以看到队列

总结: