RabbitMQ中topic模式下设置的routingKey范围

在使用RabbitMQ的topic模式时，发现不管怎么改变路由键的范围，消费者都能获取消息，先看一下代码
生产者：

public class Send {

    private static final String EXCHANGE_NAME = "topic_exchange";
    private static final String ROUTE_KEY = "red.apple.ss";

    public static void main(String[] args) throws IOException, TimeoutException {
        Connection connection = ConnectionUtils.getConnection();
        Channel channel = connection.createChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.TOPIC);
        String msg = "topic exchange";
        channel.basicPublish(EXCHANGE_NAME, ROUTE_KEY, null, msg.getBytes());
        System.out.println(" [x] Sent '" + msg + "'");
        channel.close();
        connection.close();
    }
}

消费者

public class Recv1 {

    private static final String EXCHANGE_NAME = "topic_exchange";
    private static final String QUEUE_NAME = "apple_queue";

    public static void main(String[] args) throws IOException, TimeoutException {
        Connection connection = ConnectionUtils.getConnection();
        Channel channel = connection.createChannel();
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "*.apple.*");
        DefaultConsumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                String msg = new String(body);
                System.out.println(envelope.getRoutingKey());
                System.out.println(" [消费者1] received : " + msg + "!");
            }
        };
        channel.basicConsume(QUEUE_NAME, true, consumer);
    }
}

此时生产者绑定的路由键为red.apple.ss，而消费者绑定的路由键为*.apple.*，此时消费者能获取到消息。

image.png

到这里都很正常，但是我把消费者绑定的路由键改为*.banana.*后，消费者居然还能获取到消息

image.png
这就很不科学，后来发现，其实导致这个问题的原因就在于多次在代码里改变了routingkey的范围，每次更改都会在RabbitMQ中添加范围，但代码修改后，该范围仍然存在。虽然我后来把路由键的范围改为了*.banana.*，但 *.apple.* 的范围依旧存在，也就是说同时绑定了两个路由键。所以我们只要去RabbitMQ控制页面Exchange里bindings里的绑定删掉，重新运行即可。
image.png

果然这里绑定了两个路由键，删掉范围为*.apple.*的路由键，重新运行，就接收不到消息了，问题解决。