RabbitMQ---Topic模型

Topic类型的Exchange与Direct相比，都是可以根据Routingkey把消息路由分到不同的队列，只不过Topic类型Exchange可以让队列绑定Routingkey的时候使用通配符。

这种模型Routingkey一般都是由一个或多个单词组成，多个单词之间以"."分割

        * 匹配一个单词

# 匹配多个单词

public class Provider {
    public static void main(String[] args) throws IOException {
        Connection connection = RabbitMQUtil.getConnection();
        Channel channel = connection.createChannel();
        channel.exchangeDeclare("topics", "topic");
        String routeKey = "user.save";
        channel.basicPublish("topics",routeKey,null,"topic消息".getBytes(StandardCharsets.UTF_8));
        RabbitMQUtil.closeAll(channel,connection);
    }
}

public class Consumer1 {
    public static void main(String[] args) throws IOException {
        Connection connection = RabbitMQUtil.getConnection();
        Channel channel = connection.createChannel();
        //声明交换机和交换机类型
        channel.exchangeDeclare("topics","topic");
        String queue = channel.queueDeclare().getQueue();

        channel.queueBind(queue,"topics","user.*");
        channel.basicConsume(queue,true,new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("消费者1："+new String(body));
            }
        });
    }
}

public class Consumer2 {
    public static void main(String[] args) throws IOException {
        Connection connection = RabbitMQUtil.getConnection();
        Channel channel = connection.createChannel();
        //声明交换机和交换机类型
        channel.exchangeDeclare("topics","topic");
        String queue = channel.queueDeclare().getQueue();

        channel.queueBind(queue,"topics","#.user.#");
        channel.basicConsume(queue,true,new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("消费者2："+new String(body));
            }
        });
    }
}