RabbitMQ使用--Publish/Subscribe(订阅模式类型)

在订阅模式中多了一个Exchange角色。
Exchange通常有三种类型：
Fanout(广播),使用该模式，Exchange会将消息发布到所绑定的所有队列中。
Direct(定向),把消息交给符合指定routing key 的队列。
Topic(通配符)，把消息交给符合routing pattern（路由模式） 的队列。
product代码：

public class Producer {
    
    
    public static void main(String[] args) throws Exception{
    
    
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("139.196.37.163");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        connectionFactory.setVirtualHost("my_vhost");
        //创建连接
        Connection connection = connectionFactory.newConnection();
        //创建频道
        Channel channel = connection.createChannel();
        //创建队列
        /**
         * String queue,
         * boolean durable,
         * boolean exclusive,
         * boolean autoDelete,
         * Map<String, Object
         */
        channel.queueDeclare("ps_queues1",true,false,false,null);
        channel.queueDeclare("ps_queues2",true,false,false,null);
        //创建交换机
        /**
         * String exchange,  交换机名
         * BuiltinExchangeType type, 交换机类型
         * boolean durable, 是否持久化储存
         * boolean autoDelete, 是否自动删除
         * boolean internal,内部使用。 一般false
         * Map<String, Object 参数
         */
        String exchangeName = "test_fanout";
        channel.exchangeDeclare(exchangeName, BuiltinExchangeType.FANOUT,true,false,false,null);
        //7. 绑定队列和交换机
        /**
         * String queue,
         * String exchange,
         * String routingKey
         */
        channel.queueBind("ps_queues1",exchangeName,null);
        channel.queueBind("ps_queues2",exchangeName,null);
        //发送消息
        channel.basicPublish("amq.fanout","",null,"小逼崽子".getBytes());
        channel.close();
        connection.close();
    }
}

Consumer代码：

public class Consumer1 {
    
    
    public static void main(String[] args) throws Exception{
    
    

    ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("139.196.37.163");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        connectionFactory.setVirtualHost("my_vhost");
    //创建连接
    Connection connection = connectionFactory.newConnection();
    //创建频道
    Channel channel = connection.createChannel();
    //创建队列，如果有就不会创建
    /**
     * String queue,
     * boolean durable,
     * boolean exclusive,
     * boolean autoDelete,
     * Map<String, Object> arguments
     */
        channel.queueDeclare("ps_queues1", true, false, false, null);
    /**
     * String queue,
     * boolean autoAck,
     * Map<String, Object> arguments,
     * Consumer callback
     */
    DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
    
    
        public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
    
    

            System.out.println(new String(body));
        }
    };
        channel.basicConsume("ps_queues1", true, defaultConsumer);

}
}