发布/订阅模式

        消息发送端发送消息到交换机，交换机并不存储消息，只是转发消息给队列，当交换机的类型是fanout类型时，消息会被转发到所有与交换机绑定的队列中。

package com.tech.rabbitmq.nospring.pub;

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

import java.nio.charset.StandardCharsets;


public class Send {

    private final static String EXCHANGE_NAME = "exchange_fanout";

    public static void main(String[] argv) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("192.168.50.134");
        factory.setPort(5672);
        factory.setVirtualHost("/dev");
        factory.setUsername("tech");
        factory.setPassword("tech");
        try (Connection connection = factory.newConnection();
             Channel channel = connection.createChannel()) {
            //绑定交换机
            channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.FANOUT);
            String msg = "fanout交换机测试";
            channel.basicPublish(EXCHANGE_NAME, "", null, msg.getBytes(StandardCharsets.UTF_8));
            System.out.println("广播消息发送成功");
        }
    }
}

package com.tech.rabbitmq.nospring.pub;

import com.rabbitmq.client.*;

import java.io.IOException;
import java.util.concurrent.TimeUnit;


public class Recv1 {
    private final static String EXCHANGE_NAME = "exchange_fanout";

    public static void main(String[] argv) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("192.168.50.134");
        factory.setPort(5672);
        factory.setVirtualHost("/dev");
        factory.setUsername("tech");
        factory.setPassword("tech");

        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        //绑定交换机
        channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.FANOUT);

        String queueName = channel.queueDeclare().getQueue();
        //绑定交换机和队列，fanout交换机不需要routingkey
        channel.queueBind(queueName, EXCHANGE_NAME, "");

        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("body=" + new String(body, "utf-8"));
                //手动确认消息，不是多条确认
                channel.basicAck(envelope.getDeliveryTag(), false);
            }
        };
        //false 关闭自动确认
        channel.basicConsume(queueName, false, consumer);
    }
}

package com.tech.rabbitmq.nospring.pub;

import com.rabbitmq.client.*;

import java.io.IOException;


public class Recv2 {
    private final static String EXCHANGE_NAME = "exchange_fanout";

    public static void main(String[] argv) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("192.168.50.134");
        factory.setPort(5672);
        factory.setVirtualHost("/dev");
        factory.setUsername("tech");
        factory.setPassword("tech");

        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        //绑定交换机
        channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.FANOUT);

        String queueName = channel.queueDeclare().getQueue();
        //绑定交换机和队列，fanout交换机不需要routingkey
        channel.queueBind(queueName, EXCHANGE_NAME, "");

        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("body=" + new String(body, "utf-8"));
                //手动确认消息，不是多条确认
                channel.basicAck(envelope.getDeliveryTag(), false);
            }
        };
        //false 关闭自动确认
        channel.basicConsume(queueName, false, consumer);
    }
}

所有的接收端都能收到消息。