（java）简单实现原生RabbitMQ中的广播订阅（fanout）模式

fanout 发送端

import com.rabbitmq.client.Channel;import com.rabbitmq.client.Connection;import com.rabbitmq.client.ConnectionFactory;public class MyFanoutSender {       private static final String MESSAGE = "my name is";        public static void main(String[] args){    Connection conn = null;    Channel channel = null;    try {    //初始化连接，主机，端口，用户名，密码可以自己定义ConnectionFactory factory = new ConnectionFactory();factory.setHost(HOST_PARAMETER.LOCAL_HOST);factory.setPort(HOST_PARAMETER.LOCAL_PORT);factory.setUsername(HOST_PARAMETER.LOCAL_USER_NAME);factory.setPassword(HOST_PARAMETER.LOCAL_PASSWORD);//创建连接conn = factory.newConnection();//创建通道channel = conn.createChannel();//定义为fanout类型的交换机channel.exchangeDeclare(HOST_PARAMETER.EXCHANGE_NAME, "fanout");//发送，指定routingkey为""channel.basicPublish(HOST_PARAMETER.EXCHANGE_NAME, "", null, MESSAGE.getBytes());System.out.println("I send a fanout massage!");} catch (Exception e) {e.printStackTrace();} finally{try {if(channel != null){channel.close();}if(conn != null){conn.close();}} catch (Exception e) {e.printStackTrace();}}    }}

fanout订阅者（接收端），可以自己多定义几个，才能看出效果

import java.io.IOException;import com.rabbitmq.client.AMQP.BasicProperties;import com.rabbitmq.client.Channel;import com.rabbitmq.client.Connection;import com.rabbitmq.client.ConnectionFactory;import com.rabbitmq.client.Consumer;import com.rabbitmq.client.DefaultConsumer;import com.rabbitmq.client.Envelope;public class MyFirstFanoutReceiver {  public static void main(String[] args){  Connection conn = null;    Channel channel = null;    try {  //初始化连接ConnectionFactory factory = new ConnectionFactory();factory.setHost(HOST_PARAMETER.LOCAL_HOST);factory.setPort(HOST_PARAMETER.LOCAL_PORT);factory.setUsername(HOST_PARAMETER.LOCAL_USER_NAME);factory.setPassword(HOST_PARAMETER.LOCAL_PASSWORD);//创建连接conn = factory.newConnection();//创建通道channel = conn.createChannel();//声明交换机类型channel.exchangeDeclare(HOST_PARAMETER.EXCHANGE_NAME, "fanout");//声明默认的队列String queue = channel.queueDeclare().getQueue();//将队列与交换机绑定，最后一个参数为routingKey,与发送者指定的一样""channel.queueBind(queue, HOST_PARAMETER.EXCHANGE_NAME, "");//消费者    Consumer consumer = new DefaultConsumer(channel){@Overridepublic void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)throws IOException {System.out.println(new String(body,"utf-8")+" Tom");}        };    channel.basicConsume(queue, true, consumer);    System.out.println("i am the first fanout receiver!");      }catch (Exception e) {e.printStackTrace();  }   }}