RabbitMQ (一)第一个hello world

RabbitMQ是一个消息中间件，负责消息的接收和投递。它可以从生产者那里接收消息，并且投递到消费者。在这期间，它可以路由、缓存，并且可以根据你给的规则持久化消息。

 图例说明：

表示生产者 (发信人)

表示队列 (信箱)

表示消费者(收信人)

第一个“hello world” 实例的简单实现：

  

 本实例基于java的实现：

消息发送者：

 

import com.rabbitmq.client.*;
public class ClientSender {
    public static void main(String[] args) throws java.io.IOException {
        ConnectionFactory factory=new ConnectionFactory();
        factory.setHost("localhost");
        factory.setUsername("guest");
        factory.setPassword("123456");
        factory.setVirtualHost("/");
        Connection conn=factory.newConnection();
        Channel channel=conn.createChannel();
        String queueName="myqueue";
        channel.queueDeclare(queueName, false, false, false,null); 
        String message="hello world"+Math.random();
        channel.basicPublish("",queueName, null,message.getBytes());
        System.out.print("send '"+message+"'");
        channel.close();
        conn.close();

    }
}

消息接收者

 

import com.rabbitmq.client.*;
public class ClientReceiver {
    private final static String queueName="myqueue";
    public static void main(String[] args) throws java.io.IOException,java.lang.InterruptedException{
        ConnectionFactory factory=new ConnectionFactory();
        factory.setHost("localhost");
        factory.setUsername("guest");
        factory.setPassword("123456");
        Connection conn=factory.newConnection();
        Channel channel=conn.createChannel();
        channel.queueDeclare(queueName, false, false, false, null);
        System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
        QueueingConsumer consumer=new QueueingConsumer(channel);
        channel.basicConsume(queueName, true,consumer);
        while (true) {
            QueueingConsumer.Delivery delivery=consumer.nextDelivery();    
            String message=new String(delivery.getBody());
            System.out.println(" [x] Received '" + message + "'");
            Thread.sleep(100);
        }
    }
}