RabbitMQ 基础教程 Hello World

来源：互联网发布：2016淘宝818活动编辑：程序博客网时间：2024/05/22 15:37

本节我们将参照官网给出的Hello World示例，构建一个发送接收消息的入门小程序

1 . 创建一个simple的Maven工程在pom.xml中添加

<dependencies>    <dependency>        <groupId>com.rabbitmq</groupId>        <artifactId>amqp-client</artifactId>        <version>4.1.0</version>    </dependency></dependencies>

2 . 创建producer 消息生产者 Send.java

import com.rabbitmq.client.Channel;import com.rabbitmq.client.Connection;import com.rabbitmq.client.ConnectionFactory;public class Send {    //设置消息队列的名称    private final static String QUEUE_NAME="hello";    public static void main(String[] args) throws Exception {        //创建到服务器的连接        ConnectionFactory factory = new ConnectionFactory();        //如果你想连接非本地主机的RabbitMQ服务器broker 直接修改host为相应的IP地址        factory.setHost("localhost");        Connection connection = factory.newConnection();        //大部分的工作是在channel下完成的        Channel channel = connection.createChannel();        //为了将我们的消息发送到broker上的队列，必须先创建一个队列，只有在当前队列不存在时才会新建队列        channel.queueDeclare(QUEUE_NAME, false, false, false, null);        String message ="Hello world";        //消息必须是以字节数组的形式发送，你可以采用相应的编码方式        channel.basicPublish("", QUEUE_NAME, null, message.getBytes("UTF-8"));        System.out.println(" [x] Sent '"+ message+"'");        //关闭资源        channel.close();        connection.close();    }}

3 . 创建消费者consumer Recv.java

import java.io.IOException;import java.util.concurrent.TimeoutException;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 Recv {    private final static String QUEUE_NAME = "hello";    public static void main(String[] args) throws Exception, TimeoutException {        //创建连接        ConnectionFactory factory = new ConnectionFactory();        factory.setHost("localhost");        Connection connection = factory.newConnection();        Channel channel = connection.createChannel();        //绑定到我们需要消费消息的队列，并且可以在先启动消费者的情况下确保队列存在        channel.queueDeclare(QUEUE_NAME, false, false, false, null);        System.out.println(" [*] Waiting for messages . To exit press CTRL+C");        //缓存消息，直到我们准备好去消费他        Consumer consumer = new DefaultConsumer(channel) {            @Override            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)                    throws IOException {                String message =new String(body,"UTF-8");                System.out.println(" [x] Received '"+message+" '");            }        };        channel.basicConsume(QUEUE_NAME, true,consumer);    }}

4 . 运行RabbitMQ服务，运行Send.java ,Recv.java查看结果
5 . 可以用户以下命令查看broker中有多少队列或有多少消息

\RabbitMQ Server\rabbitmq_server-3.6.9\sbin> rabbitmqctl.bat list_queues

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