RabbitMQ快速入门

快速入门-消息生产与消费（即生产者把消息放到消息队列，然后消费者直接去消息队列取消息进行消费）

ConnectionFactory：获取连接工厂

Connection：一个链接

Channel：数据通信通道，课发送和接收消息

Queue：具体的消息存储队列

Producer & Consumer：生产和消费者

导入所需pom依赖：

<dependency>
    <groupId>com.rabbitmq</groupId>
    <artifactId>amqp-client</artifactId>
    <version>3.6.5</version>
</dependency>

消费端代码：

package com.ue.quickstart;

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

/**
 * 消费端
 * @Author LiJun
 * @Date 2020/02/14
 * @Time 18:46
 */
public class Consumer {
    public static void main(String[] args) throws Exception {

        //1、创建一个ConnectionFactory, 并进行配置
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.14.758");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");

        //2、通过连接工厂创建连接
        Connection connection = connectionFactory.newConnection();

        //3、通过connection创建一个Channel
        Channel channel = connection.createChannel();

        //4、声明（创建）一个队列
        String queueName = "test001";
        //参数：队列名称、持久化与否、独占与否、无消息队列是否自动删除、消息参数
        //queueDeclare(String queue, boolean durable, boolean exclusive, boolean autoDelete, Map<String, Object> arguments)
        channel.queueDeclare(queueName, true, false, false, null);

        //5、创建消费者
        QueueingConsumer queueingConsumer = new QueueingConsumer(channel);

        //6、设置Channel
        //参数：队列名称、自动签收、消费者回调
        //basicConsume(String queue, boolean autoAck, Consumer callback)
        channel.basicConsume(queueName, true, queueingConsumer);

        while(true){
            //7、获取消息（Delivery：传送）
            QueueingConsumer.Delivery delivery = queueingConsumer.nextDelivery();
            String msg = new String(delivery.getBody());
            System.err.println("消费端: " + msg);
            //Envelope envelope = delivery.getEnvelope();
        }
    }
}

生产端代码：

package com.ue.quickstart;

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

/**
 * 生产端
 * @Author LiJun
 * @Date 2020/02/14
 * @Time 18:49
 */
public class Procuder {
    public static void main(String[] args) throws Exception {
        //1、创建一个ConnectionFactory, 并进行配置
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.14.758");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");

        //2、通过连接工厂创建连接
        Connection connection = connectionFactory.newConnection();

        //3、通过connection创建一个Channel
        Channel channel = connection.createChannel();

        //4、通过Channel发送数据
        for(int i=0; i < 5; i++){
            String msg = "Hello RabbitMQ!";
            //1、exchange   2、routingKey
            channel.basicPublish("", "test001", null, msg.getBytes());
        }

        //5、记得要关闭相关的连接
        channel.close();
        connection.close();
    }
}

注意先运行消费者，再运行生产者

打印结果如下：

本例中并没有指定交换机，所以会使用RabbitMQ默认的交换机