Java测试RabbitMQ生产者和消费者

一、环境准备

请看上一篇文章，Ubuntu18.04安装RabbitMQ完成RabbitMQ服务端搭建，并创建admin用户。

gradle添加RabbitMQ客户端依赖。

compile group: 'com.rabbitmq', name: 'amqp-client', version: '3.6.5'

二、生产者创建

用户名和密码都为admin，队列名字为test

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

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

/**
 * Created by wzj on 2018/6/10.
 */
public class Producer
{
    public final static String QUEUE_NAME = "test";

    public static void main(String[] args) throws IOException, TimeoutException
    {
        //创建连接工厂
        ConnectionFactory factory = new ConnectionFactory();

        //设置RabbitMQ相关信息
        factory.setHost("192.168.3.45");
        factory.setVirtualHost("/");
        factory.setUsername("admin");
        factory.setPassword("admin");
        factory.setPort(5672);

        //创建一个新的连接
        Connection connection = factory.newConnection();

        //创建一个通道
        Channel channel = connection.createChannel();

        // 声明一个队列
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //发送消息到队列中
        String message = "Hello RabbitMQ";
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes("UTF-8"));
        System.out.println("Producer Send +'" + message + "'");

        //关闭通道和连接
        channel.close();
        connection.close();
    }
}

三、消费者创建

import com.rabbitmq.client.*;

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

/**
 * Created by wzj on 2018/6/10.
 */
public class Customer
{
    private final static String QUEUE_NAME = "test";

    public static void main(String[] args) throws IOException, TimeoutException
    {
        // 创建连接工厂
        ConnectionFactory factory = new ConnectionFactory();

        //设置RabbitMQ地址
        factory.setHost("192.168.3.45");
        factory.setVirtualHost("/");
        factory.setUsername("admin");
        factory.setPassword("admin");

        //创建一个新的连接
        Connection connection = factory.newConnection();

        //创建一个通道
        Channel channel = connection.createChannel();

        //声明要关注的队列
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        System.out.println("Customer Waiting Received messages");

        // 告诉服务器我们需要那个频道的消息，如果频道中有消息，就会执行回调函数handleDelivery
        Consumer consumer = new DefaultConsumer(channel)
        {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException
            {
                String message = new String(body, "UTF-8");
                System.out.println("Customer Received '" + message + "'");
            }
        };
        //自动回复队列应答 -- RabbitMQ中的消息确认机制
        channel.basicConsume(QUEUE_NAME, true, consumer);
    }
}

四、测试

1、启动消费者程序，程序会阻塞，等待生成者发送消息。

2、启动生产者程序，会发现消费者程序接收到了消息。

Customer Waiting Received messages
Customer Received 'Hello RabbitMQ'