Java測試RabbitMQ生產者和消費者

一、環境準備

請看上一篇文章，Ubuntu18.04安裝RabbitMQ完成RabbitMQ服務端搭建，並創建admin用戶。

gradle添加RabbitMQ客戶端依賴。

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

二、生產者創建

用戶名和密碼都爲admin，隊列名字爲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
    {
        //創建連接工廠
        ConnectionFactory factory = new ConnectionFactory();

        //設置RabbitMQ相關信息
        factory.setHost("192.168.3.45");
        factory.setVirtualHost("/");
        factory.setUsername("admin");
        factory.setPassword("admin");
        factory.setPort(5672);

        //創建一個新的連接
        Connection connection = factory.newConnection();

        //創建一個通道
        Channel channel = connection.createChannel();

        // 聲明一個隊列
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

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

        //關閉通道和連接
        channel.close();
        connection.close();
    }
}

三、消費者創建

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
    {
        // 創建連接工廠
        ConnectionFactory factory = new ConnectionFactory();

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

        //創建一個新的連接
        Connection connection = factory.newConnection();

        //創建一個通道
        Channel channel = connection.createChannel();

        //聲明要關注的隊列
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        System.out.println("Customer Waiting Received messages");

        // 告訴服務器我們需要那個頻道的消息，如果頻道中有消息，就會執行回調函數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 + "'");
            }
        };
        //自動回覆隊列應答 -- RabbitMQ中的消息確認機制
        channel.basicConsume(QUEUE_NAME, true, consumer);
    }
}

四、測試

1、啓動消費者程序，程序會阻塞，等待生成者發送消息。

2、啓動生產者程序，會發現消費者程序接收到了消息。

Customer Waiting Received messages
Customer Received 'Hello RabbitMQ'