1. pom.xml

<!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client -->
<dependency>
    <groupId>com.rabbitmq</groupId>
    <artifactId>amqp-client</artifactId>
    <version>4.1.0</version>
</dependency>

2 . 接收端

package com.niewj.service;

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

import java.util.concurrent.TimeoutException;

public class Recv {
    //隊列名稱
    private final static String QUEUE_NAME = "hello";

    public static void main(String[] argv) throws java.io.IOException,  java.lang.InterruptedException, TimeoutException {
        //打開連接和創(chuàng)建頻道，與發(fā)送端一樣
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        factory.setPort(5672);
        factory.setUsername("admin");
        factory.setPassword("123456");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();
        //聲明隊列，主要為了防止消息接收者先運行此程序，隊列還不存在時創(chuàng)建隊列。
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        System.out.println(" [*] Waiting for messages. To exit press CTRL+C");

//        //創(chuàng)建隊列消費者
//        DefaultConsumer consumer = new DefaultConsumer(channel);
//        //指定消費隊列
//        channel.basicConsume(QUEUE_NAME, true, consumer);
//        while (true) {
//            //nextDelivery是一個阻塞方法（內(nèi)部實現(xiàn)其實是阻塞隊列的take方法）
//            DefaultConsumer.Delivery delivery = consumer.nextDelivery();
//            String message = new String(delivery.getBody());
//            System.out.println(" [x] Received '" + message + "'");
//        }

        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(" [x] 接收消息 '" + message + "'");
            }
        };
        channel.basicConsume(QUEUE_NAME, true, consumer);

    }
}

3. 發(fā)送端

package com.niewj.service;

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

import java.util.concurrent.TimeoutException;

public class Send {
    //隊列名稱
    private final static String QUEUE_NAME = "hello";

    public static void main(String[] argv) throws java.io.IOException, TimeoutException {
        //創(chuàng)建連接連接到MabbitMQ
        ConnectionFactory factory = new ConnectionFactory();
        //設(shè)置MabbitMQ所在主機ip或者主機名
        factory.setHost("localhost");
        factory.setPort(5672);
        factory.setUsername("admin");
        factory.setPassword("123456");
        //創(chuàng)建一個連接
        Connection connection = factory.newConnection();
        //創(chuàng)建一個頻道
        Channel channel = connection.createChannel();
        //指定一個隊列
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        //發(fā)送的消息
        String message = "{\"name\": \"nie\" }, \"online\": false}";
        //往隊列中發(fā)出一條消息
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
        System.out.println(" [x] 發(fā)送 '" + message + "'");
        //關(guān)閉頻道和連接
        channel.close();
        connection.close();
    }
}

啟動接受端, 然后使用發(fā)送端發(fā)消息，便可以接收到。