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生产者连接rabbitMQ的代码：

import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.MessageProperties;

public class RabbitProducer {
  private static final String EXCHANGE_NAME = "exchange_demo";
  private static final String ROUTING_KEY = "routingkey_demo";
  private static final String QUEUE_NAME = "queue_demo";
  private static final String IP_ADDRESS = "127.0.0.1";
  private static final int PORT = 5672;  // RabbitMQ服务端默认端口号为5672
  
  public static void main(String[] args) throws IOException, TimeoutException {
    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost(IP_ADDRESS);
    factory.setPort(PORT);
    factory.setUsername("zifeiy");
    factory.setPassword("passwd");
    Connection connection = factory.newConnection();  // 建立连接
    Channel channel = connection.createChannel();    // 创建信道
    // 创建一个type="direct"、持久化的、非自动删除的交换器
    channel.exchangeDeclare(EXCHANGE_NAME, "direct", true, false, null);
    // 创建一个持久化、非排他的、非自动删除的队列
    channel.queueDeclare(QUEUE_NAME, true, false, false, null);
    // 将交换器和队列通过路由绑定
    channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, ROUTING_KEY);
    // 发送一条持久化的消息：hello world!
    String message = "hello,world!";
    channel.basicPublish(EXCHANGE_NAME, ROUTING_KEY, 
          MessageProperties.PERSISTENT_TEXT_PLAIN, 
          message.getBytes());
    // 关闭资源
    channel.close();
    connection.close();
  }
}

消费者连接rabbitMQ的代码：

import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Address;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Consumer;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.Connection;

public class RabbitConsumer {
  private static final String QUEUE_NAME = "queue_demo";
  private static final String IP_ADDRESS = "127.0.0.1";
  private static final int PORT = 5672;
  
  public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
    Address[] addresses = new Address[] {
        new Address(IP_ADDRESS, PORT)
    };
    ConnectionFactory factory = new ConnectionFactory();
    factory.setUsername("zifeiy");
    factory.setPassword("passwd");
    // 这里的连接方式与生产者的demo略有不同，注意区分
    Connection connection = factory.newConnection(addresses);  // 创建连接
    final Channel channel = connection.createChannel();  // 创建信道
    channel.basicQos(64);   // 设置客户端最多接受未被ack的消息的个数
    Consumer consumer = new DefaultConsumer(channel) {
      @Override
      public void handleDelivery(String consumerTag, Envelope envelope, 
              AMQP.BasicProperties properties, byte[] body) throws IOException {
        System.out.println("recv message: " + new String(body));
        try {
          TimeUnit.SECONDS.sleep(1);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
        channel.basicAck(envelope.getDeliveryTag(), false);
      }
    };
    channel.basicConsume(QUEUE_NAME, consumer);
    // 等待回调函数执行完毕后，关闭资源
    TimeUnit.SECONDS.sleep(5);
    channel.close();
    connection.close();
  }
}