RabbitMQ 简单示例

• 需要引入的 maven 的jar包

<!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client -->
<dependency>
    <groupId>com.rabbitmq</groupId>
    <artifactId>amqp-client</artifactId>
    <version>5.14.0</version>
</dependency>

1、生产者客户端代码

package com.zzh.rabbitmq.demo;

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

public class RabbitProducer {
    private static final String EXCHANGE_NAME = "exchange_demo";
    private static final String ROUTING_KEY = "rounting_key";
    private static final String QUEUE_NAME = "queue_demo";
    private static final String IP_ADDRESS = "192.168.0.1";
    private static final int PORT = 5672; // RabbitMq服务器端默认端口号为5672

    public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost(IP_ADDRESS);
        factory.setPort(PORT);
        factory.setUsername("root");
        factory.setPassword("root123");
        // 创建连接
        Connection connection = factory.newConnection();
        // 创建信道
        Channel channel = connection.createChannel();
        // 创建一个 type="direct" 持久的，非自动删除的交换机器
        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);
        // 将交换器与队列通过路由键绑定
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, ROUTING_KEY);
        // 发送一条持久化的消息：hello world;
        String message = "Hello world!";
        cahnnel.basicPublish(EXCHANGE_NAME, ROUTING_KEY, MessageProperties.PERSISTENT_TEXT_PLAIN,message.getBytes());

        // 关闭资源
        channel.close();
        connection.close();
    }
}

2、消费者客户端代码

package com.rabbitmq.demo;

import com.rabbitmq.client.*;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeException;

public class RabbitConsumer {
    private static final String QUEUE_NAME = "queue_demo";
    private static final String IP_ADDRESS = "192.168.0.1";
    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("root");
        factory.setPassword("root123");
        // 创建连接（这里的连接方式与生产者的demo略有不同，注意辨别区别）
        Connection connection = factory.newConnection(addresses); 
        // 创建信道
        final Channel channel = connection.createChannel();
        // 设置客户端最多接收未被 ack 的消息的个数
        channel.basicQos(64);
        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.printStackTreace();
                }
                channel.basicAck(envelope.getDeliveryTag(), false);
            }
        };
        channel.basicConsume(QUEUE_NAME, consumer);
        // 等待回调函数执行完毕之后，关闭资源
        TimeUnit.SECONDS.sleep(5);
        channel.close();
        connection.close();
    }
}