RabbitMQ生产者和消费者实战

喜欢ヅ旅行 2021-07-24 13:18 472阅读 0赞

**一 在RabbitMQ中新建用户**

用户名：root

密码：123456

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

**二 生产者客户端代码**

package com.rabbitmq.simple;
    
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.Connection;
    import com.rabbitmq.client.ConnectionFactory;
    import com.rabbitmq.client.MessageProperties;
    import com.rabbitmq.util.ConnectionUtils;
    import java.io.IOException;
    import java.util.concurrent.TimeoutException;
    
    /**
    * 生产者
    */
    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（AMQP） 服务端默认端口号为 5672
    
        public static void main(String[] args) throws IOException,
                TimeoutException, InterruptedException {
    
    
            ConnectionFactory factory = new ConnectionFactory();
            factory.setHost(IP_ADDRESS);
            factory.setUsername("root");
            factory.setPassword("123456");
            Connection connection = factory.newConnection();
            Channel channel = connection.createChannel();
            // 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 !";
            // 消息发布
            channel.basicPublish(EXCHANGE_NAME, ROUTING_KEY,
                    MessageProperties.PERSISTENT_TEXT_PLAIN,
                    message.getBytes());
            //关闭资源
            ConnectionUtils.close(channel, connection);
        }
    }

**三 运行生产者代码RabbitMQ管理界面如下**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 2][]

**四 消费者代码**

package com.rabbitmq.simple;
    
    import com.rabbitmq.client.*;
    import com.rabbitmq.util.ConnectionUtils;
    import java.io.IOException;
    import java.util.concurrent.TimeUnit;
    import java.util.concurrent.TimeoutException;
    
    /**
    * 消费者
    */
    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("root");
            factory.setPassword("123456");
            Connection connection = factory.newConnection(addresses);
            final Channel channel = connection.createChannel();
            // 设置客户端最多未被ack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.printStackTrace();
                    }
                    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);
            ConnectionUtils.close(channel, connection);
        }
    }

**五 运行消费者代码，控制台输出如下**

recv message: Hello World !
    
    Process finished with exit code 0

**六 参考代码位置：**

[https://github.com/cakin24/RabbitMQDemo/tree/master/src/main/java/com/rabbitmq/simple][https_github.com_cakin24_RabbitMQDemo_tree_master_src_main_java_com_rabbitmq_simple]

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[https_github.com_cakin24_RabbitMQDemo_tree_master_src_main_java_com_rabbitmq_simple]: https://github.com/cakin24/RabbitMQDemo/tree/master/src/main/java/com/rabbitmq/simple