【RabbitMQ教程】第二章 —— RabbitMQ - 简单案例（上）

<!--指定 jdk 编译版本-->
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>8</source>
                <target>8</target>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <!--rabbitmq 依赖客户端-->
    <dependency>
        <groupId>com.rabbitmq</groupId>
        <artifactId>amqp-client</artifactId>
        <version>5.8.0</version>
    </dependency>
    <!--操作文件流的一个依赖-->
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.6</version>
    </dependency>
</dependencies>

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
public class Producer {
    private final static String QUEUE_NAME = "hello";
    public static void main(String[] args) throws Exception {
        //创建一个连接工厂
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        factory.setUsername("admin");
        factory.setPassword("123456");
        //channel 实现了自动 close 接口 自动关闭 不需要显示关闭
        //创建连接
        Connection connection = factory.newConnection();
        //获取信道
        Channel channel = connection.createChannel();
        /**
         * 生成一个队列
         * 1.队列名称
         * 2.队列里面的消息是否持久化 也就是是否用完就删除
         * 3.该队列是否只供一个消费者进行消费 是否进行共享 true 可以多个消费者消费
         * 4.是否自动删除 最后一个消费者端开连接以后 该队列是否自动删除 true 自动删除
         * 5.其他参数
         */
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        String message = "hello world";
        /**
         * 发送一个消息
         * 1.发送到那个交换机
         * 2.路由的 key 是哪个
         * 3.其他的参数信息
         * 4.发送消息的消息体
         */
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
        System.out.println("消息发送完毕");
    }
}

import com.rabbitmq.client.*;
public class Consumer {
    private final static String QUEUE_NAME = "hello";
    public static void main(String[] args) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        factory.setUsername("admin");
        factory.setPassword("123456");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();
        System.out.println("等待接收消息.........");
        //推送的消息如何进行消费的接口回调
        DeliverCallback deliverCallback = (consumerTag, delivery) -> {
            String message = new String(delivery.getBody());
            System.out.println(message);
        };
        //取消消费的一个回调接口 如在消费的时候队列被删除掉了
        CancelCallback cancelCallback = (consumerTag) -> {
            System.out.println("消息消费被中断");
        };
        /**
         * 消费者消费消息 - 接受消息
         * 1.消费哪个队列
         * 2.消费成功之后是否要自动应答 true 代表自动应答 false 手动应答
         * 3.消费者未成功消费的回调
         * 4.消息被取消时的回调
         */
        channel.basicConsume(QUEUE_NAME, true, deliverCallback, cancelCallback);
    }
}

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
public class RabbitMqUtils {
    //得到一个连接的 channel
    public static Channel getChannel() throws Exception {
        //创建一个连接工厂
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        factory.setUsername("admin");
        factory.setPassword("123456");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();
        return channel;
    }
}

import com.oddfar.utils.RabbitMqUtils;
import com.rabbitmq.client.CancelCallback;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
/**
 * 这是一个工作线程，相当于之前的消费者
 */
public class Worker01 {
    private static final String QUEUE_NAME = "hello";
    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMqUtils.getChannel();
        //消息接受
        DeliverCallback deliverCallback = (consumerTag, delivery) -> {
            String receivedMessage = new String(delivery.getBody());
            System.out.println("接收到消息:" + receivedMessage);
        };
        //消息被取消
        CancelCallback cancelCallback = (consumerTag) -> {
            System.out.println(consumerTag + "消费者取消消费接口回调逻辑");
        };
        System.out.println("C1 消费者启动等待消费.................. ");
        channel.basicConsume(QUEUE_NAME, true, deliverCallback, cancelCallback);
    }
}

public class Task01 {
    public static final String QUEUE_NAME = "hello";
    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMqUtils.getChannel();
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            String message = scanner.next();
            channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
            System.out.println("消息发送完成：" + message);
        }
    }
}