HelloWorld

依赖环境

    <dependencies>
        <!--RabbitMQ 依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--RabbitMQ 测试依赖-->
        <dependency>
            <groupId>org.springframework.amqp</groupId>
            <artifactId>spring-rabbit-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--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>

代码

生产者 P

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.TimeoutException;

@Slf4j
public class Producer {
    //队列名称
    private static final String HELLO_QUEUE = "hello_queue";

    public static void main(String[] args) throws IOException, TimeoutException {
        //创建一个连接工厂
        ConnectionFactory factory = new ConnectionFactory();
        factory.setPort(5672);
        factory.setHost("localhost");
        factory.setPassword("admin");
        factory.setUsername("admin");
        //channel实现了自动close接口 自动关闭 不需要显示关闭
        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 默认消息存储在内存中
         * 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(HELLO_QUEUE,false,false,true,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 (HelloWorld里就用队列名字)
         *  3.其他的参数信息
         *  4.发送消息的消息体
         */
        channel.basicPublish("",HELLO_QUEUE,null,message.getBytes(StandardCharsets.UTF_8));
        channel.close();
        connection.close();
        log.info("发送完毕");
    }
}

消费者 C

import com.rabbitmq.client.*;
import lombok.extern.slf4j.Slf4j;
import java.nio.charset.StandardCharsets;

@Slf4j
public class Consumer {
    private static final String HELLO_QUEUE = "hello_queue";

    public static void main(String[] args) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setPort(5672);
        factory.setHost("localhost");
        factory.setPassword("admin");
        factory.setUsername("admin");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();
        //推送的消息如何进行消费的接口回调
        DeliverCallback deliverCallback = (consumerTag, message) -> {
            log.info("接收到消费的消息: {}", new String(message.getBody(), StandardCharsets.UTF_8));
        };
        //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 -> {
            log.info("消息消费被取消: {}", consumerTag);
        };

        /**
         * 消费者消费消息
         * 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
         * */
        channel.basicConsume(HELLO_QUEUE, true, deliverCallback, cancelCallback);
    }
}