Create a Maven project

insert image description here

add dependencies

    <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>
        <dependency>
            <groupId>com.rabbitmq</groupId>
            <artifactId>amqp-client</artifactId>
            <version>5.8.0</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>
    </dependencies>

producer code

Produce a "hello world" message using a producer

/**
* 生产者：发消息
*/
public class Producer {
    
    
 //队列名称
 public static final String QUEUE_NAME = "hello";

 //发消息
 public static void main(String[] args) throws IOException, TimeoutException {
    
    
     //创建一个连接工厂
     ConnectionFactory factory = new ConnectionFactory();
     //工厂IP连接RabbitMq队列
     factory.setHost("");
     //用户名
     factory.setUsername("admin");
     //密码
     factory.setPassword("admin");
     //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（磁盘），默认情况消息存在内存中
      * 3.该队列是否只供一个消费者消费，true可以多个消费者消费；false：只能一个消费者消费
      * 4.是否自动删除，最后一个消费者断开连接以后，该队一句是否自动删除 true是，false否
      * 5.其他参数
      */
     channel.queueDeclare(QUEUE_NAME,true,false,false,null);
 	 //发消息
     String message = "hello world";
  
         /**
      * 发送一个消费
      * 1.发送到哪个交换机
      * 2.路由key值是哪个，本次是队列名称
      * 3.其他参数信息
      * 4.发送的消息
      */
     channel.basicPublish("",QUEUE_NAME,null,message.getBytes());
     System.out.println("消息发送完毕！");

 }
}

consumer code

public class Consumer {
    
    
    //队列的名称
    public static final String QUEUE_NAME = "hello";

    //接收消息
    public static void main(String[] args) throws IOException, TimeoutException {
    
    
        //创建一个连接工厂
        ConnectionFactory factory = new ConnectionFactory();
        //工厂IP连接RabbitMq队列
        factory.setHost("");
        //用户名
        factory.setUsername("admin");
        //密码
        factory.setPassword("admin");
        //创建连接
        Connection connection = factory.newConnection();
        //获取信道
        Channel channel = connection.createChannel();

        //声明,接收消息
        DeliverCallback deliverCallback = (consumerTag,message)->{
    
    
            System.out.println(new String(message.getBody()));
        };

        //取消消息的回调
        CancelCallback cancelCallback = consumerTag->{
    
    
            System.out.println("消息消费被中断");
        };

        /**
         *消费者消费信息
         * 1.消费哪个队列
         * 2.消费成功后是否自动应答，true/false
         * 3.消费者未成功消费的回调
         * 4.消费者取消消费的回调
         */
        channel.basicConsume(QUEUE_NAME,true,deliverCallback,cancelCallback);
    }
}