java 语言 实现rabbitMQ 发送 对象数据，接收端处理对象数据

在 Java 语言中，您可以使用 RabbitMQ 的 Java 客户端库来发送和接收对象数据。以下是一个示例代码片段，演示如何将包含对象数据的消息发送到 RabbitMQ 中，并在接收端处理对象数据：

发送端代码：

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import java.io.IOException;
import java.io.ByteArrayOutputStream;
import java.io.ObjectOutputStream;

public class RabbitMQSender {

    private final static String QUEUE_NAME = "my_queue";

    public static void main(String[] argv) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        // Define your object
        Person person = new Person("John", "Doe", 30);

        // Convert the object to a byte array
        ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
        ObjectOutputStream objOut = new ObjectOutputStream(byteOut);
        objOut.writeObject(person);
        objOut.flush();
        byte[] messageBodyBytes = byteOut.toByteArray();

        // Publish the message to RabbitMQ
        channel.basicPublish("", QUEUE_NAME, null, messageBodyBytes);

        System.out.println(" [x] Sent object");

        channel.close();
        connection.close();
    }
}

在这个示例中，我们定义了一个名为 Person 的对象，并使用 ObjectOutputStream 将其转换为字节数组。接下来，我们将字节数组作为消息体通过 RabbitMQ 发布到一个名为 "my_queue" 的队列中。您可以根据您的需求将队列名替换为您自己的队列名。

接收端代码：

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import java.io.ByteArrayInputStream;
import java.io.ObjectInputStream;

public class RabbitMQReceiver {

    private final static String QUEUE_NAME = "my_queue";

    public static void main(String[] argv) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        System.out.println(" [*] Waiting for messages. To exit press CTRL+C");

        DefaultConsumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, 
                                       com.rabbitmq.client.AMQP.BasicProperties properties, byte[] body) throws IOException {
                ByteArrayInputStream byteIn = new ByteArrayInputStream(body);
                ObjectInputStream objIn = new ObjectInputStream(byteIn);

                try {
                    Person person = (Person) objIn.readObject();
                    System.out.println(" [x] Received " + person);
                } catch (ClassNotFoundException e) {
                    e.printStackTrace();
                }
            }
        };
        channel.basicConsume(QUEUE_NAME, true, consumer);
    }
}

在接收端，我们使用 ObjectInputStream 将字节数组转换回对象，并在控制台上打印出该对象。这样，您就可以在 RabbitMQ 中发送和接收包含对象数据的消息了。请注意，您需要在发送方和接收方都包含 Person 类的定义。