在Java中反序列化C#生成的RabbitMQ消息

在Java中反序列化C#生成的RabbitMQ消息涉及几个关键概念和技术点。以下是详细的解答：

基础概念

序列化与反序列化：
- 序列化是将对象转换为字节流的过程。
- 反序列化是将字节流转换回对象的过程。

RabbitMQ：
- RabbitMQ是一个开源的消息代理软件，用于在分布式系统中传递消息。
跨语言数据交换格式：
- 常用的跨语言数据交换格式包括JSON、XML和Protocol Buffers等。

类型与应用场景

JSON：易于阅读和调试，适用于大多数场景。
XML：结构化程度高，适用于复杂的数据结构。
Protocol Buffers：高效且紧凑，适用于高性能要求的场景。

具体实现步骤

假设C#端使用JSON格式序列化消息，Java端反序列化这些消息。

C#端序列化示例

using Newtonsoft.Json;
using RabbitMQ.Client;

public class Message
{
    public string Content { get; set; }
}

public void SendMessage()
{
    var factory = new ConnectionFactory() { HostName = "localhost" };
    using (var connection = factory.CreateConnection())
    using (var channel = connection.CreateModel())
    {
        var message = new Message { Content = "Hello from C#" };
        var json = JsonConvert.SerializeObject(message);

        var body = Encoding.UTF8.GetBytes(json);

        channel.BasicPublish(exchange: "", routingKey: "test_queue", basicProperties: null, body: body);
    }
}

Java端反序列化示例

import com.fasterxml.jackson.databind.ObjectMapper;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.DeliverCallback;

public class Message {
    private String content;

    // Getters and setters
    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }
}

public class RabbitMQConsumer {
    private final static String QUEUE_NAME = "test_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");

        DeliverCallback deliverCallback = (consumerTag, delivery) -> {
            String message = new String(delivery.getBody(), "UTF-8");
            ObjectMapper mapper = new ObjectMapper();
            try {
                Message receivedMessage = mapper.readValue(message, Message.class);
                System.out.println(" [x] Received '" + receivedMessage.getContent() + "'");
            } catch (Exception e) {
                e.printStackTrace();
            }
        };
        channel.basicConsume(QUEUE_NAME, true, deliverCallback, consumerTag -> { });
    }
}