ｊａｖａ rabbitmq 队列代码

以下是使用Java编写的RabbitMQ队列代码示例：

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class RabbitMQExample {
    private final static String QUEUE_NAME = "my_queue";

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

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        String message = "Hello World!";
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes("UTF-8"));
        System.out.println(" [x] Sent '" + message + "'");

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

这段代码创建了一个连接到RabbitMQ服务器的`Connection`对象和一个`Channel`对象。然后它使用`channel.queueDeclare()`方法声明一个队列。接下来，它将一个消息发送到队列中，使用`channel.basicPublish()`方法。最后，它关闭了`Channel`对象和`Connection`对象。