java - 建立套接字连接时出错

Question

我正在尝试运行下面的程序，但出现此错误:

Exception in thread "main" java.net.ConnectException: Connection refused: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:529)
    at com.rabbitmq.client.ConnectionFactory.createFrameHandler(ConnectionFactory.java:445)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:504)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:533)
    at Recieve.main(Recieve.java:14)

我要运行的程序是:

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

public class Send {
    private final static String QUEUE_NAME = "hello";

    public static void main(String[] argv) throws java.io.IOException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        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());
        System.out.println(" [x] Sent '" + message + "'");
        channel.close();
        connection.close();
    }
}

我不知道建立套接字连接，请告诉我如何解决这个问题。

Answer 1

为了让您的代码正常工作，您应该遵循以下步骤:

1. 下载并安装最新的 Erlang。
2. 下载 RabbitMQ 服务器。
3. 安装 RabbitMQ 服务器
4. 编译并运行您的代码，现在它应该可以工作了。

希望这对您有所帮助。