通过Java套接字监听端口 [英] Listen to port via a Java socket

问题描述

我的客户端与之通信的服务器软件会定期在端口4000上发送事务消息.我需要将这些消息逐行打印到控制台.(最终，我将不得不将这些值写入表中，但我将其保存以备后用.)

A server software my client communicates with regularly sends transaction messages on port 4000. I need to print those messages to the console line by line. (Eventually I will have to write those values to a table, but I’m saving that for later.)

我尝试了此代码，但未输出任何内容:

I tried this code but it doesn’t output anything:

package merchanttransaction;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.ClassNotFoundException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class MerchantTransaction {
    public static void main(String[] args) {
        try {
            InetAddress host = InetAddress.getLocalHost();
            Socket socket = new Socket("192.168.1.104", 4000);
            ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
            String message = (String) ois.readObject();
            System.out.println("Message: " + message);

            ois.close();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

顺便说一句，我需要能够监视该端口，直到程序终止.我不确定上面的代码是否能够做到这一点，因为我看不到代码的任何迭代.

By the way, I need to be able to monitor that port until the program terminates. I’m not sure if the code above will be able to do that because I don’t see any iteration to the code.

我正在使用在Ubuntu上运行的Java版本1.6.0_24，SE运行时环境(内部版本1.6.0_24-b07).

I’m using Java version 1.6.0_24, SE Runtime Environment (build 1.6.0_24-b07) running on Ubuntu.

推荐答案

您需要使用 ServerSocket .您可以在此处找到说明.

You need to use a ServerSocket. You can find an explanation here.

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