Windows BAT或CMD：将一些数据发送到localhost udp端口 [英] Windows BAT or CMD: send some data to a localhost udp port

问题描述

我有一个应用程序监听本地端口。我想要一个最小的启动器把这个应用程序带到前面。

I have an app that listens on a localhost port. I want a minimal launcher to bring that app's to the front.

我的应用程序是Java。我不知道如何写任何exe文件，但我可以写bat文件，然后制作一个快捷方式启动bat文件，而不显示终端。我想让bat文件发送一些数据到一个端口（最好是UDP，所以不会有任何流开销）。

My app is in Java. I don't know how to write any exe files, but I can write bat files, and then make a shortcut that launches the bat file without showing the terminal. I would like to have the bat file send some data to a port (preferably UDP so there will not be any stream overhead).

如何发送数据到UDP端口？

How can I send data to a UDP port?

我想到的一件事是 nslookup ，但是只能连接到端口53我知道。

One of the things I thought of was nslookup, but that will only connect to port 53 as far as I know.

这只需要在Windows上工作。

This only needs to work on Windows. Would like it to work on XP and up, but I can make a workaround if necessary.

推荐答案

这是netcat的工作。

This is a job for netcat.

http://www.securityfocus.com/tools/139

安装后，您可以从命令行轻松启动它，或者编写BAT脚本为您执行。
要通过UDP而不是TCP发送日期，请使用-u开关。

After installing you can easily launch it from the command line or write a BAT script to execute it for you. To send date through UDP rather than TCP, use the "-u" switch.

例如，要将数据发送到UPD端口2345 ：

For example, to send the data to UPD port 2345 on localhost execute:

nc -u localhost 2345

然后输入您要发送的数据。

Then type the data you want to send.

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