我有一个监听本地主机端口的应用程序.我想要一个最小的启动器来将该应用程序放在最前面.

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.我不知道怎么写任何exe文件，但是我可以写bat文件，然后做一个快捷方式来启动bat文件而不显示终端.我想让 bat 文件向端口发送一些数据(最好是 UDP，这样不会有任何流开销).

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).

如何将数据发送到 UDP 端口?

How can I send data to a UDP port?

我想到的一件事是 nslookup，但据我所知，它只会连接到端口 53.

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.希望它可以在 XP 及更高版本上运行，但如有必要，我可以制定解决方法.

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://nc110.sourceforge.net/

安装后，您可以轻松地从命令行启动它或编写一个 BAT 脚本来为您执行它.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，要将数据发送到本地主机上的 UPD 端口 2345，请执行:

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.