无法打开web server

[Jenn-web]

Description:

Web server failed to start. Port 8080 was already in use.

Action:

Identify and stop the process that's listening on port 8080 or configure this application to listen on another port.
之前没接触过java，还望大佬们不吝赐教，从releases下载的包如何使用，谢谢。