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

场景

上午在启动程序时，发现 端口被占用，启动失败了

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APPLICATION FAILED TO START
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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.

解决方案

1、打开 命令行工具

2、使用 netstat -aon|findstr port 查看占用信息

C:\Users\Administrator>netstat -aon|findstr 8080
  TCP    0.0.0.0:8080           0.0.0.0:0              LISTENING       20364
  TCP    [::]:8080              [::]:0                 LISTENING       20364

3、kill 掉即可

C:\Users\Administrator>taskkill -PID 20364 -F
成功: 已终止 PID 为 20364 的进程。

 至此占用端口已经释放。