【日期】：2020/4/7
【問題】：續上次修改端口后（Idea運行Spring項目報錯 “Web server failed to start. Port 8080 was already in use.”（一）），重啟后，又發現新的錯誤。
APPLICATION FAILED TO START
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.
Process finished with exit code 0
新的錯誤
【原因】：tomcat 9.0服務自動啟動
【如何發現】：偶然發現，理性分析
【如何修復】：關閉tomcat服務自動啟動就好了. （如何關閉（啟動）自動啟動的tomcat進程）
