我照著youtube上的教學安裝了eclipse和tomcat V9.0 確定在瀏覽器上打127.0.0.1:8081會顯示: "If you're seeing this, you've successfully installed Tomcat. Congratulations!" 可是不管我怎麼設定,eclipse JEE 就是沒辦法跑server, 會出現錯誤訊息: "Starting Tomcat V9.0 Server at local host has encountered a problem." "This server cannot be started because one or more of the ports are invalid. Open the server editor and correct the invalid ports." 請問這該如何解決呢? 2019/08/25 問題解決,按照以下這影片, https://www.youtube.com/watch?v=XkDPl8k7MKk 先謝謝各位熱心解答,小弟感激不盡。