有時候執行程式總會報如下錯誤：

Several ports (8080, 8009) required by Tomcat v7.0 Server at localhost are already in use. The server may already be running in another process, or a system process may be using the port. To start this server you will need to stop the other process or change the port number(s).

解決方法：

一、檢視站用埠號的程序號

命令：lsof -i :<埠號>
例如：

root$ lsof -i :8080
COMMAND   PID   USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
java    48168   root   54u  IPv6 0x2a670557f4dd04dd      0t0  TCP *:http-alt (LISTEN)

二、殺死站用指定埠號的程序

命令：kill -9 <程序ID>
例如：kill -9 48168

三、重新執行tomcat或者專案