解决Tomcat 端口被占用问题.Several ports (8005, 8080, 8009) required by Tomcat

错误提示：
Several ports (8005, 8080, 8009) required by Tomcat v9.0 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).

翻译：tomcat端口号被占用，但看eclipse里server并没有启动tomcat；而本地也没有开启tomcat。那怎么解决？

解决方案：
1,独立运行的Tomcat没有关闭.
自安装的tomcat程序设置开机自动运行,或者在之前运行过,先关闭ecplipse或jbuilder,在任务管理器中找到Tomcat的进程,将其 kill掉,即可.有时候Tomcat非法关闭时,在进程中,仍然存在,仍然占用8080端口.所以只要将其进程javaw杀掉.就可以解决.

2,安装了其他的软件占用了Tomcat的端口.
用可以查看端口的工具查看一下,或者,直接改掉tomcat的默认端口.即可.