eclipse提示Port 8080 required by Tomcat v8.0 Server at localhost is already in use.

启动tomcat服务器时提示
Port 8080 required by Tomcat v8.0 Server at localhost is 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).
端口：8080被占用导致启动失败，

最后发现是之前电脑蓝屏自动关机，当时启动服务器占用的端口却没有被清空，所以这里启动后台任务管理器，结束javaw.exe进程后再启动服务器就可以了