tomcat端口被占用了怎么办

在企业版Eclipse中，在已经启动了Tomcat服务器后，准备运行页面或Servlet时，有时会出现这样的关于Tomcat服务器端口占用的问题：
“Several ports (8005, 8080, 8009) required by Tomcat v6.0 Server at localhost are already in use. The server may already be running in another process, or a system process