'Starting Tomcat v9.0 Server at localhost' has encountered a problem. Port 8080 required by Tomcat v9.0 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). 解决方法
查找占用端口号8080的命令：netstat -aon|findstr “8080”
然后去任务管理器，把相关的PID关闭即可。
标签：use,already,8080,Tomcat,process,Server,localhost From： https://www.cnblogs.com/wangxi0755/p/18073735