端口被占用问题
The Tomcat connector configured to listen on port 8003 failed to start. The port may already be in use or the connector may be misconfigured
打开 cmd, 输入netstat -ano,查询端口
查询被占用的端口netstat -ano |finder +被占用的端口
结束进程，释放端口，taskkill /f /t /im +被占用的端口