调试服务或程序时，通常通过检测相应的端口是否打开来确定服务是否成功启动。 本示例使用mysql的3306进行实验。
看看3306端口是否已经在使用
一、看端口占用
netstat -aon|findstr '3306 '
二.查看id对应的程序
任务列表| findstr ' 6572 '
===========================
c :usersadministrator netstat-aon|findstr ' 3306 '
TCP0.0.0. 0:33060.0.0.0:0 listening 1948
TCP 192.168.1.12933605333192.168.0.20033603306 established 7480
TCP 192.168.26.1336054305192.168.26.12933603306 established 6572
TCP 192.168.26.1336054306192.168.26.12833603306 established 6572
TCP 192.168.26.1336054340192.168.26.12833603306 established 6572
TCP 192.168.26.1336054341192.168.26.12933603306 established 6572
TCP 192.168.26.1336054342192.168.26.12833603306 established 6572
TCP 192.168.26.1336054343192.168.26.12833603306 established 6572
TCP 192.168.26.1336054344192.168.26.12933603306 established 6572
TCP 192.168.26.1336054345192.168.26.12933603306 established 6572
TCP 192.168.26.133605468192.168.26.12833603306 established 6572
TCP 192.168.26.133605469192.168.26.12833603306 established 6572
TCP 192.168.26.1336054470192.168.26.12933603306 established 6572
TCP 192.168.26.1336054471192.168.26.12933603306 established 6572
TCP 192.168.26.1336054791192.168.26.12933603306 established 6572
TCP 192.168.26.1336054792192.168.26.12833603306 established 6572
TCP 192.168.26.1336054859192.168.26.12933603306 established 6572
TCP 192.168.26.1336054860192.168.26.12833603306 established 6572
c :usersadministrator任务列表| findstr ' 6572 '
ava.exe 6572控制台1300，288k