1. Open Task Manager - for more information, see the corresponding process PID
2. The end of the process method
Forced (/ F parameter) xxx kill PID for all processes, including child process (/ T parameters):
taskkill /T /F /PID xxx
3. To release a port number, you need to see the occupation of the port number PID
netstat -aon | findstr "8081" // view the port number 8081 corresponding to the process PID