@echo off & setlocal EnableDelayedExpansion
set obj[0]=Tomcat端口号
set port=0
set pid=0
for /f "usebackq delims== tokens=1-2" %%a in (`set obj`) do (
  set port=%%b
  for /f "tokens=5" %%m in ('netstat -aon ^| findstr ":%%b"') do (
    set pid=%%m
  )
  if "!pid!"=="0" (
    echo the port !port! is released
  ) else (
    taskkill /f /pid !pid!
    echo the port !port! is released
  )
  set pid=0
)
start/d "Tomcat根路径\bin" startup.bat
@echo on