function checkPid($result,$port){

    $port = $port.split(":")[1]

    if(($result.split())[6].split(":")[($result.split())[6].split(":").Count-1] -eq $port){

        $tPid = ($result.split())[($result.split()).count-1]

        if($tPid -ne ""){

            Write-Host "您查询的端口被以下程序占用：" -ForegroundColor Red

            $target = tasklist|findstr $tPid

            Write-Host $target

            $sig = $true

        }else{

            $sig = $false

        }

    }else{

        $sig = $false

    }

    $sig

}

function checkPort($port){

    $port = ":" + $port

    $results = netstat -ano|findstr $port

    if($results.count -gt 0){

        if($results.count -eq 1){

            $sig = checkPid $results $port

            if($sig -eq $false){

                Write-Host "您所查询的端口未被占用！" -ForegroundColor Green

            }

        }else{

            foreach($result in $results){

                if($result){

                   $sig = checkPid $result $port

                   if($sig -eq $true){

                       break

                   }

                }

            }

            if($sig -eq $false){

                Write-Host "您所查询的端口未被占用！" -ForegroundColor Green

            }

        }

    }else{

        Write-Host "您所查询的端口未被占用！" -ForegroundColor Green

    }

}

$port = $null

while($port -ne "exit()"){

    $port = Read-Host "请输入要查询的端口号"

    if($port -eq "exit()"){

        break

    }

    checkPort $port

}