如果你可以使用 7z.exe，你或许可以这样做:

If you can use 7z.exe, you may be able to do something like this:

& 'C:Program Files7-Zip7z.exe' l <zipfilename> |
  Select-Object -Last 1 |
  Select-String '([0-9]+) files, ([0-9]+) folders' |
  ForEach-Object {
    $fileCount = [Int] $_.Matches[0].Groups[1].Value
    $dirCount = [Int] $_.Matches[0].Groups[2].Value
  }