参考http://www.rabiachrafi.com/2008/03/how-to-upload-multiple-files-using-moss.html
There are a number of ways to upload files to MOSS 2007. However, if you want to upload folders while maintaining the folder structure then using the "Explorer View" feature is your best bet. To do this simply click on the All Documents button located at the top right hand corner of the document library and select Explorer View as shown below:
You can now upload any file or folder by simply dragging and dropping them into the web browser! As you can see this is a far more elegant method of uploading folders into SharePoint than using the other methods which prevent you from uploading folders.
