curious Liferay:
is something worng with my question? or is it in the wrong place? why nobody is replying?
Nothing wrong with the question - but generally replies take up to a day to come in, not everyone in the community is awake when you write them
As far as your question, it is possible to drop files into a directory and have them picked up by the document library - but not in the way you are thinking.
Documents in the doclib are stored in a repository (similar to your OS's filesystem). To get a document into the document library, it must be submitted one of three ways:
1. Via the Document Library GUI and it's "Upload File" option
2. Via the Document Library APIs by writing code to inject the file into the doclib.
3. Via WebDAV
The easiest way for you to get your files into doclib using drag/drop is by first mounting it via WebDAV - this will make the document library appear as a folder on your desktop, and then you can drop files into it, and then they will be accessible to other portal users.
You can also write custom code to inject your files (see here) but that requires more work.
For instructions on using WebDAV, see here.
