How can I do a link to an external directory

Hi everyone.
I´m trying to develop a portlet with vaadin 6.8.7, and need make a list of documentes to download from a directory host in the D://temp/documents (it´s the directory where I upload the documents from the liferay portal), but I need made a list of all these documents and show it like links to the user can download.
How can I do it.