[development] Import data from excel into drupal

Hi! I would like implement a functionality in a web site for able to upload an excel file, with a determined format, and then, I want to generate nodes with this information. Exists a module or a medium to do that? or how can i insert data into drupal database from an excel file? thanks a lot -- "La perseverancia es un árbol de raíces amargas, pero de frutos muy dulces." Gastón Pablo Perez Email:gpperez@gmail.com <Email%3Agpperez@gmail.com>