BAPI to create PO and GR

Hi,

Can anybody send me some sample code to handle multiple files in application server. My requirement is to create an interface to create PO and GR from the file residing in Application server. Multiple files will be in application server. No selection screens are there. BAPI used are BAPI_PO_CREATE1 and BAPI_GOODSMVT_CREATE. And If anyone has already created this interface, please give me some idea of how to read multiple files and if possible send some sample code.

Any help will be greatly appreciated.

Regards,

Naveen