Batch Jobs to Transfer excel to SAP

Dear All,

The following is my requirement categorised into simple points:

1) After successful authentication, the user should be able to upload the excel sheet into temporary location.

2) Triggering the Batch Job in the temporary location at the end of day which should load the data into SAP.

3) After the data is loaded into SAP, it will be displayed for approval in portal.

I think point 3 is acheivable seems to be straight forward. I am concerned about the points 1 & 2.

Please let me know the way to achieve the same.

Thanks

Mano