How to read the .csv report data into the apex. then that csv file data send to the pdf. Please help me for this requirement.

I want to generate the report as .csv r .xls.  Then take that file data and conver into pdf. 

How to read the .csv report data into the apex. then that csv file data send to the pdf. Please help me for this requirement.

I want to generate the report as .csv r .xls.  Then take that file data and conver into pdf.