A program based on POI to read basic grade from Excel and calulate final grades(a1,a2,f1) used some specific formula.
a1 is the weighted mean grade of the scores of our required courses and the courses we limited to choose. a2 is 0.002 times of the product of the scores and the credit of every courses we can choose as we like. f1 = a1+a2.
note: XSSF is used to execute Excel Xlsx. HSSF is used to execute Excel Xls.