How to compare two dat files in spring batch

Question

How to compare two dat files in spring batch. Dat file contains large amount of data and we need to compare them by Columns and we need to store the dat file data into array list

Answer 1

Works for dat files as for any other text file:
https://www.petrikainulainen.net/programming/spring-framework/spring-batch-tutorial-reading-information-from-a-file