Combine rows from 2 files and write to DB using Spring Batch

[Aruna Ponaka]

I have File1.csv, with the columns id,name,age. File2.csv has the columns id,designation. In both the files ID refers to same value and is unique.

File1.csv

id    name    age
101   abc     30
102   def     25

File2.csv

id     designation
101    manager
102    Assistant manager

Spring batch should read the files simultaneously, combine the data and write to DB as below

id   name    age   designation
101  abc     30     manager
102  def     25     Assistant manager

How to read 2 files simultaneously in spring batch?