RaqForum 41 No.
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Split a large csv file into smaller files

 

A csv file has a size far greater than 5M. Below is part of its data:

OrderID,Client,SellerID,Amount,OrderDate

1,SPLI,219,9173,01/17/2022

2,HU,110,6192,10/01/2020

3,SPL,173,5659,04/23/2020

4,OFS,7,3811,02/05/2023

5,ARO,146,3752,08/27/2021

Use Java to do this: Split the file into smaller files, each having a size of about 5M; file names contain ordinal numbers, such as Orders1.csv and Orders2.csv. One record should only be put into one file.

Write the following SPL code:

1

=file("d:/OrdersBig.csv")

2

=A1.size()\(1000*1000*5)+1

3

=A2.(T("d:/Orders" / ~ / ".csv",A1.cursor@ts(;~:A2)))

A2: Compute the number of smaller files (N) the csv file will be divided into. Symbol \ performs the division and gets only the integer part; +1 makes the size of each smaller file is a bit less than 5M.

A3: Loop from 1 to N: approximately, divide the large file into N parts according to the size; retrieve the ith part each time to write to a new file while automatically ensuring that records are complete.

Read How to Call a SPL Script in Java to find how to integrate SPL into a Java application.

Source:https://stackoverflow.com/questions/70516423/how-to-create-multiple-csv-file-from-large-csv-file-in-java


 
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