CSV JAVA JAVASCRIPT

Parse csv file

Hello,
Need help (new in BonitaSW)... so
I need to read CSV file (delimited with ','), to:
* extract fields names and show them to a user;
* let user choose the field(s) name (and index?);
* convert/change the content of the chosen field;
* export it to another CSV/Excel etc with the same field order;

I can't find a way to read the CSV file :(
What I've done so far:

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