Java – Convert Excel File to/from JSON (String/File) – using Apache Poi + Jackson

convert-excel-file-to-from-json-file-string---feature-image

In the tutorial, Grokonez shows how to convert Excel File to JSON String or JSON File and vice versa with Java language by examples.

Dependencies

Excel to JSON

Excel File to JSON String

We do 2 steps:
– Step 1: Read Excel File into Java List Objects
– Step 2: Convert Java List Objects to JSON String

-> Excel File: customers

convert-excel-file-to-from-json-file-string---excel-file

Customer.java:

-> Convert Implemetation:

-> Output:

-> Pretty-Printed:

Excel File to JSON File

We do 2 steps:
– Step 1: Read Excel File into Java List Objects
– Step 2: Write Java List Objects to JSON File

-> Implementation:

JSON to Excel

JSON String to Excel File

We do 2 steps:
– Convert JSON String to Java List Objects
– Write Java List Objects to Excel File

-> Implementation:

JSON File to Excel File

– Step 1: Read JSON File into Java List Objects
– Step 2: Convert Java List Objects to Excel File

-> Implementation:

– Project Structure:

convert-excel-file-to-from-json-file-string---project-structure

By grokonez | February 23, 2019.



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27 thoughts on “Java – Convert Excel File to/from JSON (String/File) – using Apache Poi + Jackson”

  1. Amazing tutorial. Used it via Kotlin when I had to convert from JSON to Excel. Good approach. Keep up! Quick question, any idea of how to recheck existence of the same name of excel file on the PC?

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