How to read multipart excel file in spring boot

In Java, reading an Excel file is not similar to reading a Word file because of cells in an Excel file.

JDK does not provide a direct API to read data from Excel files for which we have to toggle to a third-party library that is Apache POI. Apache POI is an open-source java library designed for reading and writing Microsoft documents in order to create and manipulate various file formats based on Microsoft Office.

Using POI, one should be able to perform create, modify and display/read operations on the following file formats. 
For Example, Java doesn’t provide built-in support for working with excel files, so we need to look for open-source APIs for the job. Apache POI provides Java API for manipulating various file formats based on the Office Open XML (OOXML) standard and OLE2 standard from Microsoft.

Apache POI releases are available under the Apache License (V2.0). 

Writing an Excel File 

Earlier we introduced Apache POI- a Java API useful for interacting with Microsoft Office documents. N

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