Apache Excel POI Utils : A Java Excel API java by devs5003 - December 10, 2021April 9, 20220 Apache Excel POI Utils : A Java Excel API (No need to create row or cell each time) What is Apache POI ? Why is it so popular to utilize? Apache POI is an open source Java API. It allows developers to create, modify, and display MS Office files using Java programs. Also, Apache POI is developed by Apache Software Foundation to operate on Microsoft Office files as a Java program. Furthermore, It is the most popular API and up to date to work with newer versions of MS Office files. On the other hand, some other available APIs are JEXCEL, JXLS, FILLO, APACHE COMMONS CSV etc. However, Apache POI provides stream-based processing which is suitable for large files & requires less memory.