JExcelApi
JExcelApi is a Java library for reading, writing, and manipulating Excel files in the XLS format (Microsoft Excel 97-2003). It provides a simple API to create spreadsheets, add data, format cells, and perform basic operations without requiring Microsoft Excel to be installed. The library is lightweight and commonly used in Java applications for generating reports or processing Excel data programmatically.
Developers should learn JExcelApi when working on Java projects that need to handle legacy Excel files in the XLS format, especially in environments where newer formats like XLSX are not required. It's useful for tasks such as automating report generation, data import/export, or batch processing of spreadsheets in enterprise applications. However, for modern Excel files (XLSX), alternatives like Apache POI are more recommended due to better support and features.