A: You might want to check out JExcelAPI, which is a mature, Java-based open source library that lets you read, write, and modify Excel spreadsheets. Here are a few of its many features: ...

As a third option, purchase a third-party library designed specifically for reading Excel files in Java. A quick Google search found: extenTech extenXLS .9 beta; Actuate Formula One for Java 9.0; ...