The Apache POI in Selenium is a widely used API for selenium data driven testing. It can read, write and modify data in Excel 95, 97, 2000, and 2003 spreadsheets. As we know JXL doesn't support Excel 2007 ". As we, all know Selenium support only browser automation, so for reading and writing with. Data driven testing In Selenium using JXL (Part 1). So we normally two jar file(Binaries) JXL(Java Excel API) and Apache POI to make Data Driven test framework for WebDriver.