HOW TO READ EXCEL FILE IN GROOVY

I am reading an excel file like below using poi3.6 jars

commons-collections4-4.1.jar
commons-collections4-4.1-javadoc.jar
commons-compress-1.18.jar
poi-3.16.jar
poi-examples-3.16.jar
poi-excelant-3.16.jar
poi-ooxml-3.16.jar
poi-ooxml-schemas-3.16.jar
poi-scratchpad-3.16.jar

FileInputStream file = new FileInputStream(new File('D:\\sample.xls'));
XSSFWorkbook workbook1 = new XSSFWorkbook(file)
XSSFSheet sheet1 = workbook1.getSheetAt(0)
Iterator ite = sheet1.rowIterator();

But always getting the error like 

• Thu Jan 31 15:03:13 IST 2019:ERROR:An error occurred [org/openxmlformats/schemas/spreadsheetml/x2006/main/CTExtensionList], see error log for details

Is there any other easy method of reading from an excel. Pplease help.