Java POI the supplied data appears to be in the Office 2007+ XML

Question

I am getting this error:

org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are call

Answer 1

well actually there is no OPCPackage, I am using https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml/3.5-beta5 so you have to:

import org.apache.poi.openxml4j.opc.Package;
....
Package fs = Package.open(new ByteArrayInputStream(container.getContent()));
            XSSFWorkbook wb = new XSSFWorkbook(fs);
            XSSFSheet sheet = wb.getSheetAt(0);
            XSSFRow row;
            XSSFCell cell;