Import data from XLS and XLSX (Excel) to ADF Table Using Apache POI

I need to add the ability to upload an XLSX file in an existing project. I act according to the instructions http://www.awasthiashish.com/2017/01/import-data-from-xls-and-xlsx-excel-to.html. The question is that when I select an XLSX file, nothing happens. I put the logs inside the uploadFileVCE method, when I upload a file it doesn't output anything, as if it doesn't even enter the method. Help, can anyone come across.

ADF version: Studio Edition Version 12.2.1.0.0

Here is my jsff file:

<af:inputFile label="Upload file" id="if1"
valueChangeListener="#{pageFlowScope.Class1Bean.uploadFileVCE}"
autoSubmit="true" 
labelStyle="font-weight:bold;color:navy;"/>

here is my Bean class:

 public void uploadFileVCE(ValueChangeEvent valueChangeEvent) {
        log.warn("FIRST");
            UploadedFile file = (UploadedFile) valueChangeEvent.getNewValue();
            log.warn("SECOND");
            try {
                //Check if file is XLSX
                log.warn("THIRD");
                if (file.getContentType().equalsIgnoreCase("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet") ||
                    file.getContentType().equalsIgnoreCase("application/xlsx")) {
                    log.warn("FOURTH");
                    readNProcessExcelx(file.getInputStream()); //for xlsx

                }
                //Check if file is XLS
                else if (file.getContentType().equalsIgnoreCase("application/vnd.ms-excel")) {

                    if (file.getFilename().toUpperCase().endsWith(".XLS")) {
                       // readNProcessExcel(file.getInputStream()); //for xls
                    }

                } else {
                    FacesMessage msg = new FacesMessage("File format not supported.-- Upload XLS or XLSX file");
                    msg.setSeverity(FacesMessage.SEVERITY_WARN);
                    FacesContext.getCurrentInstance().addMessage(null, msg);
                }
                AdfFacesContext.getCurrentInstance().addPartialTarget(empTable);

            } catch (Exception e) {
                log.warn(e);
            }
        }

The solution to this problem is to add a parameter usesUpload="true". I have this form <af:form was set in another .jsff file, so I added the usesUpload="true" parameter to the file where the form was located.