I am trying to convert excel file into PDF file in wicket 8 application by using these below APIs. But PDF file is not converting into excel file and I am getting that same excel file on the PDF download link instead of PDF file and there is no exception or error on convert() method.
<dependency>
    <groupId>net.sf.jodconverter</groupId>
    <artifactId>jodconverter</artifactId>
    <version>3.0-beta-4</version>
</dependency>
or
<dependency>
    <groupId>com.artofsolving</groupId>
    <artifactId>jodconverter</artifactId>
    <version>2.2.1</version>
</dependency>
Using this below code to convert excel file to PDF file
public File convertToPDFFile(ByteArrayOutputStream fromExcelFile, String sheetName, OOConfig ooConfig, FileFormat fileFormat) throws Exception {
    File tempFile = null;
    File resultPDFFile = null;
    try {
        tempFile = File.createTempFile(sheetName, fileFormat.getFileExtension());
        tempFile.setWritable(true);
        FileOutputStream fout = new FileOutputStream(tempFile);
        fromExcelFile.writeTo(fout);
        ExternalOfficeManagerConfiguration eomcTest = new ExternalOfficeManagerConfiguration();
        eomcTest.setConnectOnStart(true);
        eomcTest.setConnectionProtocol("SOCKET");
        eomcTest.setPortNumber(8100);
        OfficeManager officeManager = eomcTest.buildOfficeManager();
        officeManager.start();
        OfficeDocumentConverter officeDocConverter = new OfficeDocumentConverter(officeManager);
        resultPDFFile = File.createTempFile(sheetName, TypeOfFile.PDF.getFileExtension());
        officeDocConverter.convert(tempFile, resultPDFFile);
        fout.close();
        officeManager.stop();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (tempFile != null) {
            tempFile.delete();
            tempFile = null;
        }
    }
    return resultPDFFile;
}
Kindly anyone let me know why jodconverter not converting excel file into pdf file.
Any suggestions will be highly appreciable.