Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

Section currentSection = builder.getCurrentSection();
PageSetup pageSetup = currentSection.getPageSetup();

// Specify if we want headers/footers of the first page to be different from other pages.
// You can also use PageSetup.OddAndEvenPagesHeaderFooter property to specify
// different headers/footers for odd and even pages.
pageSetup.setDifferentFirstPageHeaderFooter(true);

// --- Create header for the first page. ---
pageSetup.setHeaderDistance(20);
builder.moveToHeaderFooter(HeaderFooterType.FOOTER_FIRST);
builder.getParagraphFormat().setAlignment(ParagraphAlignment.CENTER);

// Specify header title for the first page.
builder.write("(C) 2001 Aspose Pty Ltd. All rights reserved.");

private static ObjectFactory objectFactory = new ObjectFactory();
static String dataPath = "src/featurescomparison/workingwithheaderfooter/addfooter/data/";

public static void main(String[] args) throws Exception {

    WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage
            .createPackage();
    // Delete the Styles part, since it clutters up our output
    MainDocumentPart mdp = wordMLPackage.getMainDocumentPart();
    Relationship styleRel = mdp.getStyleDefinitionsPart().getSourceRelationships().get(0);
    mdp.getRelationshipsPart().removeRelationship(styleRel);        

    // OK, the guts of this sample:
    // The 2 things you need:
    // 1. the Header part
    Relationship relationship = createFooterPart(wordMLPackage);
    // 2. an entry in SectPr
    createFooterReference(wordMLPackage, relationship);

    // Display the result as Flat OPC XML
    FlatOpcXmlCreator worker = new FlatOpcXmlCreator(wordMLPackage);
    worker.marshal(System.out);

    // Now save it 
    wordMLPackage.save(new java.io.File(dataPath + "OUT_Footer.docx") );

}

public static Relationship createFooterPart(
        WordprocessingMLPackage wordprocessingMLPackage)
        throws Exception {

    FooterPart footerPart = new FooterPart();
    Relationship rel =  wordprocessingMLPackage.getMainDocumentPart()
            .addTargetPart(footerPart);

    // After addTargetPart, so image can be added properly
    footerPart.setJaxbElement(getFtr(wordprocessingMLPackage, footerPart));

    return rel;
}

public static void createFooterReference(
        WordprocessingMLPackage wordprocessingMLPackage,
        Relationship relationship )
        throws InvalidFormatException {

    List<SectionWrapper> sections = wordprocessingMLPackage.getDocumentModel().getSections();

    SectPr sectPr = sections.get(sections.size() - 1).getSectPr();
    // There is always a section wrapper, but it might not contain a sectPr
    if (sectPr==null ) {
        sectPr = objectFactory.createSectPr();
        wordprocessingMLPackage.getMainDocumentPart().addObject(sectPr);
        sections.get(sections.size() - 1).setSectPr(sectPr);
    }

    FooterReference footerReference = objectFactory.createFooterReference();
    footerReference.setId(relationship.getId());
    footerReference.setType(HdrFtrRef.DEFAULT);
    sectPr.getEGHdrFtrReferences().add(footerReference);// add header or
    // footer references
}

public static Ftr getFtr(WordprocessingMLPackage wordprocessingMLPackage,
        Part sourcePart) throws Exception {

    Ftr ftr = objectFactory.createFtr();

    File file = new File(dataPath + "java_logo.png" );
    java.io.InputStream is = new java.io.FileInputStream(file );

    ftr.getContent().add(
            newImage(wordprocessingMLPackage,
                    sourcePart, 
                    BufferUtil.getBytesFromInputStream(is), 
                    "filename", "alttext", 1, 2
                    )
    );
    return ftr;
}

public static org.docx4j.wml.P newImage( WordprocessingMLPackage wordMLPackage,
        Part sourcePart,
        byte[] bytes,
        String filenameHint, String altText, 
        int id1, int id2) throws Exception {

    BinaryPartAbstractImage imagePart = BinaryPartAbstractImage.createImagePart(wordMLPackage, 
            sourcePart, bytes);

    Inline inline = imagePart.createImageInline( filenameHint, altText, 
            id1, id2, false);

    // Now add the inline in w:p/w:r/w:drawing
    org.docx4j.wml.ObjectFactory factory = Context.getWmlObjectFactory();
    org.docx4j.wml.P  p = factory.createP();
    org.docx4j.wml.R  run = factory.createR();      
    p.getContent().add(run);        
    org.docx4j.wml.Drawing drawing = factory.createDrawing();       
    run.getContent().add(drawing);      
    drawing.getAnchorOrInline().add(inline);

    return p;
}