public  void doExport(OutputStream out) throws JspException 
{
        try
        {
            Document document = new Document(PageSize.A4.rotate(), 60, 60, 40, 40);
            this.initItextWriter(document, out);
            document.open();
            Table table = new Table(this.model.getNumberOfColumns());
            ItextTableWriter writer = new ItextTableWriter(table, document);
            writer.writeTable(this.model, "-1");
            document.add(table);
            document.close();
        }
        catch (Exception e)
        {
            throw new ItextGenerationException(e);
        }
}

 public String getMimeType() 
{
        return null;
}

 abstract protected  void initItextWriter(Document document,
    OutputStream out) throws DocumentException
Initializes the iText writer used by export view to write iText document, such as PDF or RTF iText writer.

 public  void setParameters(TableModel tableModel,
    boolean exportFullList,
    boolean includeHeader,
    boolean decorateValues) 
{
        this.model = tableModel;
}