How to recalculate page number when combining multiple jasper reports in export?

Question

I have decided to pass this Q/A after receiving both questions in chat and comment on answer on how to handle page number in \"combined\" jasper reports

Whe

Answer 1

That's correct but if there are JRPrintFrame's and if your remark is in this code can not find it. Below is the one working for me: (You should find out in which container element the TOTAL_PAGE_NUMBER in!

private void correctPageNumbers(List jasperPrintList) {
// First loop on all reports to get totale page number
int totPageNumber = 0;
for (JasperPrint jp : jasperPrintList) {
    totPageNumber += jp.getPages().size();
}

// Second loop all reports to replace our markers with current and total
// number
int currentPage = 1;
for (JasperPrint jp : jasperPrintList) {
    List pages = jp.getPages();
    // Loop all pages of report
    for (JRPrintPage jpp : pages) {
        List elements = jpp.getElements();

        // Loop all elements on page
        for (JRPrintElement jpe : elements) {
            if (jpe instanceof JRSubreport) {
                JRSubreport jrr = (JRSubreport) jpe;
                jrr.getBackcolor();
            }
            // Check if text element
            if (jpe instanceof JRPrintText) {
                JRPrintText jpt = (JRPrintText) jpe;
                System.out.println("jpt.value: " + jpt.getValue() + "  |  " + "jpt.text" + jpt.getText());
                // Check if totale page marker
                if (TOTAL_PAGE_NUMBER.equals(jpt.getValue())) {
                    jpt.setText(" " + totPageNumber); // Replace marker
                }
            } else if (jpe instanceof JRTemplatePrintFrame) {
                List frameElements = ((JRTemplatePrintFrame) jpe).getElements();
                for (JRPrintElement jpef : frameElements) {
                    if (jpef instanceof JRPrintText) {
                        JRPrintText jpt = (JRPrintText) jpef;
                        System.out.println("jpt.value: " + jpt.getValue() + "  |  " + "jpt.text"
                                + jpt.getText());
                        // Check if totale page marker
                        if (TOTAL_PAGE_NUMBER.equals(jpt.getValue())) {
                            jpt.setText(" " + totPageNumber); // Replace
                                                                // marker
                        }
                    }
                }
            }
        }
        currentPage++;
    }
}

}