Combining two Jasper reports

Question

I have a web application with a dropdown from where user could select the type of report viz. report1, report2, report3, etc.

Based on the report selected, a Jasper

Answer 1

You can either merge reports before generating PDFs using JasperPrint or after generating PDFs using iText.

For the JasperPrint solution: you will generate the 2 (or more) JasperPrints then get the content pages and concat them.

JasperPrint jp1 = JasperFillManager.fillReport(url.openStream(), parameters,
                    new JRBeanCollectionDataSource(inspBean));
JasperPrint jp2 = JasperFillManager.fillReport(url.openStream(), parameters,
                    new JRBeanCollectionDataSource(inspBean));

List pages = jp2 .getPages();
for (int j = 0; j < pages.size(); j++) {
    JRPrintPage object = (JRPrintPage)pages.get(j);
    jp1.addPage(object);
}
JasperViewer.viewReport(jp1,false);

For the iText solution after generating the PDFs:

void concatPDFs(List<InputStream> streamOfPDFFiles, OutputStream outputStream, boolean paginate) {

    Document document = new Document();
    try {
      List<InputStream> pdfs = streamOfPDFFiles;
      List<PdfReader> readers = new ArrayList<PdfReader>();
      int totalPages = 0;
      Iterator<InputStream> iteratorPDFs = pdfs.iterator();

      // Create Readers for the pdfs.
      while (iteratorPDFs.hasNext()) {
        InputStream pdf = iteratorPDFs.next();
        PdfReader pdfReader = new PdfReader(pdf);
        readers.add(pdfReader);
        totalPages += pdfReader.getNumberOfPages();
      }
      // Create a writer for the outputstream
      PdfWriter writer = PdfWriter.getInstance(document, outputStream);

      document.open();
      BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
      PdfContentByte cb = writer.getDirectContent(); // Holds the PDF
      // data

      PdfImportedPage page;
      int currentPageNumber = 0;
      int pageOfCurrentReaderPDF = 0;
      Iterator<PdfReader> iteratorPDFReader = readers.iterator();

      // Loop through the PDF files and add to the output.
      while (iteratorPDFReader.hasNext()) {
        PdfReader pdfReader = iteratorPDFReader.next();

        // Create a new page in the target for each source page.
        while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
          document.newPage();
          pageOfCurrentReaderPDF++;
          currentPageNumber++;
          page = writer.getImportedPage(pdfReader, pageOfCurrentReaderPDF);
          cb.addTemplate(page, 0, 0);

          // Code for pagination.
          if (paginate) {
            cb.beginText();
            cb.setFontAndSize(bf, 9);
            cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "" + currentPageNumber + " of " + totalPages, 520, 5, 0);
            cb.endText();
          }
        }
        pageOfCurrentReaderPDF = 0;
      }
      outputStream.flush();
      document.close();
      outputStream.close();
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      if (document.isOpen())
        document.close();
      try {
        if (outputStream != null)
          outputStream.close();
      } catch (IOException ioe) {
        ioe.printStackTrace();
      }
    }
  }

Answer 2

You can try this one this is work for me

JasperPrint jp1 = JasperFillManager.fillReport(reportFile1,reportParams,Connection);  
JasperPrint jp2 = JasperFillManager.fillReport(reportFile2,reportParams,Connection);  
for (int j = 0; j < jp1.getPages().size(); j++) {  
    //Add First report to second report
    jp2.addPage((JRPrintPage) jp1.getPages().get(j));  
} 

Answer 3

Here is sample code for combining multiple jasper prints

List<JasperPrint> jasperPrints = new ArrayList<JasperPrint>();
// Your code to get Jasperreport objects
JasperReport jasperReportReport1 = JasperCompileManager.compileReport(jasperDesignReport1);
jasperPrints.add(jasperReportReport1);
JasperReport jasperReportReport2 = JasperCompileManager.compileReport(jasperDesignReport2);
jasperPrints.add(jasperReportReport2);
JasperReport jasperReportReport3 = JasperCompileManager.compileReport(jasperDesignReport3);
jasperPrints.add(jasperReportReport3);

JRPdfExporter exporter = new JRPdfExporter();
//Create new FileOutputStream or you can use Http Servlet Response.getOutputStream() to get Servlet output stream
// Or if you want bytes create ByteArrayOutputStream
ByteArrayOutputStream out = new ByteArrayOutputStream();
exporter.setParameter(JRExporterParameter.JASPER_PRINT_LIST, jasperPrints);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, out);
exporter.exportReport();
byte[] bytes = out.toByteArray();

Answer 4

Here is my code which i use on grails code as well as java.Its gives me two different report in one pdf.

String reportDir = Util.getReportDirectory() // my report directory
Map reportParams = new LinkedHashMap()
Map reportParams1 = new LinkedHashMap()

String outputReportName="Test_Output_copy"

reportParams.put('parameter name',"parameter")
reportParams1.put('copy',"Customer's Copy")

JasperReportDef reportDef1 = new JasperReportDef(name: 'testBillReport.jasper', fileFormat: JasperExportFormat.PDF_FORMAT,
            parameters: reportParams, folder: reportDir)
JasperReportDef reportDef2 = new JasperReportDef(name: 'testBillReport.jasper', fileFormat: JasperExportFormat.PDF_FORMAT,
            parameters: reportParams1, folder: reportDir)

List<JasperReportDef> jasperPrintList = new ArrayList<JasperReportDef>();
    jasperPrintList.add(reportDef1);
    jasperPrintList.add(reportDef2);

ByteArrayOutputStream report1 = jasperService.generateReport(jasperPrintList);
    response.setHeader("Content-disposition", "inline;filename="+outputReportName+'.pdf')
    response.contentType = "application/pdf"
    response.outputStream << report1.toByteArray()

Answer 5

This answer is to help user using latest version of Jasper-Report. In @Sangram Jadhav accept answer the JRExporterParameter.JASPER_PRINT_LIST is deprecated

The current code would be:

Map<String, Object> paramMap = new HashMap<String, Object>();
List<JasperPrint> jasperPrintList = new ArrayList<JasperPrint>();
JasperPrint jasperPrint1 = JasperFillManager.fillReport(report1, paramMap);
jasperPrintList.add(jasperPrint1);
JasperPrint jasperPrint2 = JasperFillManager.fillReport(report2, paramMap);
jasperPrintList.add(jasperPrint2);

JRPdfExporter exporter = new JRPdfExporter();
exporter.setExporterInput(SimpleExporterInput.getInstance(jasperPrintList)); //Set as export input my list with JasperPrint s
exporter.setExporterOutput(new SimpleOutputStreamExporterOutput("pdf/output.pdf")); //or any other out streaam
SimplePdfExporterConfiguration configuration = new SimplePdfExporterConfiguration();
configuration.setCreatingBatchModeBookmarks(true); //add this so your bookmarks work, you may set other parameters
exporter.setConfiguration(configuration);
exporter.exportReport();