结合两份Jasper报告

我有一个带有下拉列表的Web应用程序，用户可以从中选择报告类型。 report1，report2，report3等

根据所选报告，在服务器上编译Jasper报告，并以PDF格式弹出。

在服务器端，我使用下面的代码以单独的方法实现每个报告，例如对于report1：

JRBeanCollectionDataSource report1DataSource = new JRBeanCollectionDataSource(resultSetBeanListReport1); InputStream inputStreamReport1 = new FileInputStream(request.getSession().getServletContext ().getRealPath(jrxmlFilePath + "report1.jrxml")); JasperDesign jasperDesignReport1 = JRXmlLoader.load(inputStreamReport1); JasperReport jasperReportReport1 = JasperCompileManager.compileReport(jasperDesignReport1); bytes = JasperRunManager.runReportToPdf(jasperReportReport1, titleMapReport1, report1DataSource); 

同样，report2使用以下代码的单独方法：

 JRBeanCollectionDataSource invstSummDataSource = new JRBeanCollectionDataSource(resultSetBeanListInvstOfSumm); InputStream inputStreamInvstSumm = new FileInputStream(request.getSession().getServletContext().getRealPath(jrxmlFilePath + "investSummary.jrxml")); JasperDesign jasperDesignInvstSumm = JRXmlLoader.load(inputStreamInvstSumm); JasperReport jasperReportInvstSumm = JasperCompileManager.compileReport(jasperDesignInvstSumm); bytes = JasperRunManager.runReportToPdf(jasperReportInvstSumm, titleMapInvstSumm, invstSummDataSource); 

现在我要求如果从下拉列表中选择report1，则生成的PDF应该在同一PDF中一个接一个地包含所有报告。

如何组合上面两行代码以最终生成单个PDF？

Answer 1

以下是组合多个jasper打印的示例代码

 List jasperPrints = new ArrayList(); // 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 2

这个答案是帮助用户使用最新版本的Jasper-Report。 在@Sangram Jadhav接受回答JRExporterParameter.JASPER_PRINT_LIST已被弃用

目前的代码是：

 Map paramMap = new HashMap(); List jasperPrintList = new ArrayList(); 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(); 

Answer 3

您可以在使用JasperPrint生成PDF之前或使用iText生成PDF之前合并报告。

对于JasperPrint解决方案：您将生成2个（或更多） JasperPrint然后获取内容页面并连接它们。

 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); 

对于生成PDF后的iText解决方案：

 void concatPDFs(List streamOfPDFFiles, OutputStream outputStream, boolean paginate) { Document document = new Document(); try { List pdfs = streamOfPDFFiles; List readers = new ArrayList(); int totalPages = 0; Iterator 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 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 4

这是我在grails代码和java上使用的代码.Its在一个pdf中给出了两个不同的报告。

 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 jasperPrintList = new ArrayList(); 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()