如何组合多个JasperPrint对象以使一个报表具有混合页面方向

Question

该jasperPrint对象有纵向,但jasperPrint2对象有横向.我想结合两个jasperprints来生成一个pdf文件,但保持其原始方向.当我将jasperPrint2的页面添加到jasperPrint时,最终的jasperPrint具有纵向方向......我测试了jasperPrint.setOrientation(JasperReport.ORIENTATION_LANDSCAPE)但没有改变.

如何从保存原始方向的两个jasperprints生成一个pdf文件？

我有以下代码:

JasperReport report = (JasperReport) JRLoader.loadObject(reportFile2.getPath());
jasperPrint = JasperFillManager.fillReport(report, parameters, conn);

JasperReport report2 = (JasperReport) JRLoader.loadObject(reportFile.getPath());
jasperPrint2 = JasperFillManager.fillReport(report2, parameters, conn);

List pages = jasperPrint2.getPages();
for (int j = 0; j < pages.size(); j++) {
    JRPrintPage object = (JRPrintPage) pages.get(j);
    jasperPrint.addPage(object);
}

Answer 1

您可以通过批量导出来完成此操作。

//put all the jasperPrints you want to be combined into a pdf in this list
List<JasperPrint> jasperPrintList = new ArrayList<JasperPrint>();

JasperReport report = (JasperReport) JRLoader.loadObject(reportFile2.getPath());
jasperPrintList.add(JasperFillManager.fillReport(report, parameters, conn));

JasperReport report2 = (JasperReport) JRLoader.loadObject(reportFile.getPath());
jasperPrintList.add(JasperFillManager.fillReport(report2, parameters, conn));

ByteArrayOutputStream baos = new ByteArrayOutputStream();       
JRPdfExporter exporter = new JRPdfExporter();       
//this sets the list of jasperPrint objects to be exported and merged
exporter.setParameter(JRExporterParameter.JASPER_PRINT_LIST, jasperPrintList);
//the bookmarks is a neat extra that creates a bookmark for each jasper print
exporter.setParameter(JRPdfExporterParameter.IS_CREATING_BATCH_MODE_BOOKMARKS, Boolean.TRUE);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos);     
exporter.exportReport();        
return baos.toByteArray();