结合两个 Jasper 报告 [英] Combining two Jasper reports

问题描述

我有一个带有下拉菜单的 Web 应用程序，用户可以从中选择报告类型.报告1、报告2、报告3等

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

根据选择的报告，在服务器上编译 Jasper 报告并以 PDF 格式弹出窗口打开.

Based on the report selected, a Jasper report is compiled on the server and opens as a pop up in PDF format.

在服务器端，我使用以下代码以单独的方法实现每个报告，例如对于报告1:

On the server side, I am implementing each report in a separate method using below code say for e.g. for 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 是在一个单独的方法中，代码如下:

Similarly, report2 is in a separate method with below code:

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);

现在我有一个要求，如果从下拉列表中选择了 report1，则生成的 PDF 应该在同一个 PDF 中一个接一个地包含所有报告.

Now I have a requirement that if report1 is selected from the dropdown, the resulting PDF should contain all the reports one after other in the same PDF.

如何结合以上两行代码最终生成一个PDF?

How can I combine above two lines of codes to finally generate a single PDF?

推荐答案

这里是组合多个碧玉印花的示例代码

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();

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