Spring boot Can'；t生成关于spring的jasper报告

我正在尝试使用JasperReports生成PDF文件，但是，不管我如何尝试，它都会给我一个NullPointerException

尝试查看，并更改了jasper属性文件，但它没有做任何事情，我仍然收到相同的错误

尝试了绝对路径、相对路径、以流形式获取资源，什么都没有

这是我用来生成报告的代码

public String generateInvoiceFor (Reservation reservation) throws JRException {

        JasperReport jasperReport = JasperCompileManager.compileReport("I:\\anoranzaHopefullyFinal\\src\\main\\resources\\jasper\\FacturaFinalFinal.jrxml");

        List<Reservation> reservations = reservationService.getAll();

        JRBeanCollectionDataSource jrBeanCollectionDataSource = new JRBeanCollectionDataSource(reservations);

        Map<String,Object> parameters = new HashMap<>();

        parameters.put("Idparam", reservation.getId());

        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, jrBeanCollectionDataSource);

        JasperExportManager.exportReportToPdfFile(jasperPrint, "jasper/jasperOutput/Factura.pdf");

        return "Report successfully generated @path= jasper/jasperOutput/";



    }

public String generateInvoiceFor（预订预订）引发异常{
JasperReport JasperReport=JasperCompileManager.compileReport（“I:\\anoranzaHopefullyFinal\\src\\main\\resources\\jasper\\FacturaFinalFinal.jrxml”）；
List reservations=reservationService.getAll（）；
JRBeanCollectionDataSource JRBeanCollectionDataSource=新的JRBeanCollectionDataSource（保留）；
映射参数=新的HashMap（）；
parameters.put（“Idparam”，reservation.getId（））；
JasperPrint JasperPrint=JasperFillManager.fillReport（jasperReport，参数，jrBeanCollectionDataSource）；
jaspeexportmanager.exportreporttopffile（jasperPrint，“jasper/jasperOutput/Factura.pdf”）；
返回“报告成功生成@path=jasper/jasperOutput/”；
}

检查您的数据源和jasperPrint。如果没有问题，试试这个

JRPdfExporter exporter = new JRPdfExporter();
exporter.setExporterInput(new SimpleExporterInput(jasperPrint));
exporter.setExporterOutput(
  new SimpleOutputStreamExporterOutput("PDF NAME IS HERE.pdf"));

SimplePdfReportConfiguration reportConfig
  = new SimplePdfReportConfiguration();
reportConfig.setSizePageToContent(true);
reportConfig.setForceLineBreakPolicy(false);

SimplePdfExporterConfiguration exportConfig
   = new SimplePdfExporterConfiguration();
exportConfig.setMetadataAuthor("Auth name is here");
exportConfig.setEncrypted(true);
exportConfig.setAllowedPermissionsHint("PRINTING");

exporter.setConfiguration(reportConfig);
exporter.setConfiguration(exportConfig);

exporter.exportReport();