Question

我在我的应用程序中使用Jasper报告。

步骤是基本步骤，

response.setHeader("Content-Disposition",  "attachment;filename=report.pdf");
response.setContentType("application/pdf");
OutputStream outStream = response.getOutputStream();

InputStream inputStream = new FileInputStream(new File(this.template)); // .jrxml file      
JRBeanCollectionDataSource beanColDataSource = new JRBeanCollectionDataSource(this.dataList);
JasperDesign jasperDesign = JRXmlLoader.load(inputStream);
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, beanColDataSource);

JasperExportManager.exportReportToPdfStream(jasperPrint,outStream );
JasperExportManager.exportReportToPdfFile(jasperPrint,"/test.pdf");// this works in any case

我在HTML页面中提交了表单。

<form action="{{vm.downloadUrl}}"
  id="downloadPdf" name="downloadPdf"
  method="post"></form>

js是，（这将下载pdf没有问题）

vm.downloadUrl = appConfig.baseUrl+'/generateReport2?data='+data;
document.getElementById('downloadPdf').action = vm.downloadUrl;
document.downloadPdf.submit(); // document.form_name.submit();

但是，当我使用下面的代码时，它将下载一个空的pdf，尽管PDF创建并从JasperExportManager.exportReportToPdfFile(jasperPrint,"/test.pdf");

保存到本地磁盘

$http.post(vm.downloadUrl)
            .success(function (response) {
                console.log('response received :');
                console.log(response);

                var file = new Blob([response], { type: 'application/pdf' });
                saveAs(file, 'filename.pdf'); 

            });

这里有什么问题。为什么要下载空文件。我之前遇到过类似的问题，现在通过在jrxml文件中设置whenNoDataType="AllSectionsNoDetail"来处理它。

使用$ http.post无效的Jasper报告下载

0 个答案: