Jasper Report PDF 打不开

Question

我正在尝试构建一个示例 Web 应用程序，它加载通过 jasper 报告（.jasper 文件）生成的 pdf 报告。但是，该报告不会以 pdf 格式打开并显示消息“此 PDF 文档可能无法正确显示”。代码片段如下。服务器日志中没有异常日志。任何帮助都会很棒。谢谢。Servlet 控制器类@WebServlet("/generateReport")public class JasperReportsExample extends HttpServlet{    final String deviceJasper = "SampleReport.jasper";    protected void doGet(HttpServletRequest request, HttpServletResponse response)            throws IOException, ServletException {    response.setContentType("application/pdf");    response.setCharacterEncoding("UTF-8");    try{    List<SampleReportBean> sampleReportBeanList = new ArrayList<SampleReportBean>();    SampleReportBean bean = new SampleReportBean();    bean.setName("Hello");    sampleReportBeanList.add(bean);    InputStream is = this.getClass().getClassLoader().getResourceAsStream(deviceJasper);    JasperReport jasperReport = (JasperReport) JRLoader.loadObject(is);    JRBeanCollectionDataSource beanCollectionDataSource = new JRBeanCollectionDataSource(sampleReportBeanList);    Map<String, Object> parameters = new HashMap<String, Object>();    JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, beanCollectionDataSource);    JasperExportManager.exportReportToPdfFile(jasperPrint, deviceJasper);    }catch(Exception e) {        System.out.println("Error:while creating jasper report....");        e.printStackTrace();    }    }}html页面<form action="/samplejasperreport/generateReport" method="get"><div><input type="submit" name="Generate Report" value="Generate Report"></div></form>目录结构图错误画面：

Answer 1

感谢 AlexK：

JasperExportManager.exportReportToPdfStream(jasperPrint, response.getOutputStream());//send the pdfstream to the browser