我正在嘗試構建一個示例 Web 應用程序，它加載通過 jasper 報告（.jasper 文件）生成的 pdf 報告。但是，該報告不會以 pdf 格式打開并顯示消息“此 PDF 文檔可能無法正確顯示”。代碼片段如下。服務器日志中沒有異常日志。任何幫助都會很棒。謝謝。Servlet 控制器類@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頁面<form action="/samplejasperreport/generateReport" method="get"><div><input type="submit" name="Generate Report" value="Generate Report"></div></form>目錄結構圖錯誤畫面：