如何为 Jasper 报告下载设置名称？

Question

我在jasper中声明了一个bean-view.xml如下

<bean id="resultsPdf"
      class="org.springframework.web.servlet.view.jasperreports.JasperReportsPdfView"
      p:url="classpath:reports/resultsPdfFormat.jrxml"
      p:reportDataKey="datasource">
    <property name="headers">
        <props>
            <prop key="Content-Disposition">
                attachment; filename=results.pdf
            </prop>
        </props>
    </property>
</bean>

控制器中的方法如下

@RequestMapping(value = "/results-pdf", method = RequestMethod.GET)
@ResponseBody
public ModelAndView generateResultsPdf(@RequestParam("year") String year) {

    List<Student> studentList = studentService.getResultsByYear(year);
    JRDataSource jrDataSource = new JRBeanCollectionDataSource(studentList);
    Map<String, Object> parameterMap = new HashMap<>();
    parameterMap.put("title", "Results table"));
    parameterMap.put("datasource", jrDataSource);

    return new ModelAndView("resultsPdf", parameterMap);
}

目前一切正常。下载文件的名称是

results.pdf

现在我想将年份参数附加到文件名，这样它就可以读作

results_YEAR.pdf

有什么想法吗？提前致谢。

Answer 1

我想出了解决这个问题的方法。我们可以通过更改 generateResultsPdf 方法

来完成任务，而不是声明一个 bean

@RequestMapping(value = "/results-pdf", method = RequestMethod.GET)
@ResponseBody
public void generateResultsPdf(@RequestParam("year") String year, HttpServletResponse response) {

    List<Student> studentList = studentService.getResultsByYear(year);
    JRDataSource jrDataSource = new JRBeanCollectionDataSource(studentList);
    Map<String, Object> parameterMap = new HashMap<>();
    parameterMap.put("title", "Results table"));
    parameterMap.put("datasource", jrDataSource);

    try {
            JasperReport jasperReport = JasperCompileManager.compileReport(RESULTS_PDF_REPORT_PATH);
            JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameterMap, jrDataSource);

            String filename = "new-filename.pdf";

            response.setContentType("application/pdf");
            response.addHeader("Content-disposition", "attachment; filename=" +filename);
            OutputStream outputStream = response.getOutputStream();

            JasperExportManager.exportReportToPdfStream(jasperPrint, outputStream);
        } catch (JRException | IOException e) {
            logger.error("Error in generating pdf : {}", e);
        }
}

如何为 Jasper 报告下载设置名称？

How to set a name for the Jasper report download?

java

servlets

spring-mvc

jasper-reports