Question

我想将报告导出为pdf，它应该询问用户下载位置。我怎么用grails做到这一点？

这是我的代码：

def exportToPdf(JasperPrint jasperPrint,String path,request){

    String cur_time =System.currentTimeMillis();
    JRExporter pdfExporter = null;

    pdfExporter = new JRPdfExporter();

    log.debug("exporting to file..."+JasperExportManager.exportReportToPdfFile(jasperPrint, "C:\\pdfReport"+cur_time+".pdf"));

    return ;
}

在碧玉控制器中：

/**
   * Generate a html response.
   */
  def generateResponse = {reportDef ->
    if (!reportDef.fileFormat.inline && !reportDef.parameters._inline) {
      response.setHeader("Content-disposition", "attachment; filename=\"" + reportDef.name + "." + reportDef.fileFormat.extension + "\"");
      response.contentType = reportDef.fileFormat.mimeTyp
      response.characterEncoding = "UTF-8"
      response.outputStream << reportDef.contentStream.toByteArray()
    } else {
      render(text: reportDef.contentStream, contentType: reportDef.fileFormat.mimeTyp, encoding: reportDef.parameters.encoding ? reportDef.parameters.encoding : 'UTF-8');
    }
  }

Answer 1

您是否看过Jasper Plugin?它似乎已经为您构建了工具。至于询问用户下载位置，浏览器具有一些控制器，而不是如何从网页接收文件。您想要控制下载位置的真正问题吗？

[UPDATE]

使用位置“c：\”位于您的服务器上不客户端，这就是它未下载的原因。

尝试这样的事情......

def controllerMethod = {
    def temp_file = File.createTempFile("jasperReport",".pdf") //<-- you don't have to use a temp file but don't forget to delete them off the server at some point.

    JasperExportManager.exportReportToPdfFile(jasperPrint, temp_file.absolutePath));

    response.setContentType("application/pdf")  //<-- you'll have to handle this dynamically at some point
    response.setHeader("Content-disposition", "attachment;filename=${temp_file.getName()}")
    response.outputStream << temp_file.newInputStream() //<-- binary stream copy to client



}

我没有对此进行测试，并且有更好的方法来处理文件和流，但我认为你会得到一般的想法。

如何在jasper报告中导出pdf报告

1 个答案: