通过JSF发送PDF到浏览器 [英] Send a PDF to browser via JSF

问题描述

我正在尝试发送一个JasperReports生成的PDF文件到用户的浏览器，我找不到我的托管bean方法有什么问题，这里是一个代码片段：

I am trying to send a JasperReports generated PDF file to user's browser, I can't find what's wrong in my managed bean method, here's a snippet:

System.out.println("Making pdf...");

        FacesContext fc = FacesContext.getCurrentInstance();
        ExternalContext ec = fc.getExternalContext();
        String tplPath = ec.getRealPath("testTemplate.jrxml");
        JasperReport jasperReport = JasperCompileManager.compileReport(tplPath);
        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, new HashMap<String,Object>(), ds );

        String pdfName = "/testReport.pdf";
        String pdfPath = ec.getRealPath(pdfName);
        JasperExportManager.exportReportToPdfFile(jasperPrint, pdfPath);

        System.out.println("PDF ready!");

        ec.responseReset(); 
        ec.setResponseContentType(ec.getMimeType(pdfPath)); 
        //ec.setResponseContentLength(contentLength); 
        ec.setResponseHeader("Content-Disposition", "attachment; filename=\"" + pdfName + "\""); 

        InputStream input = new FileInputStream(pdfPath);
        OutputStream output = ec.getResponseOutputStream();
        IOUtils.copy(input, output);

        System.out.println("Sending to browser...");

        fc.responseComplete();  

简单的用户点击：

<p:menuitem value="TestPDF" action="#{menuController.getTestPdf()}" />

我觉得这很容易找到。为什么我看不到它？ ：

I feel like it's something easy to find out. Why can't I see it? :)

推荐答案

默认情况下< p：menuitem> 阿贾克斯。您不能通过ajax下载文件。 JavaScript具有安全原因，没有任何设施以编程方式强制使用另存为对话与变量中的任意内容。

The <p:menuitem> uses by default ajax. You can't download files by ajax. JavaScript has due security reasons no facilities to programmatically force a Save As dialogue with arbitrary content in a variable.

只需关闭ajax。 p>

Just turn off ajax.

<p:menuitem ... ajax="false" />

另请参见：

• 如何从JSF备份bean提供文件下载？



See also:

• How to provide a file download from a JSF backing bean?

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