java 使用 Spring MVC 返回一个 PDF 文件
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Return a PDF file with Spring MVC
提问by Fernando Pineda
Actually, I have that functionality, I got a frame where I set the URL (ip:port/birt/preview?__report=report.rptdesign&__format=pdf¶meters...) and that frame renders the PDF file.
实际上，我有这个功能，我得到了一个框架，我在其中设置了 URL ( ip:port/birt/preview?__report=report.rptdesign&__format=pdf¶meters...) 并且该框架呈现了 PDF 文件。
But I want that URL hidden...
但我想隐藏那个网址...
I need return a PDF file with Spring MVC but that PDF is generated by another application.
我需要使用 Spring MVC 返回一个 PDF 文件，但该 PDF 是由另一个应用程序生成的。
This means I got another app (Eclipse Birt Engine) that I pass the parameters through of an URL (ip:port/birt/preview?__report=report.rptdesign&__format=pdf¶meters...) and it generates a PDF file, I need from my controller get that PDF and return it with Spring MVC. Could somebody help?
这意味着我有另一个应用程序（Eclipse Birt Engine），我通过 URL ( ip:port/birt/preview?__report=report.rptdesign&__format=pdf¶meters...)传递参数并生成一个 PDF 文件，我需要从我的控制器获取该 PDF 并使用 Spring MVC 返回它。有人可以帮忙吗？
回答by Alan Hay
That would be like the below:
如下所示：
@Controller
@RequestMapping("/generateReport.do")
public class ReportController
@RequestMapping(method = RequestMethod.POST)
public void generateReport(HttpServletResponse response) throws Exception {
byte[] data = //read PDF as byte stream
streamReport(response, data, "my_report.pdf"));
}
protected void streamReport(HttpServletResponse response, byte[] data, String name)
throws IOException {
response.setContentType("application/pdf");
response.setHeader("Content-disposition", "attachment; filename=" + name);
response.setContentLength(data.length);
response.getOutputStream().write(data);
response.getOutputStream().flush();
}
}
回答by cjstehno
PDF content is just bytes so you can just write the PDF content bytes to the HttpResponse output stream.
PDF 内容只是字节，因此您可以将 PDF 内容字节写入 HttpResponse 输出流。
