从Spring Controller获取Web App根目录

本文介绍了从Spring Controller获取Web App根目录的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我试图把一个上传的多部分文件写入文件系统。我有一个名为音频的目录，位于我的Web应用程序的根目录（不在WEB-INF内部，但在其旁边，可公开访问，如css和javascript）。

我想将上传的文件写入该目录，但似乎无法获得所需的路径。我以为得到一个ServletContext（）然后使用realPath（）可能工作，但我没有通过Spring控制器的ServletContext的引用。感谢任何hep @RequestMapping（value =/ uploadSample） public ModelAndView上传（HttpServletRequest请求，HttpServletResponse响应，@RequestParam（文件）MultipartFile f）{ if（f == null）{返回新的ModelAndView（upload，msg，文件为空。）; try { //我需要将AUDIO_PATH设置为< webAppRoot> / audio FileOutputStream file = new FileOutputStream（AUDIO_PATH +/+ f.getOriginalFilename（） ）; file.write（f.getBytes（））; file.close（）; catch（FileNotFoundException ex）{ Logger.getLogger（SampleUploadController.class.getName（））.log（Level.SEVERE，null，ex）; catch（IOException ex）{ Logger.getLogger（SampleUploadController.class.getName（））.log（Level.SEVERE，null，ex）; } 成功上传新的ModelAndView（upload，msg，File（+ f.getOriginalFilename（）+）。 ）; $ / code>

}

解决方案

我以为得到一个ServletContext（）然后使用realPath（）可能工作，但我没有引用 ServletContext

是的。请参阅 HttpServletRequest.getSession（ ）.getServletContext（）

I am trying to write an uploaded multipart file to the filesystem. I have a directory called audio which sits in the root of my web application (not inside WEB-INF, but beside it, to it's publicly accessible like css and javascript).

I want to write the uploaded file to that directory but I can't seem to get the path I need. I thought getting a ServletContext() then using realPath() may work, but I don't have a reference to ServletContext through a Spring controller. Thanks for any hep

@RequestMapping(value="/uploadSample") public ModelAndView upload(HttpServletRequest request, HttpServletResponse response, @RequestParam("file") MultipartFile f) { if (f == null) { return new ModelAndView("upload", "msg", "The file is null."); } try { // I need to set AUDIO_PATH to <webAppRoot>/audio FileOutputStream file = new FileOutputStream(AUDIO_PATH + "/" + f.getOriginalFilename()); file.write(f.getBytes()); file.close(); } catch (FileNotFoundException ex) { Logger.getLogger(SampleUploadController.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(SampleUploadController.class.getName()).log(Level.SEVERE, null, ex); } return new ModelAndView("upload", "msg", "File ( " + f.getOriginalFilename() + ") successfully uploaded."); }

}

解决方案

I thought getting a ServletContext() then using realPath() may work, but I don't have a reference to ServletContext

Yes you do. See HttpServletRequest.getSession().getServletContext()