从Spring Controller获取Web App根目录 [英] Get Web App root from Spring Controller

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()

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