Question

我正在使用spring boot 2.我的新任务是文件上传。我已经做到了。但我被要求这样做而不向控制器方法添加额外的参数，如@RequestParam（＆＃34;文件＆＃34;）MultipartFile文件[]。我希望从请求中获取此信息，而不是添加此参数。

我该如何解决这个问题？

我正在添加我当前的代码。

@RequestMapping(value="/uploadMultipleFiles", method=RequestMethod.POST)
    public @ResponseBody String handleFileUpload( @RequestParam("files") MultipartFile files[]){
            try {
                String filePath="c:/temp/kk/";
                StringBuffer result=new StringBuffer();
                byte[] bytes=null;
                result.append("Uploading of File(s) ");

                for (int i=0;i<files.length;i++) {
                    if (!files[i].isEmpty()) {
                        bytes = files[i].getBytes();
                        BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(new File(filePath+files[i].getOriginalFilename())));
                        stream.write(bytes);
                        stream.close();

                       result.append(files[i].getOriginalFilename() + " Ok. ") ;
                    }
                    else
                        result.append( files[i].getOriginalFilename() + " Failed. ");

            }
                return result.toString();

            } catch (Exception e) {
                return "Error Occured while uploading files." + " => " + e.getMessage();
            }

    }

Answer 1

您可以从HttpRequest获取文件：

@RequestMapping(value="/uploadMultipleFiles", method=RequestMethod.POST)
    public String handleFileUpload(HttpRequest request){

        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;

       Map<String, MultipartFile> yourFiles = multipartRequest.getFileMap();

        return "All is Ok!";
    }

Answer 2

我的示例代码。

@RequestMapping(value = "/multiple/upload", method = RequestMethod.POST)
public @ResponseBody String test(@RequestParam(value = "files[]") List<MultipartFile> files,
        HttpServletRequest req) {

    MultipartFileWriter writer = new MultipartFileWriter();
    String folderPath = "/file/";

    for (MultipartFile file : files) {
        writer.writeFile(file, folderPath, req);
    }

    return "success";
}

使用Spring MVC上传文件而不在控制器方法中添加任何其他参数

2 个答案: