SpringBoot多文件上传，文件下载

SpringBoot多文件上传

一、文件上传

@PostMapping("/fileUpload")
    public ResponseTemplate handleFormUploadFile(@RequestParam("uploadfile") List<MultipartFile> uploadfile,
                                                 HttpServletRequest request) {
        if (!uploadfile.isEmpty() && uploadfile.size() > 0) {

            for (MultipartFile file : uploadfile) {

                String dirPath = System.getProperty("user.dir")+"/src/main/resources/images/voice/";

                String name = file.getOriginalFilename();

                File filePath = new File(dirPath);

                if (!filePath.exists()) {
                    filePath.mkdirs();
                }
                System.out.println(filePath);
                try {
                    System.out.println(file.getSize());
                    file.transferTo(new File(dirPath + name));

                } catch (Exception e) {
                    e.printStackTrace();
                    return ResFailTemplate.builder().message(e.toString()).build();
                }
            }
        } else {
            return ResFailTemplate.builder().message("not file").build();
        }

        return ResSuccessTemplate.builder().build();
    }

  

 

  
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二、上传限制

application.properties

#文件上传大小
spring.servlet.multipart.max-file-size=200MB
spring.servlet.multipart.max-request-size=300MB

  

 

  
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三、文件下载

 <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.5</version>
        </dependency>

  

 

  
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   @RequestMapping("/download")
    public ResponseEntity<byte[]> fileDownload(String filename, HttpServletRequest request) throws Exception {
        System.out.println(filename);
        String path = System.getProperty("user.dir")+"/src/main/resources/images/upload/";
//        String path = request.getServletContext().getRealPath("/upload/");
        System.out.println(path);
        File file = new File(path+File.separator+filename);
//        filename = FileType.getFilename(request, filename);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentDispositionFormData("attachment", filename);
        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
        return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),
                headers, HttpStatus.OK);
    }

  

 

  
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文章来源: blog.csdn.net，作者：小毕超，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/qq_43692950/article/details/107443354