SpringMVC上传下载

客官°小女子只卖身不卖艺 2022-06-13 07:58 223阅读 0赞

@Controller
    public class UploadController {
        @RequestMapping(value = "/upload",method = RequestMethod.POST)
        public @ResponseBody String upload(MultipartFile file, HttpServletRequest request){
            try {
                String path=request.getServletContext().getRealPath("/images/");
                String filename=file.getOriginalFilename();
                File filepath=new File(path,filename);
                if(!filepath.getParentFile().exists()){
                    filepath.getParentFile().mkdirs();
                }
                System.out.println(path+File.separator+filename);
                FileUtils.writeByteArrayToFile(new File(path+File.separator+filename),file.getBytes());
                return "ok";
            } catch (Exception e) {
                e.printStackTrace();
                return "wrong";
            }
        }
        @RequestMapping(value="/download")
        public ResponseEntity<byte[]> download(HttpServletRequest request, @RequestParam("filename") String filename) throws Exception{
            //下载路径
            String path=request.getServletContext().getRealPath("/images/");
            File file=new File(path+File.separator+filename);
            HttpHeaders headers=new HttpHeaders();
            //下载显示文件名，解决中文名称乱码问题
            String downloadFileName=new String(filename.getBytes("UTF-8"),"iso-8859-1");
            //通知浏览器以attachment（下载方式)打开图片
            headers.setContentDispositionFormData("attachment",downloadFileName);
            //二进制流数据(最常见的文件下载)
            headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
            return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),headers, HttpStatus.CREATED);
        }
    }