文件上传 下载

文件上传

controller

    public Object updateHeadPortrait(@RequestParam(value = "file") MultipartFile file, HttpServletRequest request) throws Exception{
        SysUser sysUser = userUtil.getSysUser(request);
        // 判断文件类型
        int fileType = FileTypeUtil.checkFileType(file);
        if (1 == fileType) {
            // 文件为空
            return RestResponse.buildError(ReturnCode.file_is_null);
        }
        String fileTypes = file.getOriginalFilename().substring(file.getOriginalFilename().indexOf("."),file.getOriginalFilename().length());
        if(!(".png").equals(fileTypes)&&!(".jpg").equals(fileTypes)){
            return RestResponse.buildError(ReturnCode.file_type_error);
        }
//上传文件
        Map map = commonService.uploadImage(file);
15         return RestResponse.buildSuccess();
    }

impl

 public Map uploadImage(MultipartFile file) throws Exception {
        String tempPath = format.format(new Date()); //定义文件名
        File tempFile = new File(filePath+File.separator+tempPath);
        if(!tempFile.exists()){
            tempFile.mkdirs();
        }
        String fileType = file.getOriginalFilename().substring(file.getOriginalFilename().indexOf("."),file.getOriginalFilename().length());//获取文件类型
        String filePaths = tempPath+"/"+ UUIDUtil.getUUID()+fileType; //文件保存位置
        File f = new File(filePath+File.separator+filePaths);
        file.transferTo(f);
        Map map = new HashMap();
        map.put("path",filePaths);
        return map;
    }

下载

  @Override
    public void download(DocumentFileDto documentFileDto, HttpServletResponse response) throws Exception {
        ServletOutputStream out = null;
        FileInputStream ips = null;
        try {
            //获取图片存放路径
            String imgPath = filePath + File.separator + documentFileDto.getUrl();  //拼接下载路径
            ips = new FileInputStream(new File(imgPath));
            response.setContentType(documentFileDto.getFileType());
            response.setContentType("application/msexcel;charset=UTF-8");
            response.setHeader("Content-Type", "application/octet-stream");
　　　　　　　//下载时文件名中文乱码问题  配置如下能解决
            response.setHeader("Content-Disposition", "attachment;fileName=" + new String(documentFileDto.getFileName().getBytes(), "iso-8859-1")+documentFileDto.getFileType());
            out = response.getOutputStream();
            //读取文件流
            int len = 0;
            byte[] buffer = new byte[1024 * 10];
            while ((len = ips.read(buffer)) != -1){
                out.write(buffer,0,len);
            }
            out.flush();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            out.close();
            ips.close();
        }
    }