文件上传 下载

文件上传

controller

 1     public Object updateHeadPortrait(@RequestParam(value = "file") MultipartFile file, HttpServletRequest request) throws Exception{
 2         SysUser sysUser = userUtil.getSysUser(request);
 3         // 判断文件类型
 4         int fileType = FileTypeUtil.checkFileType(file);
 5         if (1 == fileType) {
 6             // 文件为空
 7             return RestResponse.buildError(ReturnCode.file_is_null);
 8         }
 9         String fileTypes = file.getOriginalFilename().substring(file.getOriginalFilename().indexOf("."),file.getOriginalFilename().length());
10         if(!(".png").equals(fileTypes)&&!(".jpg").equals(fileTypes)){
11             return RestResponse.buildError(ReturnCode.file_type_error);
12         }
//上传文件
13         Map map = commonService.uploadImage(file);
14 15         return RestResponse.buildSuccess();
16     }

 

impl

 1  public Map uploadImage(MultipartFile file) throws Exception {
 2         String tempPath = format.format(new Date()); //定义文件名
 3         File tempFile = new File(filePath+File.separator+tempPath);
 4         if(!tempFile.exists()){
 5             tempFile.mkdirs();
 6         }
 7         String fileType = file.getOriginalFilename().substring(file.getOriginalFilename().indexOf("."),file.getOriginalFilename().length());//获取文件类型
 8         String filePaths = tempPath+"/"+ UUIDUtil.getUUID()+fileType; //文件保存位置
 9         File f = new File(filePath+File.separator+filePaths);
10         file.transferTo(f);
11         Map map = new HashMap();
12         map.put("path",filePaths);
13         return map;
14     }

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();
        }
    }

 

posted on 2020-05-16 18:28  好名字被谁用了  阅读(169)  评论(0)  编辑  收藏  举报

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