若依加密上传下载文件

加密导出

    /**
     * 导出问卷管理列表
     */
    @RequiresPermissions("develop:psq:export")
    @Log(title = "问卷管理", businessType = BusinessType.EXPORT)
    @PostMapping("/export")
    @ResponseBody
    public AjaxResult export(Integer pass, Psq psq) throws IOException {
        List<Psq> list = psqService.selectPsqList(psq);
        ExcelUtil<Psq> util = new ExcelUtil<Psq>(Psq.class);
        AjaxResult ajax = util.exportExcel(list, "问卷管理数据");
        System.out.println(getAbsoluteFile(ajax.get("msg").toString()));
        FileInputStream fis = new FileInputStream(getAbsoluteFile(ajax.get("msg").toString()));
        int b;
        List<Integer> bs = new ArrayList<>();
        while ((b = fis.read()) != -1) {
            bs.add(b ^ pass);
        }
        FileOutputStream fos = new FileOutputStream(getAbsoluteFile(ajax.get("msg").toString()));
        for (int b1:bs) {
            fos.write(b1);
        }
        IOUtils.closeQuietly(fis);
        IOUtils.closeQuietly(fos);
        System.out.println(ajax);
        return ajax;
    }

解密导入

    /**
     * 导入文件进来（上传文件的方法）
     */
    @Log(title = "用户管理", businessType = BusinessType.IMPORT)
    @PostMapping("/importData")
    @ResponseBody
    public AjaxResult importData(MultipartFile file, Integer pass, boolean updateSupport) throws Exception {
        FileInputStream fis = new FileInputStream(new File(file.getOriginalFilename()));
        FileOutputStream fos = new FileOutputStream(getAbsoluteFile(file.getOriginalFilename())); //getAbsoluteFile(file.getOriginalFilename())是路径加名称
        int b;
        List<Integer> bs = new ArrayList<>();
        while ((b = fis.read()) != -1) {
            fos.write(b ^ pass);
        }
        File files = new File(getAbsoluteFile(file.getOriginalFilename()));
        FileInputStream input = new FileInputStream(files);
        ExcelUtil<Psq> util = new ExcelUtil<Psq>(Psq.class);
        file = new MockMultipartFile(file.getName(), input);
        List<Psq> drugFolupList = util.importExcel(file.getInputStream());
        String message = psqService.imporetDrugFolup(drugFolupList, updateSupport, getLoginName());
        return AjaxResult.success(message);
    }