base64解码转成图片并上传

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在Controller中

 @ResponseBody
   @RequestMapping(value = "/avatarUploadByBase64.json", method = RequestMethod.POST)
   @ApiOperation(value = "头像上传", notes = "头像上传", position = 5)
   public ResponseModel<FileUploadBean> avatarUploadByBase64(HttpServletRequest request,
                                                             @ApiParam(name = "base64", value = "base64字符串") @RequestParam String base64,
                                                             @ApiParam(name = "userId", value = "用户ID") @RequestParam String userId) {


       String sysFilePath = request.getSession().getServletContext().getRealPath("/");
       GenerateImage(base64, sysFilePath + "/" + userId + ".jpg");
       File file = new File(sysFilePath + "/" + userId + ".jpg");
       if (file == null) {
           return new ResponseModel(false, com.hofon.common.domain.BaseResultCode.PARAM_EMPTY.getMsg(), com.hofon.common.domain.BaseResultCode.PARAM_EMPTY.getCode());
       }
       FileUploadBean fileUploadBean = new FileUploadBean();
       try {
//            String filePath = FileUploadUtils.fileUpload(request, file, x, y, width);
           String filePath = FileUploadUtils.fileUpload(file);
           fileUploadBean.setFilePath(filePath);
           fileUploadBean.setUploadTime(new Date());
           file.delete();

           Map<String, Object> params = new HashMap<>();
           params.put("userId", userId);
           params.put("avatar", filePath);
           //healthBaseManager.updateAvatarByUserId(params);

       } catch (IOException e) {
           LOGGER.error("文件上传失败", e);
           return new ResponseModel(false, com.hofon.common.domain.BaseResultCode.SYSTEM_ERROR.getMsg());
       }

       return new ResponseModel(fileUploadBean);
   }
    //    base64 转成图片
    public static boolean GenerateImage(String imgStr, String imgFilePath) {// 对字节数组字符串进行Base64解码并生成图片
        if (imgStr == null) // 图像数据为空
            return false;
        BASE64Decoder decoder = new BASE64Decoder();
        try {
            // Base64解码
            byte[] bytes = decoder.decodeBuffer(imgStr);
            for (int i = 0; i < bytes.length; ++i) {
                if (bytes[i] < 0) {// 调整异常数据
                    bytes[i] += 256;
                }
            }
            // 生成jpeg图片
            OutputStream out = new FileOutputStream(imgFilePath);
            out.write(bytes);
            out.flush();
            out.close();
            return true;
        } catch (Exception e) {
            return false;
        }
    }