【Java】【SpringBoot】基于BASE64的图片上传、存储

前台

上传控件：

JS提交：

//保存图片信息
      $scope.save = function () {
        var fd = new FormData();
        var file = document.getElementById('homeImg').files[0];
        fd.append('homeImg', file);

        $http.post(CommonConfig.RestBaseUrl.CaoBaoService + 'homeimgs/upload?id=' + $scope.detailInfo.id + '&sortNum=' + $scope.detailInfo.sortNum, fd, CommonConfig.fileUploadReqConfig)
          .then(function (result) {  //正确请求成功时处理
            console.log('save:result', result);

            if (result.data.code == 'NONE_ERROR') {
              $scope.modalContent = '保存成功！';
              $('#myModal').modal('show');

              $scope.getHomeImgs($scope.detailInfo.id);

              $scope.resetDetailInfo();
            }
            else {
              $scope.modalContent = '保存失败！';
              $('#myModal').modal('show');
            }
          }).catch(function (result) { //捕捉错误处理
            console.log(result);
          });
      };

请求参数设置：

CommonConfig. fileUploadReqConfig = {

headers: { 'Content-Type' : undefined },

transformRequest: angular. identity

};

前台展示：

< img src= "data:image/png;base64,{{viewImgData}}" width= "100%" height= "100%" alt= "无法显示" />

后台

后台Model中用String存储即可。

数据库采用MediumBlob类型。

后台Rest请求处理：

import org.apache.commons.codec.binary.Base64;

@PostMapping(value = "/upload")
    public RestRsp<String> upload(HttpServletRequest request, @RequestParam @Nullable int sortNum, @RequestParam @Nullable String id)
    {
        RestRsp<String> result = new RestRsp<String>();
        HomeImgsMO mo = null;

        try
        {
            List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("homeImg");

            if (StringUtil.isNotEmpty(id))
            {
                mo = homeImgsBusiness.getById(id);
                mo.setSortNum(sortNum);

                if (CollectionUtil.isNotEmpty(files))
                {
                    mo.setImgData(Base64.encodeBase64String(files.get(0).getBytes()));
                }

                homeImgsBusiness.modify(mo);
            }
            else
            {
                if (CollectionUtil.isEmpty(files))
                {
                    throw new LittleCatException("upload home img:img is null.");
                }

                mo = new HomeImgsMO();
                mo.setSortNum(sortNum);
                mo.setImgData(Base64.encodeBase64String(files.get(0).getBytes()));

                result.getData().add(homeImgsBusiness.add(mo));
            }
        }
        catch (LittleCatException e)
        {
            result.setCode(e.getErrorCode());
            result.setMessage(e.getMessage());
            logger.error(e.getMessage(), e);
        }
        catch (Exception e)
        {
            result.setCode(Consts.ERROR_CODE_UNKNOW);
            result.setMessage(e.getMessage());
            logger.error(e.getMessage(), e);
        }

        return result;
    }