java 后台接受base64 转MultipartFile

tips:资源文件太大，采用base64  压缩图片

	public class Base64StrToImage {

        Logger logger = LoggerFactory.getLogger(Base64StrToImage.class);
        public  static MultipartFile base64MutipartFile(String imgStr){
            try {
                String [] baseStr = imgStr.split(",");
                BASE64Decoder base64Decoder = new BASE64Decoder();
                byte[] b =  new byte[0];
                b = base64Decoder.decodeBuffer(baseStr[1]);
                for(int i = 0; i < b.length; ++i) {
                    if (b[i] < 0) {
                        b[i] += 256;
                    }
                }
                return  new BASE64DecodedMultipartFile(b,baseStr[0]) ;
            }catch (Exception e){
                e.printStackTrace();
                return null;
            }
        }
}

 @RequestParam(required = false, value = "fileStr") String fileStr  // 接收base64值（请求参数）；

  try {
            Base64DecodedMultipartFile base64DecodedMultipartFile = null;
            if(null != fileStr && !fileStr.isEmpty()){
               base64DecodedMultipartFile =  (Base64DecodedMultipartFile) Base64StrToImage.base64MutipartFile(fileStr);  
            }
           List<String> stringList = null;
            if (null !=base64DecodedMultipartFile && !base64DecodedMultipartFile.equals("")){
                FileUploading fileUploading = new FileUploading();
                stringList= fileUploading.phtoUpload(base64DecodedMultipartFile, request);
            }
            customerService.saveCustomer(customer, payments,stringList);
            //TODO 手机短信验证码，和第三方对接
            return AjaxResult.successState("注册成功", 0, "");
        } catch (Exception ex) {
            return AjaxResult.error(ex.getMessage());
        }