FileValidator.java 文件源码

public void validate(Object obj, Errors errors) {

        FileUpload fileUploadModel = (FileUpload) obj;
        MultipartFile file = fileUploadModel.getFile();
        if(file.isEmpty()){
            errors.rejectValue("file", "upload.file.required");
        }
        else if(!PNG_MIME_TYPE_PNG.equalsIgnoreCase(file.getContentType()) && !PNG_MIME_TYPE_JPEG.equalsIgnoreCase(file.getContentType())){
            errors.rejectValue("file", "upload.invalid.file.type");
        }

        else if(file.getSize() > A_MB_IN_BYTES){
            errors.rejectValue("file", "upload.exceeded.file.size");
        }

    }