code: public static File file(String path) {
  		if (StrUtil.isBlank(path)) {
  			throw new NullPointerException("File path is blank!");
  		}
  		return new File(getAbsolutePath(path));
  	}
docs: 创建File对象，自动识别相对或绝对路径，相对路径将自动从ClassPath下寻找
  
  @param path 文件路径
  @return File