code: public static boolean isFileExists(Path path) {
  		if (path == null) {
  			return false;
  		}
  		return Files.exists(path) && Files.isRegularFile(path);
  	}
docs: 判断文件是否存在, from Jodd.
  
  @see {@link Files#exists}
  @see {@link Files#isRegularFile}