code: private static void addDir(String path, ZipOutputStream out) throws UtilException {
  		path = StrUtil.addSuffixIfNot(path, StrUtil.SLASH);
  		try {
  			out.putNextEntry(new ZipEntry(path));
  		} catch (IOException e) {
  			throw new UtilException(e);
  		} finally {
  			closeEntry(out);
  		}
  	}
docs: 在压缩包中新建目录
  
  @param path 压缩的路径
  @param out 压缩文件存储对象
  @throws UtilException IO异常