code: private static void addFile(InputStream in, String path, ZipOutputStream out) throws UtilException {
  		if (null == in) {
  			return;
  		}
  		try {
  			out.putNextEntry(new ZipEntry(path));
  			IoUtil.copy(in, out);
  		} catch (IOException e) {
  			throw new UtilException(e);
  		} finally {
  			closeEntry(out);
  		}
  	}
docs: 添加文件流到压缩包，不关闭输入流
  
  @param in 需要压缩的输入流
  @param path 压缩的路径
  @param out 压缩文件存储对象
  @throws UtilException IO异常