code: public static byte[] readBytes(InputStream in) throws IORuntimeException {
  		final FastByteArrayOutputStream out = new FastByteArrayOutputStream();
  		copy(in, out);
  		return out.toByteArray();
  	}
docs: 从流中读取bytes
  
  @param in {@link InputStream}
  @return bytes
  @throws IORuntimeException IO异常