docs: public static SocketAddress getRemoteAddress(AsynchronousSocketChannel channel) {
  		try {
  			return (null == channel) ? null : channel.getRemoteAddress();
  		} catch (ClosedChannelException e) {
  			// Channel未打开或已关闭，返回null表示未连接
  			return null;
  		} catch (IOException e) {
  			throw new IORuntimeException(e);
  		}
  	}