我正在尝试编写一个带有小节但不带节号的序言（因为从技术上讲，序言实际上不是报告的一部分）。节和小节是使用 \titleformat 构建的，如下所示：
\titleformat{\section}
{\normalfont\Large\bfseries\filcenter}
{\thesection.}{0.5em}{#1}
[\vspace{3pt}
{\color{\colorstyle}{\titlerule[1.5pt]}}
\vspace{1pt}
\titlerule]
\titlespacing*{\section}
{0em}{2em}{1em}
\titleformat{\subsection}
{\normalfont\bfseries\filcenter}
{}{0pt}
{\textcolor{\colorstyle}{\noindent\Vhrulefill}\hspace{1em}
\thesubsection.
\hspace{0.5em}#1\hspace{1em}\textcolor{\colorstyle}{\Vhrulefill}}
\titlespacing*{\subsection}
{0em}{2em}{0.5em}
但是，\section* 工作正常，没有编号，而 \subsection* 的编号为“0.0 subsectiontitle”，但我不需要任何编号。有人知道为什么会发生这种情况以及如何避免它吗？
工作示例：
\documentclass{article}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Style: Fonts
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{mathptmx}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Style: Colors
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[usenames,dvipsnames]{xcolor}
\newcommand{\colorstyle}[1]{\def\colorstyle{#1}}
\definecolor{mycolor}{RGB}{0,80,158}
\colorstyle{mycolor}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Style: Sections
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[explicit,pagestyles]{titlesec}
\def\Vhrulefill{\leavevmode\leaders\hrule height 0.7ex depth \dimexpr0.4pt
0.7ex\hfill\kern0pt}
\titleformat{\section}
{\normalfont\Large\bfseries\filcenter}
{\thesection.}{0.5em}{#1}
[\vspace{3pt}
{\color{\colorstyle}{\titlerule[1.5pt]}}
\vspace{1pt}
\titlerule]
\titlespacing*{\section}
{0em}{2em}{1em}
\titleformat{\subsection}
{\normalfont\bfseries\filcenter}
{}{0pt}
{\textcolor{\colorstyle}{\noindent\Vhrulefill}\hspace{1em}
\thesubsection.
\hspace{0.5em}#1\hspace{1em}\textcolor{\colorstyle}{\Vhrulefill}}
\titlespacing*{\subsection}
{0em}{2em}{0.5em}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\section*{Section without a number}
Bacon ipsum dolor sit amet pork loin leberkas turducken.
\subsection*{Subsection behaving oddly}
Beef pork belly porchetta turducken, bresaola venison boudin doner.
\end{document}
答案1
使用以下numberless功能：
\documentclass{article}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Style: Fonts
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{mathptmx}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Style: Colors
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[usenames,dvipsnames]{xcolor}
\newcommand{\colorstyle}[1]{\def\colorstyle{#1}}
\definecolor{mycolor}{RGB}{0,80,158}
\colorstyle{mycolor}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Style: Sections
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[explicit,pagestyles]{titlesec}
\def\Vhrulefill{\leavevmode\leaders\hrule height 0.7ex depth \dimexpr0.4pt-0.7ex\hfill\kern0pt}
\titleformat{\section}
{\normalfont\Large\bfseries\filcenter}
{\thesection.}
{0.5em}
{#1}
[\vspace{3pt}%
{\color{\colorstyle}{\titlerule[1.5pt]}}
\vspace{1pt}
\titlerule]
\titlespacing*{\section}
{0em}
{2em}
{1em}
\titleformat{\subsection}
{\normalfont\bfseries\filcenter}
{}
{0pt}
{\textcolor{\colorstyle}{\noindent\Vhrulefill}%
\hspace{1em}\thesubsection.\hspace{0.5em}#1\hspace{1em}%
\textcolor{\colorstyle}{\Vhrulefill}}
\titleformat{name=\subsection,numberless}
{\normalfont\bfseries\filcenter}
{}
{0pt}
{\textcolor{\colorstyle}{\noindent\Vhrulefill}%
\hspace{1em}#1\hspace{1em}%
\textcolor{\colorstyle}{\Vhrulefill}}
\titlespacing*{\subsection}
{0em}
{2em}
{0.5em}
\begin{document}
\section{Abc def ghi}
\subsection{Abc def ghi}
\section*{Abc def ghi}
\subsection*{Abc def ghi}
\end{document}
