330. LaTeX技巧329：表格标题居左如何实现？

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在没有其他控制命令的时候，我们的表格标题默认位置，如下示例：

\documentclass[12pt,letterpaper]{report}

\newcommand\T{\rule{0pt}{2.6ex}}
\newcommand\B{\rule[-1.2ex]{0pt}{0pt}}

\begin{document}
\setcounter{table}{3}
\begin{table}[h!b!p!]
\caption{Table (default placement of caption)}
\begin{tabular}{lll}
\hline
% \T and \B would not work if it is placed here (needs to go inside cell)
Alphabet Character \T \B & Vowel & Number \\
\hline
A \T & Yes & 1 \\
B & No & 2 \\
C \B & No & 3 \\
\hline
\end{tabular}
\label{table4}
\end{table}
\end{document}

有时，我们需要把表格的标题和表格一起居左，那么可以使用如下代码：

% Example LaTeX document 5
% table with modified placement of caption
\documentclass[12pt,letterpaper]{report}

% These commands can be placed in the preamble (to be a global definition)
% or locally inside the \begin{table}...\end{table} syntax.
\newcommand\T{\rule{0pt}{2.6ex}}
\newcommand\B{\rule[-1.2ex]{0pt}{0pt}}

% Here it is: the code that adjusts justification and spacing around caption.
\makeatletter
% This does spacing around caption.
\setlength{\abovecaptionskip}{6pt} % 0.5cm as an example
\setlength{\belowcaptionskip}{6pt} % 0.5cm as an example
% This does justification (left) of caption.
\long\def\@makecaption#1#2{%
\vskip\abovecaptionskip
\sbox\@tempboxa{#1: #2}%
\ifdim \wd\@tempboxa >\hsize
#1: #2\par
\else
\global \@minipagefalse
\hb@xt@\hsize{\box\@tempboxa\hfil}%
\fi
\vskip\belowcaptionskip}
\makeatother

\begin{document}
\setcounter{table}{4}
\begin{table}[h!b!p!]
\caption{Table (modified placement of caption)}
\begin{tabular}{lll}
\hline
% \T and \B would not work if it is placed here (needs to go inside cell)
Alphabet Character \T \B & Vowel & Number \\
\hline
A \T & Yes & 1 \\
B & No & 2 \\
C \B & No & 3 \\
\hline
\end{tabular}
\label{table5}
\end{table}
\end{document}

也可用
\usepackage[justification=justified,singlelinecheck=off]{caption}
即可，参考http://bbs.chinatex.org/forum.php?mod=redirect&tid=5144&goto=lastpost#lastpost

参见：https://www.msu.edu/~harris41/latex_tablespacing.html