答案1
不含额外软件包:
\documentclass{article}
\usepackage[margin=3cm]{geometry}
\begin{document}
\fboxsep1em
\fboxrule2pt
\noindent\fbox{\begin{minipage}
[c][\dimexpr\textheight-2\fboxsep-2\fboxrule]
[c]{\dimexpr\linewidth-2\fboxsep-2\fboxrule}
Text
\vfill
Text
\vfill
Text
\end{minipage}}
\end{document}
答案2
你可以用 TikZ 覆盖一个矩形(需要运行两次 LaTeX):
\documentclass{article}
\usepackage[margin=3cm]{geometry}
\usepackage{tikz}
\begin{document}
\tikz[overlay, remember picture] \draw ([xshift=3cm,yshift=-3cm]current page.north west) rectangle ([xshift=-3cm,yshift=3cm]current page.south east);
Text
\vfill
Text
\vfill
Text
\end{document}