lstlisting label with wrong counting across sections [duplicate]

Question

All my listings labels appear with prefix 1. in all sections, such as the following example, where the second listing of my paper in section 2 appears with the prefix 1. rather than 2.

I have already realized that \maketitle is the root of this behavior. If I remove \maketitle the labels appear correctly with 1 and 2, rather than 1.1 and 1.2.

How can we keep consistent numbering with the following llncs template:

\documentclass[runningheads]{llncs}

\usepackage{listings}

\begin{document}

\title{PetClinic Sample}

\maketitle

\section{Intro}
\label{sec:alternatives}

We will use the PetClinic Spring~\ref{lst:input}

\begin{lstlisting}[language={HTML}, caption={Button}, label={lst:button} ]    
<button></button>
\end{lstlisting}

\section{Idioms}

\begin{lstlisting}[language={HTML},caption={Input},label={lst:input}]    
<input>
\end{lstlisting}


\end{document}

Answer 1

As your class sets up a chapter counter listings uses it. You can switch to section like this:

\documentclass[runningheads]{llncs}

\usepackage{listings}
\AtBeginDocument{\counterwithin{lstlisting}{section}%
             \renewcommand\thelstlisting{\thesection.\arabic{lstlisting}}}

\begin{document}

\title{PetClinic Sample}

\maketitle

\section{Intro}
\label{sec:alternatives}

We will use the PetClinic Spring~\ref{lst:input}

\begin{lstlisting}[language={HTML}, caption={Button}, label={lst:button} ]
<button></button>
\end{lstlisting}

\section{Idioms}

\begin{lstlisting}[language={HTML},caption={Input},label={lst:input}]
<input>
\end{lstlisting}


\end{document}