Insert code into a latex doc. without leading tabs

Question

When I write latex I usually indent my sections like this (it allows easier folding in vim, is like reading code, etc).

section{section}

    bla bla bla bla bla

    subsection{a}

        bla bla bla bla bla

    subsection{b}

        bla bla bla bla bla

The problem is when I insert code (see below) into my document if I indent the all of the code 3 tabs it will be be indented 3 tabs in the document. I want to preserve the relative indenting but I don't want that extra three tabs of indentation.

For example this latex:

    subsection{a}

        bla bla bla bla bla
    \begin{lstlisting}
    public static void main(String [] args){
        bla bla
    }
    \end{lstlisting}

Produces:

*a*

bla bla bla bla bla
            /* code is indented 3 tabs */
        public static void main(String [] args){
            bla bla
        }

I would like it to produce:

*a*

bla bla bla bla bla
public static void main(String [] args){
    bla bla
}

This is the code that is responsible for the code formatting (thanks Cloudanger).

    \usepackage{listings}
    \usepackage{color}

    \definecolor{dkgreen}{rgb}{0,0.6,0}
    \definecolor{gray}{rgb}{0.5,0.5,0.5}
    \definecolor{mauve}{rgb}{0.58,0,0.82}

    \lstset{frame=tb,
      language=Java,
      aboveskip=3mm,
      belowskip=3mm,
      showstringspaces=false,
      columns=flexible,
      basicstyle={\small\ttfamily},
      numbers=none,
      numberstyle=\tiny\color{gray},
      keywordstyle=\color{blue},
      commentstyle=\color{dkgreen},
      stringstyle=\color{mauve},
      breakatwhitespace=true
      tabsize=3
    }

Answer 1

Not a very good solution (automatical would be ideal), but this works:

Use gobble-setting to remove characters from start.

Example

Remove two tabs (= 8 spaces) from start:

\begin{lstlisting}[gobble=8]

Answer 2

What do you mean by "it allows easier folding in Vim"? Are you writing LaTeX and using indents to get your folding in Vim? That seems like less than optimal approach.

A better approach would be to use the Vim LaTeX-Suite plugin, which gives you automatic folding of sections regardless of how they're indented. Plus it has a lot of other benefits. http://vim-latex.sourceforge.net/