title: Jackson json only convert selected fields and methods
body: <p>With jackson there is a way to ignore some fields using <code>@JsonIgnore</code>. Is there a way to do the opposite, and only show fields with are annotated? I'm working with an external class with <em>a lot</em> of fields and I only want to select a small subset of them. I'm getting tons of recursion problems (using some type of ORM) where object A -&gt; B -&gt; A -&gt; B -&gt; A .... which are not even necessary to export.</p>