title: How to convert object to JSON of an integer field having leading zeros using Jackson?
body: <p>When I try to convert an object having an integer field with value as <code>0000</code>,
  the converted JSON contains <code>0</code> instead of <code>0000</code>.</p>
  
  <p>How can I configure Jackson's <code>ObjectMapper</code> to convert <code>0000</code> to <code>00000</code>?</p>