title: Java POJO JSON ignore default field annotation
body: <p>How can I seperate a JSON field that gets actually set to int value 0 versus set to 0 by default?
  I want to see the json field with actual value: '0',
  but ignore it when its not set at all (but still ends up as 0).</p>
  <p>I am currently testing this on my int field variable:</p>
  <pre><code>@JsonInclude(JsonInclude.Include.NON_DEFAULT)
  </code></pre>
  <p>but it ignores every 0 value for that field in my json.</p>