title: Get single field from JSON using Jackson
body: <p>Given an arbitrary JSON I would like to get value of a single field <code>contentType</code>. How to do it with <strong>Jackson</strong>?</p>
  
  <pre><code>{
    contentType: "foo",
    fooField1: ...
  }
  
  {
    contentType: "bar",
    barArray: [...]
  }
  </code></pre>
  
  <p><strong>Related</strong></p>
  
  <ul>
  <li><a href="https://stackoverflow.com/questions/6153176/how-to-find-specified-name-and-its-value-in-json-string-from-java">How to find specified name and its value in JSON-string from Java?</a> (GSON)</li>
  <li><a href="https://stackoverflow.com/questions/11428329/using-gson-to-deserialize-specific-json-field-of-an-object">Using gson to deserialize specific JSON field of an object</a> (GSON)</li>
  </ul>