title: jackson Unrecognized field
body: <p>I use jackson for converting JSON to Object class.</p>
  
  <p>JSON:</p>
  
  <pre><code>{
      "aaa":"111",
      "bbb":"222", 
      "ccc":"333" 
  }
  </code></pre>
  
  <p>Object Class:</p>
  
  <pre><code>class Test{
      public String aaa;
      public String bbb;
  }
  </code></pre>
  
  <p>Code:</p>
  
  <pre><code>ObjectMapper mapper = new ObjectMapper();
  Object obj = mapper.readValue(content, valueType);
  </code></pre>
  
  <p>My code throws exception like that:</p>
  
  <pre><code>org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "cccc" (Class com.isoftstone.banggo.net.result.GetGoodsInfoResult), not marked as ignorable
  </code></pre>
  
  <p>And I don't want to add a prop to class Test,I just want jackson convert the exist value whith is also exist in Test.</p>