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  1. PO
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    <p>Here is a basic example on how to use Jackson to serialize deserialize a date from an object </p> <p>public class JacksonSetup {</p> <pre><code>private static class JacksonSerializer { private static JacksonSerializer instance; private JacksonSerializer() { } public static JacksonSerializer getInstance() { if (instance == null) instance = new JacksonSerializer(); return instance; } public &lt;E extends ModelObject&gt; void writeTo(E object, Class&lt;E&gt; type, OutputStream out) throws IOException { ObjectMapper mapper = getMapper(); mapper.writeValue(out, object); } public &lt;E extends ModelObject&gt; void writeTo(E object, Class&lt;E&gt; type, Writer out) throws IOException { ObjectMapper mapper = getMapper(); mapper.writeValue(out, object); } public &lt;E extends ModelObject&gt; E read(String input, Class&lt;E&gt; type) throws IOException { ObjectMapper mapper = getMapper(); E result = (E) mapper.readValue(input, type); return result; } private ObjectMapper getMapper() { ObjectMapper mapper = new ObjectMapper(); mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); AnnotationIntrospector introspector = new JaxbAnnotationIntrospector(mapper.getTypeFactory()); mapper.setAnnotationIntrospector(introspector); return mapper; } } private static class JaxbDateSerializer extends XmlAdapter&lt;String, Date&gt; { private SimpleDateFormat dateFormat = new SimpleDateFormat("MM-dd-yyyy"); @Override public String marshal(Date date) throws Exception { return dateFormat.format(date); } @Override public Date unmarshal(String date) throws Exception { return dateFormat.parse(date); } } private static abstract class ModelObject { } private static class Person extends ModelObject { private String name; private Date bday; public String getName() { return name; } public void setName(String name) { this.name = name; } @XmlElement(name = "birth-day") @XmlJavaTypeAdapter(JaxbDateSerializer.class) public Date getBday() { return bday; } public void setBday(Date bday) { this.bday = bday; } } public static void main(String[] args) { try { Person person = new Person(); person.setName("Jhon Doe"); person.setBday(new Date()); Writer writer = new StringWriter(); JacksonSerializer.getInstance().writeTo(person, Person.class, writer); System.out.println(writer.toString()); } catch (Exception e) { e.printStackTrace(); } } </code></pre> <p>}</p>
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    1. POJackson De/Serializing Date-to-String-to-Date in generic Maps
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    1. USnmorenor
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      1. VTDownMod
    1. COThought not sure why the editor is missing some of the syntax here, I hope it help.
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    2. COThis is a good example of how to use the annotations features. These features allow the developer to specifically assign a de/serializer scheme to a particular field. But my problem is different. The Maps are generic. There are no annotations, only a Map carrying key-value pairs, where the value can be String, Int, Long, BigDecimal, Date, Map, and List. Jackson out of the box supports nice de/serialization of map-of-map constructs and mapper.configure(DeserializationFeature.USE_BIG_DECIMAL_FOR_FLOATS, true) licks the float problem. This leaves Dates.
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      1. USBuzz Moschetti
    3. COOh -- I'd like to add that post-processing a map-of-maps by walking the objects with instanceof is wicked expensive. I'd much rather inject the logic into Jackson at the point where it is deserializing a set of chars.
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