Small Example of Jackson Scala Module?

Question

Can anyone point me towards a simple example of Jackson serialization/deserialization with their Scala module for 2.10? I'm looking for reflection-based JSON not requiring field-by-field annotation or assignment and it seemed this could do that, but their documentation includes no examples.

If I have a case class:

case class Person(name:String, age:Int) val person = Person("Fred", 65) 

So from their github readme:

val mapper = new ObjectMapper() mapper.registerModule(DefaultScalaModule) 

OK, now what...? How to I convert p to/from JSON?

Answer 1

Give this a shot:

val person = Person("fred", 25) val mapper = new ObjectMapper() mapper.registerModule(DefaultScalaModule)      val out = new StringWriter mapper.writeValue(out, person) val json = out.toString() println(json)  val person2 = mapper.readValue(json, classOf[Person]) println(person2) 

EDIT

Just be sure to declare the Person class as top level as it will not work otherwise.