Scala jackson jersey-client: Arcane incantation that gets Jersey client serializing scala types. dependencies: 'org.scala-lang:scala-library:2.10.3', 'com.fasterxml.jackson.module:jackson-module-scala_2.10:2.3.3', 'com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:2.3.3', 'com.sun.jersey:jersey-client:1.18.1'

ScalaJacksonJerseyClient.scala

val client = Client.create(new DefaultClientConfig(
  classOf[ScalaJacksonJsonProvider]
))

class ScalaJacksonJsonProvider extends JacksonJsonProvider(new ObjectMapper().registerModule(DefaultScalaModule)) {}

// sample usages

val stringResult = client.resource("http://localhost:8080/service").get(new GenericType[String](){})

val jacksonResult = client.resource("http://localhost:8080/service").post(new GenericType[JsonNode](){}, """
  {
    "literal": "json",
    "stuff": [
      {
        "things": 5
      }
    ]
  }
""")

val mapResult = client.resource("http://localhost:8080/service").post(new GenericType[Map[String, _]](){}, Map(
  "key" -> "value",
  "numbers" -> List(1, 2, 3, 5),
  "nested" -> Map(
    "inner" -> "circle"
  )
)