How to deserialize a json file to Map[String,String] in scala?

[dineshbt]

It works fine for me in java where as in scala i am getting the below exception. Please let me know how can i resolve this?

val jsonContent ="""{"test":"113123","myList":{"test2":"321323"}}"""
val mapData = mapper.readValue(jsonContent, classOf[Map[String,String]])

Error:

com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of scala.collection.immutable.Map, problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information
at [Source: java.io.StringReader@603b1d04; line: 1, column: 1]

[christophercurrie]

It looks like you didn't add the Scala module to the object mapper. Without the module, Jackson doesn't know how to deserialize the Scala collection class scala.collection.immutable.Map, because it doesn't implement any of the Java collection interfaces.

You can either deserialize to a Java collection:

val mapData = mapper.readValue(jsonContent, classOf[java.util.Map[String,String]])

or add the Scala module to the mapper:

mapper.registerModule(DefaultScalaModule)
val mapData = mapper.readValue(jsonContent, classOf[Map[String,String]])

[dineshbt]

Thanks Christopher. It worked after registering the scalamodule to the mapper.
mapper.registerModule(DefaultScalaModule)

[sccu]

Thanks christophercurrie. It helped me, too.