JettisonMappedXmlDriver Simple XStream driver wrapping Jettison's Mapped reader and writer. 
JettisonStaxWriter A specialized StaxWriter that makes usage of internal functionality of Jettison. 
JsonHierarchicalStreamDriver A driver for JSON that writes optimized JSON format, but is not able to deserialize the result. 
JsonHierarchicalStreamWriter This class is deprecated. since 1.3.1, use JsonWriter instead  
JsonWriter A simple writer that outputs JSON in a pretty-printed indented stream.