Jackson: How to add custom property to the JSON without modifying the POJO

Question

I am developing a REST interface for my app using Jackson to serialize my POJO domain objects to JSON representation. I want to customize the serialization for some types to

Answer 1

Another and perhaps the most simple solution:

Make serialisation a 2-step process. First create a Map like:

Map map = req.mapper().convertValue( result, new TypeReference>() {} );

then add the properties you want like:

map.put( "custom", "value" );

then serialise this to json:

String json = req.mapper().writeValueAsString( map );