I am working on converting a REST/JSON service from Coldfusion 9 to a Spring-MVC 3.1 application. I am using Jackson (1.9.5) and the MappingJacksonJsonConverter that Spring provides, and am customizing the ObjectMapper to name fields with CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES. The problem I am facing is that our legacy service produces 'camel case to UPPER case with underscores' as json proper