Use multi-part data with POJOs
23.11. @MultipartForm and POJOs If you have a exact knowledge of your multipart/form-data packets, you can map them to and from a POJO class to and from multipart/form-data using the @org.jboss.resteasy.annotations.providers.multipart.MultipartForm annotation and the JAX-RS @FormParam annotation. You simple define a POJO with at least a default constructor and annotate its fields and/or properties with @FormParams. These @FormParams must also be annotated with @org.jboss.resteasy.annotations.providers.multipart.PartType if you are doing output