Error 415 Unsupported Media Type: POST not reaching REST if JSON, but it does if XML

Question

I am actually new to REST WS but really I don\'t get this 415 Unsupported Media Type.

I am testing my REST with Poster on Firefox and the GET

Answer 1

I had this issue and found that the problem was that I had not registered the JacksonFeature class:

// Create JAX-RS application.
final Application application = new ResourceConfig()
    ...
    .register(JacksonFeature.class);

Without doing this your application does not know how to convert the JSON to a java object.

https://jersey.java.net/documentation/latest/media.html#json.jackson