how correctly produce json by RESTFUL web service on Fuse ESB?

[eman azmy]

I'm using FUSE ESB and CXf and JSON, I implement a restful web service as the following:

RestFul Method:
@GET
@Path("/user")
@Produces(MediaType.APPLICATION_JSON)
public User handleGeUser() {
User user = new User();
return user;
}
The provider in the bundle-context.xml
<jaxrs:providers>
<bean class="org.apache.cxf.jaxrs.provider.JSONProvider">
<property name="dropRootElement" value="true" />
<property name="supportUnwrapped" value="true" />
</bean>
</jaxrs:providers>


and I got this error "No message body writer has been found for response class User." when calling the my rest service.

could any one advise?