RESTEasy supports @QueryParam annotations with no parameter name..
The @QueryParam annotation allows mapping a URI query string parameter or url form encoded parameter to a method invocation.
GET /books?num=5
@GET
public String getBooks(@QueryParam("num") int num) {
...
}
Since RESTEasy is built on top of a Servlet, it does not distinguish between URI query strings or url form encoded parameters. Like PathParam, the parameter type can be a String, primitive, or class that has a String constructor or static valueOf() method.