REST Service doesn't work after a simple change

I follow this tutorial to learn some REST services and AJAX calls: http://www.mkyong.com/webservices/jax-rs/integrate-jackson-with-resteasy/

I changed this endpoint:

@GET
@Path("/get")
@Produces("application/json")
public Product getProductInJSON() {

    Product product = n开发者_StackOverflowew Product();
    product.setName("iPad 3");
    product.setQty(999);

    return product; 

}

to this one, in order to return the product in the jsonp format:

@GET
@Path("/get?callback={name}")
@Produces("application/javascript")
public String getProductInJSON(@PathParam("name") String callback){

    Product product = new Product();
    product.setName("iPad 3");
    product.setQty(999);

    String productString = callback + "({" + product.toString() + "})";

    return productString; 

}

with the toString() of product:

@Override
public String toString() {
    return "name:" + name + "," + "qty:" + qty;
}

But now, when I check ir the URI works in the browser, with:

http://localhost:8080/restws/json/product/get?callback=process

i have this error message:

HTTP ERROR: 404

Could not find resource for relative : /json/product/get of full path: http://localhost:8080/restws/json/product/get?callback=process

RequestURI=/restws/json/product/get

Can somebody help me with understanding why it's giving me this error after this minor changing? Thanks

A query parameter isn't part of the @Path. You should handle them with @QueryParam as shown in the Jersey User Guide.