toppings.add(new Topping("pineapple", 0.50));
toppings.add(new Topping("ham", 0.50));
toppings.add(new Topping("peperoni", 0.50));
StringWriter sw = new StringWriter();
mapper.writeValue(sw, toppings);
System.out.println("Response: " + sw.toString());
resp.setContentType(Resource.CONTENT_TYPE_JSON);
mapper.writeValue(resp.getOutputStream(), toppings);