Jsonb jsonb = JsonbBuilder.create(); Person person = new Person("John", 25, "john@example.com"); String json = jsonb.toJson(person); System.out.println(json); String json = "{\"name\":\"John\",\"age\":25,\"email\":\"john@example.com\"}"; Person person = jsonb.fromJson(json, Person.class); System.out.println(person.getName()); JsonbConfig config = new JsonbConfig().withDateFormat("yyyy-MM-dd", Locale.US); Jsonb jsonb = JsonbBuilder.create(config);