ObjectMapperUtil { public String writeValueAsString(Object object) { try { return objectMapper.writeValueAsString(object); } catch (JsonProcessingException e) { throw new JsonSerializeFailed(e.getMessage()); } }  String writeValueAsString(Object object); T readValue(String json, Class<T> clazz);  }
@Test public void writeValueAsString_test() { final Member member = new Member(""); objectMapperUtil.writeValueAsString(member); }