jackson create object node from string
@Testpublic
void givenTheJsonNode_whenRetrievingDataFromId_thenCorrect() throws JsonParseException, IOException {
String jsonString = "{"k1":"v1","k2":"v2"}";
ObjectMapper mapper = new ObjectMapper();
JsonNode actualObj = mapper.readTree(jsonString);
JsonNode jsonNode1 = actualObj.get("k1");
assertThat(jsonNode1.textValue(), equalTo("v1"));
}