Answers for "jackson string to json"

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"));
}

convert json to object jackson

ObjectMapper objectMapper = new ObjectMapper();

String carJson =
    "{ \"brand\" : \"Mercedes\", \"doors\" : 5 }";

try {
    Car car = objectMapper.readValue(carJson, Car.class);

    System.out.println("car brand = " + car.getBrand());
    System.out.println("car doors = " + car.getDoors());
} catch (IOException e) {
    e.printStackTrace();
}

jackson object to json

val objectMapper = ObjectMapper()
val car = Car("yellow", "renault")
objectMapper.writeValueAsString(car)