Deserialize an object from JSON with Jackson lib

JacksonDeserializeObject.java

/*
https://github.com/FasterXML/jackson
Grade.build
dependencies {
	compile group:'com.fasterxml.jackson', name:'jackson-bom', version: '2.9.8'
}

Input:
{ "first_name" : "John", "last_name" : "Smith" }
{ "first_name" : "John" }
{ "first_name" : "John", "some_prop" : "Some value" }
*/

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;

public class JacksonDeserializeObject {
    public Person getPerson(String json) {
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        try {
            return objectMapper.readValue(json, Person.class);
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }
}

//----------------------------
import com.fasterxml.jackson.annotation.JsonProperty;

public class Person {
    private String firstName;
    private String lastName = null;

    @JsonProperty("first_name")
    public void SetFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getFirstName() {
        return this.firstName;
    }

    @JsonProperty("last_name")
    public void SetLastName(String lastName) { this.lastName = lastName; }

    public String getLastName() {
        return this.lastName;
    }
}