JacksonExample.java

import java.util.Calendar;

import lombok.Builder;
import lombok.Value;

import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.annotation.JsonNaming;

@Builder
@Value
@JsonNaming(PropertyNamingStrategy.SnakeCaseStrategy.class)
public class JacksonExample {
    private String fieldOne;
    @JsonIgnore
    private String fieldTwo;
    @JsonFormat(shape = JsonFormat.Shape.STRING)
    private Calendar someDate;
}