jackson ignore values if empty
// every Value
@JsonInclude(JsonInclude.Include.NON_EMPTY)
public class ObjectWithoutEmpty {
  	// only not empty Values get included 
    @JsonProperty("propertyOne")
    private String propertyOne;
  	// only not empty Values get included 
    @JsonProperty("propertyTWO")
    private String propertyTWO;
}
// one property
public class ObjectWithoutEmpty {
  	// only non empty Values get included 
  	@JsonInclude(JsonInclude.Include.NON_EMPTY)
    @JsonProperty("propertyOne")
    private String propertyOne;
  
	// empty Values get included 
    @JsonProperty("propertyTWO")
    private String propertyTWO;
}
