JAVA

jackson ignore null

public class MyDto {     
	@JsonInclude(Include.NON_NULL)
  	private String stringValue;
  
  	private int intValue;     // standard getters and setters
}

jackson ignore value if null

public class Object {
  
    @JsonInclude(NON_NULL)
    @JsonProperty("property")
    private String property;
  
}

jackson ignore null fields

mapper.setSerializationInclusion(Include.NON_NULL);

jackson ignore null fields

@JsonSerialize(include=JsonSerialize.Inclusion.NON_NULL) 

jackson ignore null fields

@JsonInclude(Include.NON_NULL)
public String getStudentName() {
    return studentName;
}
(or)
@JsonInclude(Include.NON_NULL)
public void setStudentName(String studentName) {
    this.studentName = studentName;
}

jackson ignore null fields

mapper.getSerializationConfig().setSerializationInclusion(Inclusion.NON_NULL);

jackson ignore null

mapper.setSerializationInclusion(Include.NON_NULL);