How to add @JsonIgnore annotated fields in serializing in Jackson ObectMapper

Question

I need to add @JsonIgnore annotated fields while serializing an object by Jackson ObjectMapper. I know you may offer me to remove the @JsonIgnore

Answer 1

You can define a SimpleBeanPropertyFilter and FilterProvider.

First annotate your class with custom filter like this:

@JsonFilter("firstFilter")
public class MyDtoWithFilter {

    private String name;

    private String anotherName;
    private SecondDtoWithFilter dtoWith;

    // get set ....
}
 @JsonFilter("secondFilter")
public class SecondDtoWithFilter{
    private long id;
    private String secondName;
}

and this is how you will dynamically serialise your object.

    ObjectMapper mapper = new ObjectMapper();

    // Field that not to be serialised. 
    SimpleBeanPropertyFilter firstFilter = SimpleBeanPropertyFilter.serializeAllExcept("anotherName");
     SimpleBeanPropertyFilter secondFilter = SimpleBeanPropertyFilter.serializeAllExcept("secondName");

    FilterProvider filters = new SimpleFilterProvider().addFilter("firstFilter", firstFilter).addFilter("secondFilter", secondFilter);

    MyDtoWithFilter dtoObject = new MyDtoWithFilter();
    String dtoAsString = mapper.writer(filters).writeValueAsString(dtoObject);