Ignoring a field without changing the POJO class using Jackson

Question

My POJO class has @JsonIgnorefields in the declaration, not getter and setter methods. This is a generated file, and I cannot change it much.

How to ignore this field when recording with JsonGenerator.Setting? Use @JsonIgnorefor getters and setters. But it cannot modify the created POJO class.

Answer 1

Configuring Jackson to use field annotations only

Once annotations are placed in fields, you can configure ObjectMapperto use only field annotations, ignoring the annotations of the getters and seters methods:

ObjectMapper mapper = new ObjectMapper();    
mapper.setVisibility(PropertyAccessor.ALL, Visibility.NONE);
mapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);

Annotations for Jackson Mixons

, POJO . - , .

( ):

public interface FooMixIn {

    @JsonIgnore
    String getBar();
}

ObjectMapper, ( ) POJO:

ObjectMapper mapper = new ObjectMapper().enable(SerializationFeature.INDENT_OUTPUT)
                                        .addMixIn(Foo.class, FooMixIn.class); 

:

• , , .
• ( , , , ) .
• ( ): (private, protected,...) .

. .

Answer 2

transients, , json ...