升级Jackson-databind后，缺少的字段被反序列化为null而不是空对象

@JsonInclude(JsonInclude.Include.NON_NULL)
public class MyClass {
    private String field1;
    private String field2;
    // getters and setters
}

public class MyClass {
    private String field1;
    private String field2;
    
    @JsonSetter(nulls = Nulls.AS_EMPTY)
    public void setField1(String field1) {
        this.field1 = field1;
    }
    // getter and setter for field2
}

public class MyDeserializer extends JsonDeserializer<MyClass> {
    @Override
    public MyClass deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
        ObjectCodec codec = jsonParser.getCodec();
        JsonNode node = codec.readTree(jsonParser);
        
        String field1 = node.has("field1") ? node.get("field1").asText() : "";
        String field2 = node.has("field2") ? node.get("field2").asText() : "";
        
        MyClass myClass = new MyClass();
        myClass.setField1(field1);
        myClass.setField2(field2);
        
        return myClass;
    }
}

@JsonDeserialize(using = MyDeserializer.class)
public class MyClass {
    private String field1;
    private String field2;
    // getters and setters
}