Jackson 使用@JsonPOJOBuilder 自定义反序列化

Question

I have such case:

@Getter  //lombook
@Bulider //lombook
@JsonDeserialize(builder = Person.PersonBuilder.class)
public class Person {
    //...

    @JsonDeserialize(using = RawJsonDeserializer.class)
    private String someString;

    @JsonPOJOBuilder
    public static class PersonBuilder{
        //...
    }
}

My custom deserializer:

/**
 * Deserializes from JSON object to string.
 */
public class RawJsonDeserializer extends JsonDeserializer<String> {
    @Override
    public String deserialize(JsonParser parser, DeserializationContext context) throws IOException,
                                                                                        JsonParseException {
        ObjectMapper mapper = (ObjectMapper) parser.getCodec();

        return mapper.writeValueAsString(mapper.readTree(parser));
    }
}

Problem is ignoring RawJsonDeserializer deserializer. How to invoke it when i try get Person object from JSON? For example: From JSON ->

{
  "someString": {
    "key": "value"
  }
}

To Person object where field someString is string ->

Assert.assertEquals("{\"key\": \"value\"},person.getSomeString());" \\ true

Answer 1

I am not familiar with Json serialization but looks like serialization it is conversion of dto into text representation. But in your example you use JsonDeserializer what is wrong. May be I am something misunderstood. Also you collect json object form text and again convert it into text what is confused me