JsonIgnoreProperties not working

Question

I have the following simple class:

import org.codehaus.jackson.annotate.JsonIgnoreProperties;
@JsonIgnoreProperties({ "thirdField" })
public class Message {

    private TypeA type;
    private String producer;

//Getters and Setters

}

in my test class

import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

public class Test {
   public void testMethd() {
   ObjectMapper objectMapper = new ObjectMapper();
   objectMapper.configure(MapperFeature.USE_ANNOTATIONS, true);
   Class<T> instanceType = Message.class;

   String msgBody = "{\"producer\": \"clientApp\", \"type\": \"aType\", \"thirdField\": []}";
   objectMapper.readValue(msgBody, instanceType);
   }
}

All I am trying to do is to convert the above json string into Message class and ignore the 'thirdField'. But I keep getting

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "thirdField" (class Message), not marked as ignorable (2 known properties: , "type", "producer"])

Lukasz Wiktor · Accepted Answer · 2014-12-29T09:03:37.297

51

You've mixed different versions of Jackson. Notice that you import JsonIgnoreProperties from org.codehaus.jackson.annotate (version 1.x) while you're using ObjectMapper from com.fasterxml.jackson.databind (version 2.x).

edited Dec 29 '14 at 09:03

answered Jan 08 '14 at 07:27

Lukasz Wiktor

19,644
5
69
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1

Good catch. I changed it to import com.fasterxml.jackson.annotation.JsonIgnoreProperties; but still get the same exception – kk1957 Jan 08 '14 at 15:13
1

@kk1957 I reproduced your case with the only difference that I imported JsonIgnoreProperties from com.fasterxml.jackson.annotation and it worked - no exceptions, message object was deserialized corectly. Try to checkout https://github.com/LukaszWiktor/json-ignore-properties-test and run Test.main() – Lukasz Wiktor Jan 09 '14 at 12:04
Yeah, looks like there were other things wrong in my set up. Thanks for the help. – kk1957 Jan 09 '14 at 15:47
1

Thank you, I was looking what the hell I was doing wrong following examples at https://github.com/helun/Ektorp while using latest version of jackson lib. – Miha Pirnat Feb 28 '17 at 10:00
1

@MihaPirnat I'm glad that my answer is still helpful after 3 years. – Lukasz Wiktor Feb 28 '17 at 10:27
@LukaszWiktor yeah, their tutorial still has old example and novices like me still fall for it: Here's an trivial example class: import org.codehaus.jackson.annotate.*; – Miha Pirnat Feb 28 '17 at 10:35
flawless answer! Saved the day! – Gaurav May 21 '20 at 12:04
1

@gaurav It's amazing that my answer is still helpful after over 6 years! – Lukasz Wiktor May 21 '20 at 17:19

score 5 · Answer 2 · answered Sep 04 '14 at 21:37

Try using the last Jackson version (2.4):

import com.fasterxml.jackson.annotation.JsonIgnoreProperties
@JsonIgnoreProperties({"id"})

Here you can find an example where it's implement using version 2.4: http://www.ibm.com/developerworks/java/library/j-hangman-app/index.html

score 0 · Answer 3 · answered Nov 06 '19 at 09:09

I found a Solution to this. Try to add

@JsonSerialize(include= JsonSerialize.Inclusion.NON_EMPTY)

About your class

@JsonSerialize(include= JsonSerialize.Inclusion.NON_EMPTY)
class ResponseModel {
 //your properties here
 @JsonIgnoreProperties("messageList","contactList","sender")
    var contactList= ArrayList<ContactModel>()
}

That will solve your issue buddy.

score -1 · Answer 4 · answered Oct 26 '17 at 17:03

-1

It didn't work for me any of the above answers, i found a workaround that I have reinitialized the object and values (copied the object).

answered Oct 26 '17 at 17:03

Senthil Arumugam SP

1,461
12
17

JsonIgnoreProperties not working

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