Ignore Null Value Fields From Rest API Response Java

Question

In my project when i send Rest Response to Advance Rest Client It only shows Fields which Have some values and Ignores(Does not show) fields which have NULL Values or Empty values.

Part Of Code:

Gson gson=new Gson();
// firstResponse is Object which contains the values
String jsonString = gson.toJson(firstResponse);
test.saveJson(jsonString); //OR System.out.println(jsonString);            
return Response.ok(firstResponse).build(); // Response to Rest Client

Response sample To return Response.ok(firstResponse).build();

Advance rest client From web project :

{
  "Name": "smith",
  "Properties": {
    "propertyList": [
      {
        "ID": "072",
        "Number": "415151",
        "Address": "Somewhere"
      },
      {
        "ID": "151",
        "Number": "a800cc79-99d1-42f1-aeb4-808087b12c9b",
        "Address": "ninink"
      },
      {
        "ID": "269",
      },
    ],
  },
}

Now when i save this as Json String in DB or When i want to Print this to console it also prints the fiels with null or empty values:

{
  "Name": "smith",
  "Properties": {
    "propertyList": [
      {
        "ID": "072",
        "Number": "415151",
        "Address": "Somewhere"
      },
      {
        "ID": "151",
        "Number": "a800cc79-99d1-42f1-aeb4-808087b12c9b",
        "Address": "ninink"
      },
      {
        "ID": "269",
        "Number": "",
        "Address": ""
      },

    ],
  },
  "resultList" :[]
}

How can i print or save this JSON string same as response in rest client i.e. i dont want to print null or empty value field i just want to ignore them.

I suspect it is the translation of this JSON string to your Java object that is adding these values just before saving in database. — anubhava
– anubhava, Commented Aug 26, 2013 at 10:34
First verify by querying the DB directly whether this is indeed the case. If that is true then post your domain class for this JSON as well. — anubhava
– anubhava, Commented Aug 26, 2013 at 10:41

saman.firouzi · Accepted Answer · 2017-10-16 13:21:32Z

2

in top og entity class , try with the annotation

@JsonInclude(Include.NON_EMPTY)

this annotation don't show any empty field in your json.

answered Oct 16, 2017 at 13:21

saman.firouzi

4665 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Community · Accepted Answer · 2017-05-23 11:44:34Z

1

Not giving you a code but here are some pointers for you:

Read the manual: How to handle NULL values
You may need to use a custom exclusion strategy
Also read this Q&A: Gson: How to exclude specific fields from Serialization without annotations

edited May 23, 2017 at 11:44

CommunityBot

11 silver badge

answered Aug 26, 2013 at 10:52

anubhava

790k67 gold badges603 silver badges671 bronze badges

2 Comments

Shiv Over a year ago

1st doesnt ignore null fields rather it shows null values i have a long response with lots of lists in there cant we have Response.ok(firstResponse).build() in db or console to simply ignore null fields or cant we convert this Response to json i tried with get entity but result was same

anubhava Over a year ago

As I wrote: You may need to use a custom exclusion strategy and for example on that use linked Q&A.

Collectives™ on Stack Overflow

Ignore Null Value Fields From Rest API Response Java

2 Answers 2

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related