serialVersionUID added to JSON

Question

I am converting an object to JSON using com.google.code.gson:gson:2.2.4 library by using code:

String json = new GsonBuilder().excludeFieldsWithModifiers(Modifier.PROTECTED).create().toJson(object);

And in the JSON string "serialVersionUID" is added automatically with Long value even if it is not in a model class. I just want to remove serialVersionUID from JSON.

Then your class inherits a class that has a non-static `serialVersionUID` field. Can you modify the base class and make that field static as it's supposed to be? — Lyubomyr Shaydariv, Apr 18 '17 at 09:41
When I am using new Gson().toJson(object) then it is no adding serialVersionUID in JSON. — Rajat Mehra, Apr 18 '17 at 09:44
Ah, sorry I was wrong about the Gson configuration. You just have to change the modifiers mask to `Modifier.PROTECTED | Modifier.STATIC`. (I never had (de)serializing static fields in mind and never use non-standard exclusion modifiers). — Lyubomyr Shaydariv, Apr 18 '17 at 09:47
@LyubomyrShaydariv Thanks... This is what I want. Working properly. — Rajat Mehra, Apr 18 '17 at 09:55

score 0 · Answer 1 · answered Aug 28 '17 at 23:17

0

I found this answer. Basically, the serialVersionUID is added by InstantRun, disabling InstantRun solved the issue for me.

answered Aug 28 '17 at 23:17

user2880229

151
8

score 0 · Answer 2 · answered Aug 28 '17 at 23:54

One way to get around this is to use GsonBuilder.excludeFieldsWithoutExposeAnnotation then use the @Expose annotation to explicitly mark what is or isn't (de)serialized.

public class SomeClass {
    private int field1 = 2;
    @Expose private int field2 = 6;
    @Expose @SerializedName ("foo") private int field3 = 12;
}

gives you {"field2":6, "foo":12}. The field field1 is excluded because it isn't annotated with @Expose.

Personally, I always use the GsonBuilder.excludeFieldsWithoutExposeAnnotation because it filters out any generated fields (like the Instant Run comment above). If you didn't annotate it with @Expose, it won't be serialized/deserialized.

Another way is to declare the field as transient.

serialVersionUID added to JSON

2 Answers2