GSON Serialize boolean to 0 or 1

Question

All,

I\'m trying to do the following:

public class SomClass
{
    public boolean x;
    public int y;
    public String z;
}       

SomClass s = new Som         


        

Answer 1

or this: Gson User Guide - Custom Serialization and Deserialization

Answer 2

To make it "correct" way, you can use something like that

import java.lang.reflect.Type;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

public class BooleanSerializer implements JsonSerializer<Boolean>, JsonDeserializer<Boolean> {

    @Override
    public JsonElement serialize(Boolean arg0, Type arg1, JsonSerializationContext arg2) {
        return new JsonPrimitive(Boolean.TRUE.equals(arg0));
    }

    @Override
    public Boolean deserialize(JsonElement arg0, Type arg1, JsonDeserializationContext arg2) throws JsonParseException {
        return arg0.getAsInt() == 1;
    }
}

And then use it:

public class Main {

    public class Base {
        @Expose
        @SerializedName("class")
        protected String clazz = getClass().getSimpleName();
        protected String control = "ctrl";
    }

    public class Child extends Base {
        protected String text = "This is text";
        protected Boolean boolTest = false;
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        Main m = new Main();
        GsonBuilder b = new GsonBuilder();
        BooleanSerializer serializer = new BooleanSerializer();
        b.registerTypeAdapter(Boolean.class, serializer);
        b.registerTypeAdapter(boolean.class, serializer);
        Gson gson = b.create();

        Child c = m.new Child();
        System.out.println(gson.toJson(c));
        String testStr = "{\"text\":\"This is text\",\"boolTest\":1,\"class\":\"Child\",\"control\":\"ctrl\"}";
        Child cc = gson.fromJson(testStr, Main.Child.class);
        System.out.println(gson.toJson(cc));
    }
}

Hope this helps someone :-)