JSON string from Gson: remove double quotes

Question

Here is an example of my Json code:

array(\"id\" => 0, \"navn\" => \"Vind telefon\", \"udgiver\" => \"Telia\", \"beskrivelse\" => utf8_encode(\"V         


        

Answer 1

public class StringTypeSerializationAdapter extends TypeAdapter<String> {


public String read(JsonReader reader) {
    throw new UnsupportedOperationException();
}

public void write(JsonWriter writer, String value) throws IOException {
    if (value == null) {
        writer.nullValue();
        return;
    }
    writer.jsonValue(value);
}
}

above will help you removing double quotes across strings. this is using GSON library

Answer 2

It's not documented properly, but JsonElement#toString() gets you a string that represents the JSON element and would be appropriate for re-creating the JSON serialization. What you want is JsonElement#getAsString(). This will throw an error if you're not looking at a string, but if you are, you'll get the string value.

Here's a test program to demonstrate:

import com.google.gson.JsonElement;
import com.google.gson.JsonParser;
public class Test {
    public static void main(String[] args) {
        String in = "{\"hello\":\"world\"}";
        System.out.println(in);
        JsonElement root = new JsonParser().parse(in);
        System.out.println(root.getAsJsonObject().get("hello").toString());
        System.out.println(root.getAsJsonObject().get("hello").getAsString());
    }
}

And its output:

{"hello":"world"}
"world"
world

Answer 3

To put object or array properties into your JsonObject and get them back as objects and arrays (not as string), use the approach:

new JsonObject().add(
  "mySubobject",
  new Gson().toJsonTree(
    new JsonObject()));