When parse the string to JsonElement, how to avoid auto read escape character?

Question

I have a simple json str like below

{
"foo":"\uv"
}

I want to use gson to parse this str to jsonElement. eg.

String input = "{\"foo\":\"\\uv\"}";
JsonElement element = JsonParser.parseString(input);

But gson throw the com.google.gson.JsonSyntaxException, java.lang.NumberFormatException: \uv

It seems like when JsonReader meet the '\', it will automaticly treat it as a escape character.So, What can I do to make gson treat it as plain text instead of escape character?

Answer 1

What you want to do should not be possible. Forcing gson to accept \ as plain text would be forcing it to not follow json conventions.

Also your json is not valid, correct one would be:

{
  "foo":"\\uv"
}

Check gson adding backslash in string, it has good explanation. Using your code as example:

public class Temp {

  public static void main(String[] args) {
    String input = "{\"foo\":\"\\\\uv\"}";
    JsonElement element = JsonParser.parseString(input);
    System.out.println("foo value - " + element.getAsJsonObject().getAsJsonPrimitive("foo").getAsString());
  }
}

This prints - foo value - \uv, which should be exactly the value your consumers need.