Maybe a bug about string null of JSONObject

[wangxu0]

A json string, maybe the user's name just is null:

{
  "name": "null",
  "mobile": "123"
}

Parsing：

JSONObject json = JSONObject.fromObject(jsonStr);
System.out.println(json.getString("name"));

Output:

“null”

But expected：

null

I read the source code, the string null is considered a JSON, So quote are added to both ends of the string null.

if( quoted && v instanceof String && (JSONUtils.mayBeJSON( (String) v ) || JSONUtils.isFunction( v ))){
       v = JSONUtils.DOUBLE_QUOTE + v + JSONUtils.DOUBLE_QUOTE;
}
public static boolean mayBeJSON( String string ) {
      return string != null
            && ("null".equals( string )
                  || (string.startsWith( "[" ) && string.endsWith( "]" )) || (string.startsWith( "{" ) && string.endsWith( "}" )));
   }

If this is a bug, I am happy to fix it.

[Alanscut]

hey, if you expected the value is null, then the null of json string should not be wrapped by quotes, instead as follows:

{
  "name": null,
  "mobile": "123"
}

and when get the value of "name", we should use json.get("name") rather than json.getString("name")