public char nextClean() throws JSONException {
        for (; ; ) {
            char c = this.next();
            if (c == 0 || c > ' ') {
                return c;
            }
        }
    }
@author Robert HG (254963746@qq.com) on 12/28/15.
lts-core/src/main/java/com/github/ltsopensource/json/JSONTokenizer.java