Java把换行符空格置位符换成空字符

cn.hutool.json.JSONException: Unterminated string at 396 [character 0 line 2]

    public static String replaceWithBlank(String str){
        Pattern p = Pattern.compile("\\s*|\t|\r|\n");
        Matcher m = p.matcher(str);
        String finishedReplaceStr = m.replaceAll("");
        return finishedReplaceStr;
    }