public static String splitAndFilterString(String input, int length) {        if (input == null || input.trim().equals("")) {            return "";        }        // 去掉所有html元素,        String str = input.replaceAll("\\&[a-zA-Z]{1,10};", "").replaceAll(                "<[^>]*>", "");        str = str.replaceAll("[(/>)<]", "");        int len = str.length();        if (len <= length) {            return str;        } else {            str = str.substring(0, length);            str += "......";        }        return str;    }