从FieldError中得到信息

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->public synchronized static String getInfoFromStruts(
            HttpServletRequest request) {
        String info = "";
        if (request.getAttribute(Constant.VALUE_STACK_NAME) != null) {
            ValueStack vs = (ValueStack) request
                    .getAttribute(Constant.VALUE_STACK_NAME);
            HashMap hp = (HashMap) vs.findValue("fieldErrors");
            for (Iterator<String> it = hp.keySet().iterator(); it.hasNext();) {
                String key = it.next();
                List value = (ArrayList) hp.get(key);
                info += value.get(0) + "<br />";
            }
        }
        return info;
    }