public ActionForward confirmTrans(final ActionMapping mapping,            final ActionForm actionForm, final HttpServletRequest req,            final HttpServletResponse res) throws Exception {        String str= decodeToUtf(req.getParameter("str"));        return null;        }public static String decodeToUtf(Object obj) {        String reStr = obj != null ? obj.toString() : "";        String regEx = "[+]";        Pattern p = Pattern.compile(regEx);        Matcher m = p.matcher(reStr);        reStr = m.replaceAll("【SPSOFT】＋【SPSOFT】");        try {            reStr = URLDecoder.decode(reStr, "UTF-8");            reStr = reStr.replaceAll("【SPSOFT】＋【SPSOFT】", "+");        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }        return reStr;    }

var str= encodeURI(str);str= encodeURI(str);var url = path + actionPath + "&str=" + str;