HttpServletRequest獲取請求參數中所有的信息

/**
     * 獲取客戶端請求參數中所有的信息
     * @param request
     * @return
     */
    private Map<String, String> getAllRequestParam(final HttpServletRequest request) {
        Map<String, String> res = new HashMap<String, String>();
        Enumeration<?> temp = request.getParameterNames();
        if (null != temp) {
            while (temp.hasMoreElements()) {
                String en = (String) temp.nextElement();
                String value = request.getParameter(en);
                res.put(en, value);
                //如果字段的值為空，判斷若值為空，則刪除這個字段>
                if (null == res.get(en) || "".equals(res.get(en))) {
                    res.remove(en);
                }
            }
        }
        return res;
    }