java获取formdata里的所有参数

private Map<String, String> getParamsFromFormDataByNames(HttpServletRequest request){
        Map<String, String> map =new HashMap<>();
        Enumeration<String> er = request.getParameterNames();
        while (er.hasMoreElements()) {
            String name = (String) er.nextElement();
            String value = request.getParameter(name);
            map.put(name, value);
        }
        return map;
    }