如何删除HttpServletRequest参数(在JSP中)? [英] How to remove HttpServletRequest parameters (in JSP)?

问题描述

如何取消设置或删除HttpServletRequest参数(尤其是在JSP中)(例如在PHP中使用unset($_POST['index'])函数)?我尝试了以下方法.

How can an HttpServletRequest parameter (especially in JSP) be unset or removed (like in PHP using the unset($_POST['index']) function)? I have tried the following.

Map requestMap=request.getParameterMap();
requestMap.remove("index");

但它说

不允许对锁定的ParameterMap进行修改

No modifications are allowed to a locked ParameterMap

是否可以取消设置请求参数?

Is there a way to unset request parameters?

推荐答案

是否可以取消设置请求参数?

Is there a way to unset request parameters?

AFAIK，不在JSP本身(或与此相关的任何Servlet)之内.

AFAIK, not within the JSP itself (or any Servlet for that matter).

但是您可以编写一个Filter，以替换参数映射的方式包装当前的Request.

But you could write a Filter that wrapped the current Request in a way that replaces the parameter map.

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