为什么用了过滤器后用a href传来的参数用request.getParameter取不到了？

[jujuble]

去掉过滤器以后就好了
我吧过滤器的代码贴出来，大家帮我看看吧
public void doFilter(final ServletRequest request,
final ServletResponse response,
FilterChain chain) throws java.io.IOException,
javax.servlet.ServletException {
HttpServletRequest httprequest = (HttpServletRequest) request;
HttpServletResponse httpresponse = (HttpServletResponse) response;
GenericRequestWrapper wrapper = new GenericRequestWrapper(httprequest);
String isloginok = (String) httprequest.getSession().getAttribute(
"isloginok");
if (isloginok == null) {
httpresponse.sendRedirect("/archives/deny.htm");
}
else {
if (isloginok.equals("yes")) {
chain.doFilter(wrapper, response);
}
else {
httpresponse.sendRedirect("/archives/a.htm");
}
}
}

[jujuble]

怎么改呢？难道用了过滤器,request都不能用了吗？

[blue999star]

你的过滤器做了什么工作？实现什么过滤了？请高手指点…………

[jujuble]

我的过滤器是判断用户登陆了没有

[dmhorse]

mark

[yaray]

HttpServletRequest httprequest = (HttpServletRequest) request;

是不是向上塑型出了问题? (仅猜测)

[Croatia]

chain.doFilter(wrapper, response);
尝试一下，用原来的request传回去，我想没有什么问题，你只是从session里面取来你要判断的东西，没有必要，再返回的时候，变更request.