java - 在 ServletRequest 到达 Servlet/Filter 后从中删除查询字符串

Question

现在假设我触发一些 URL 说

http://shoaib:8080/userAuthentication?authenticate=false

现在到了Filter的doFilter方法

public void doFilter(request,response,filterChain){

   boolean authenticate=request.getParameter("authenticate");
   .
   .   //some logic
   .
   .
   filterChain.doFilter(request,response); //this request should not have query String.

} 

将传递给 filterChain 的 doFilter() 的请求不应该有 queryString。我怎样才能做到这一点？

Answer 1

我在考虑覆盖 Filter 方法:

@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) 
    throws ServletException, IOException {
    HttpServletRequest request = (HttpServletRequest) req;
    String requestURI = request.getRequestURI();

    if (requestURI.startsWith(YOUR_CHECK_PATH)) {
       String url = ((HttpServletRequest)request).getRequestURL().toString();
       String queryString = ((HttpServletRequest)request).getQueryString();
        req.getRequestDispatcher(url).forward(req, res);
    } else {
        chain.doFilter(req, res);
    }
}