@Webfilter用于重复用户 - 无法正常工作

Question

我的Webfilter代码如下所示：

@WebFilter(
urlPatterns={"/search.jsp"},
dispatcherTypes= {
    DispatcherType.FORWARD,
    DispatcherType.REQUEST
    },
    filterName="LoggingFilter",
    description="Checks if user already logged in"
)
public class FilterAlreadyLoggedUser implements Filter {


public FilterAlreadyLoggedUser() {}


public void destroy() {}


public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException {
     HttpServletRequest request = (HttpServletRequest) servletRequest;
     HttpServletResponse response = (HttpServletResponse) servletResponse;
     HttpSession session = request.getSession(false);

     if(session.getAttribute("customer") != null){ //If user is already logged in
         response.sendRedirect(request.getContextPath() + "/alreadyLoggedIn.jsp");
       } else{
            chain.doFilter(servletRequest, servletResponse);
      }
}


public void init(FilterConfig fConfig) throws ServletException {}

}

我将此过滤器称为bevor，客户应该看到包含所有相关内容的search.jsp。

因此，使用此过滤器，我想检查客户是否已登录。 但它没有工作。 有人可以告诉我为什么吗？

由于