filter过滤器进入死循环怎么解决？

Question

代码如下：
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest req=(HttpServletRequest)request;
HttpServletResponse res=(HttpServletResponse)response;
Object user =req.getSession().getAttribute("userName");
System.out.println("过滤中");
String urlString = req.getRequestURI();
if(urlString.endsWith("login.jsp")||urlString.endsWith("LoginFilter")){
chain.doFilter(request,response);
return;
}

else if(user==null){
res.sendRedirect("../jsp/login/login.jsp");
}else{
chain.doFilter(request, response);
}
}
配置如下：

LoginFilter
com.gpeight.hotel.filter.LoginFilter


LoginFilter
/*

Answer 1

过滤器有配置通过的例外，你把能通过的请求记得配上，不然过不去