页面格式失效，CSS未载入

清除了一下浏览器缓存，现在CSS不能载入

package com.imooc.filter;

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.imooc.domain.User;

public class AuthFilter implements Filter {

@Override

public void destroy() {

// TODO Auto-generated method stub

}

@Override

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)

throws IOException, ServletException {

HttpServletRequest req = (HttpServletRequest) request;

HttpServletResponse res = (HttpServletResponse) response;

User user = (User) req.getSession().getAttribute("existUser");

String reqURL = req.getRequestURI().toString();

// 设置不拦截的URL

String[] noURL = { "login", "login.jsp", ".js", ".css", ".png", ".jpg","LoginServlet","KaptchaServlet"};

for (String url : noURL)

if (reqURL.endsWith(url)) {

chain.doFilter(request, response);

return;

}

// 判断用户是否登录

if (user != null) {

chain.doFilter(request, response);

} else {

res.sendRedirect(req.getContextPath() + "/login.jsp");

}

}

@Override

public void init(FilterConfig filterConfig) throws ServletException {

// TODO Auto-generated method stub

}

}

网上搜索了一些答案，说是过滤器的问题，但是试验了一下，还是没解决