学习日记：关于javaweb filter中过滤了css文件的解决方法

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest req=(HttpServletRequest) request; 
        HttpServletResponse res=(HttpServletResponse) response;    
        //获取请求界面的路径
        String a=req.getRequestURI();
        if(a.contains(".css") || a.contains(".js") || a.contains(".png")|| a.contains(".jpg")){
            //如果发现是css或者js文件，直接放行
               chain.doFilter(request, response);
            }
 }