为什么我设置字符过滤器后登录页面css失效了？？我是想只过滤page页面，这样写的为什么不可以呢？

问题描述：

为什么我设置字符过滤器后登录页面css失效了？？我是想只过滤page页面，这样写的为什么不可以呢？

package com.imooc.bookmanager.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class EncodeFilter implements Filter {
    private static String encoding;
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        //接收web.xml配置文件中的初始参数
        encoding = filterConfig.getInitParameter("CharsetEncoding");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //请求的字符编码设置为“UTF-8”
        request.setCharacterEncoding(encoding);
        //响应的字符编码设置为“UTF-8”（仅将page页面设置）
        String uri = request.getRequestURI();
        System.out.println(uri);
        if (uri.contains("page")) {
            response.setContentType("text/html;charset="+encoding);
        }
        filterChain.doFilter(servletRequest, servletResponse);

    }

    @Override
    public void destroy() {

    }
}

相关截图：

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