javascript中文乱码怎么办

charset="utf-8"

 public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ioException, ServletException {
        // 请求和响应强转为子类类型
        httpservletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
 
        String URI = request.getRequestURI() ;
        //对CSS js png 文件进行判断，true则直接放行。
        if (URI.contains(".css") || URI.contains(".js") || URI.contains(".png")) {
            chain.doFilter(request, response);
            return ;
        }
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        response.setContentType("text/html");
        chain.doFilter(request, response);
    }

    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>com.huang.filter.CharacterEncodingFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>