拦截器preHandle拦截接口没有权限返回

/**
 * 响应信息
 *
 * @param response 返回信息
 */
public static void response(HttpServletResponse response) {
    response.setCharacterEncoding("UTF-8");
    response.setContentType("application/json; charset=utf-8");
    PrintWriter out;
    try {
        JSONObject res = new JSONObject();
        res.put("code", 401);
        res.put("message", "访问无权限");
        out = response.getWriter();
        out.append(res.toString());
    } catch (Exception e) {
        e.printStackTrace();
    }
}