springboot内置的tomcat

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在看尚硅谷的教程时，跟着写了一遍springboot的拦截器，主要代码如下

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public class LoginHandlerInterceptor implements HandlerInterceptor {
    //目标方法执行之前
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object user = request.getSession().getAttribute("loginUser");
        if(user == null){
            //未登陆，返回登陆页面
           /* HttpSession session=(HttpSession)request.getSession();
            session.setAttribute("msg","没有权限请先登陆");*/
            //request.getRequestDispatcher("/login.html").forward(request,response);
            response.sendRedirect("/crud/index.html");
            return false;
        }else{
            //已登陆，放行请求
            return true;
        }

    }

结果发现它会拦截静态资源，这和老师讲的不一样呀，于是就网上查，发现是spingboot版本的问题，我用的是2.2.0，静态资源也全部拦截了，而且还抛了个异常（瞧我这暴脾气）：

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java.lang.AbstractMethodError: org.apache.tomcat.websocket.server.WsSessionListener.sessionCreated(Ljavax/servlet/http/HttpSessionEvent;)V
	at org.apache.catalina.session.StandardSession.tellNew(StandardSession.java:388) [tomcat-embed-core-9.0.27.jar:9.0.27]
	at org.apache.catalina.session.StandardSession.setId(StandardSession.java:360) [tomcat-embed-core-9.0.27.jar:9.0.27]
	at org.apache.catalina.session.StandardSession.setId(StandardSession.java:341) [tomcat-embed-core-9.0.27.jar:9.0.27]
	at org.apache.catalina.session.ManagerBase.createSession(ManagerBase.java:686)

springboot2.2.0默认Tomcat是9.0.27版本的，使用servlet4.0，但是SpringBoot 2.x还包含着 servlet3.1，版本不兼容，网上说的解决办法是在pom里更换Tomcat为低版本，可是之后发现springboot在调用Tomcat9.0.27中新添加的部分接口，强行更换会报异常：

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An attempt was made to call a method that does not exist. The attempt was made from the following location: org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:175)
The following method did not exist:
    org.apache.tomcat.util.modeler.Registry.disableRegistry()V

未找到解决办法

待续。。。

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