@SpringBootApplication
@ServletComponentScan
public class SpringbootstudyApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringbootstudyApplication.class, args);
    }
}

//過濾器攔截路徑
@WebFilter(urlPatterns = "/api/*", filterName = "loginFilter")
public class LoginFilter  implements Filter{
     /**
      * 容器加載的時候調(diào)用
      */
      @Override
      public void init(FilterConfig filterConfig) throws ServletException {
          System.out.println("攔截器進(jìn)入========攔截器進(jìn)入========");
      }
      /**
       * 請求被攔截的時候進(jìn)行調(diào)用
       */
      @Override
      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
          System.out.println("攔截中========攔截中========");
          HttpServletRequest hrequest = (HttpServletRequest)servletRequest;
          HttpServletResponseWrapper wrapper = new HttpServletResponseWrapper((HttpServletResponse) servletResponse);
          if(hrequest.getRequestURI().indexOf("/index") != -1 ||
                  hrequest.getRequestURI().indexOf("/asd") != -1 ||
                  hrequest.getRequestURI().indexOf("/online") != -1 ||
                  hrequest.getRequestURI().indexOf("/login") != -1
                  ) {
              filterChain.doFilter(servletRequest, servletResponse);
          }else {
              wrapper.sendRedirect("/login");
          }
      }
      /**
       * 容器被銷毀的時候被調(diào)用
       */
      @Override
      public void destroy() {
          System.out.println("攔截器銷毀========攔截器銷毀========");
      }
}

@WebListener
public class RequestListener implements ServletRequestListener {
    @Override
    public void requestDestroyed(ServletRequestEvent sre) {
        // TODO Auto-generated method stub
        System.out.println("======銷毀監(jiān)聽器========");
    }
    @Override
    public void requestInitialized(ServletRequestEvent sre) {
        System.out.println("======進(jìn)入監(jiān)聽器========");
    }

//主攔截器，根據(jù)攔截不同路徑跳轉(zhuǎn)不同自定義攔截器 （實(shí)現(xiàn)WebMvcConfigurer方法）
@Configuration
public class CustomWebMvcConfigurer implements WebMvcConfigurer  {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginIntercepter()).addPathPatterns("/api1/*/**");
        registry.addInterceptor(new TwoIntercepter()).addPathPatterns("/api2/*/**");
        //.excludePathPatterns("/api2/xxx/**"); //攔截全部 /*/*/**
        WebMvcConfigurer.super.addInterceptors(registry);
    }
}

public class LoginIntercepter implements HandlerInterceptor{
    /**
     * 進(jìn)入controller方法之前
     */
    @Override
    public boolean preHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler) throws Exception {
        System.out.println("LoginIntercepter------->preHandle");
//        String token = request.getParameter("access_token");
//        
//        response.getWriter().print("fail");
        return HandlerInterceptor.super.preHandle(request, response, handler);
    }
    /**
     * 調(diào)用完controller之后，視圖渲染之前
     */
    @Override
    public void postHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
        System.out.println("LoginIntercepter------->postHandle");
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }
    /**
     * 整個完成之后，通常用于資源清理
     */
    @Override
    public void afterCompletion(HttpServletRequest request,
            HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        System.out.println("LoginIntercepter------->afterCompletion");
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}