springboot 实现拦截器权限过滤，以及用拦截器实现操作日志功能

package com.hcmony.web.interceptor;import com.hcmony.service.auth.ValidationService;import com.hcmony.service.auth.impl.ValidationServiceImpl;import org.apache.log4j.Logger;import org.springframework.beans.factory.BeanFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.annotation.Configuration;import org.springframework.web.context.support.WebApplicationContextUtils;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * <h3>权限拦截</h3> * <p></p> * * @author hcmony * @since V1.0.0, 2017/12/15 18:13 */@Configurationpublic class AuthInterceptor extends HandlerInterceptorAdapter {   private final Logger logger                         = Logger.getLogger(AuthInterceptor.class);      @Autowired   private ValidationService validationService; //这个service可以用db或者缓存取数据查询   @Override   public boolean preHandle(HttpServletRequest request, HttpServletResponse response,                      Object handler) throws Exception {      //todo 后面具体实现 此处后面可以做日志操作记录      String token = request.getHeader("token");      if(token==null){         request.getRequestDispatcher("/notLogin").forward(request,response);         return false;      }      //假如无法注入的情况下      if(validationService==null){         BeanFactory factory = WebApplicationContextUtils.getRequiredWebApplicationContext(request.getServletContext());         validationService = (ValidationServiceImpl) factory.getBean("validationServiceImpl");      }
      String user = (String) validationService.verifyAccessToken(token);      if(user==null){         request.getRequestDispatcher("/noAuth").forward(request,response);         return false;      }      return true;   }   @Override   public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,                     ModelAndView modelAndView) throws Exception {      // log.info("在Controller请求处理之后进行调用，但是在视图被渲染之前");   }   @Override   public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,                        Exception ex) throws Exception {      // log.info("在整个请求结束之后被调用，也就是在DispatcherServlet渲染了对应的视图之后执行（主要是用于进行资源清理工作）");   }}