@EnableWebMvc@Configurationstatic class MvcConfigurer implements WebMvcConfigurer {//在攔截器中需要使用這個(gè)bean，如果直接在攔截器中注入的話會(huì)失敗，所以選擇有參構(gòu)造的方式傳入  @Autowired  CacheService cacheService;   @Override  public void addInterceptors(InterceptorRegistry registry) {    //指定攔截器類(lèi)    registry.addInterceptor(new AuthorizationInterceptor(cacheService))    //指定該類(lèi)攔截的url，過(guò)濾掉指定的url    .addPathPatterns("/gw/**").excludePathPatterns("/**/query_token/**");  }}public class AuthorizationInterceptor extends HandlerInterceptorAdapter{//選擇性的重寫(xiě)preHandle postHandle afterCompletion afterConcurrentHandlingStarted方法}

public class AuthorizationInterceptor implements HandlerInterceptor{//重寫(xiě)preHandle postHandle afterCompletion方法default boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)   throws Exception {//請(qǐng)求開(kāi)始執(zhí)行之前執(zhí)行改方法，返回true該請(qǐng)求猜能被繼續(xù)執(zhí)行下去，返回false的話，請(qǐng)求就直接結(jié)束  return true;}public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {//該方法的執(zhí)行時(shí)間是在處理器進(jìn)行處理之后，也就是在Controller的方法調(diào)用之后執(zhí)行，但是它會(huì)在DispatcherServlet進(jìn)行視圖的//渲染之前執(zhí)行，也就是說(shuō)在這個(gè)方法中你可以對(duì)ModelAndView進(jìn)行操作}public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {//該方法將在整個(gè)請(qǐng)求結(jié)束之后，也就是在DispatcherServlet 渲染了對(duì)應(yīng)的視圖之后執(zhí)行。這個(gè)方法的主要作用是用于進(jìn)行資源清理工作的。}}