(三)、SpringBoot 自定义 interceptor(拦截器)

可以前往第一篇博客查看目录结构 --> 这里

一、创建interceptor包



二、在interceptor包下创建TimeInterceptor类,自定义Interceptor@Component
public class TimeInterceptor implements HandlerInterceptor {

@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("interceptor preHandle");
System.out.println(((HandlerMethod)handler).getBean().getClass().getName());
System.out.println(((HandlerMethod)handler).getMethod().getName());
request.setAttribute("start",new Date().getTime());
return true;
}

@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("interceptor postHandle");
}

@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("interceptor afterCompletion");
long start = (long) request.getAttribute("start");
System.out.println("interceptor耗时： " + (new Date().getTime() - start));
}
}
三、在config包下的WebConfig类下添加下述代码，配置自定义的TimeInterceptor进入 @Autowired
private TimeInterceptor timeInterceptor;

@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(timeInterceptor);
}
四、访问 localhost/user ，查看IDEA控制台即可