package com.nxz.filter;import org.springframework.stereotype.Component;import javax.servlet.*;
import java.io.IOException;
import java.util.Date;// Filter 是javax.servlet下的
@Component //让自定义filter起作用，只需要让springcontext管理起来即可
public class TimeFilter implements Filter {@Overridepublic void init(FilterConfig filterConfig) throws ServletException {System.out.println("time filter init");}@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {System.out.println("time filter start");long time = new Date().getTime();filterChain.doFilter(servletRequest, servletResponse);System.out.println("消耗时间：" + (new Date().getTime() - time));System.out.println("time filter start");}@Overridepublic void destroy() {System.out.println("time filter destroy");}
}

time filter start
进入getinfo服务
消耗时间：367
time filter end

package com.nxz.filter;import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;@Configuration
public class WebConfig {@Beanpublic FilterRegistrationBean timeFilter(){FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();TimeFilter timeFilter = new TimeFilter();filterRegistrationBean.setFilter(timeFilter);//指定什么样的请求回走timefilter过滤器filterRegistrationBean.addUrlPatterns("/*");return filterRegistrationBean;}
}

package com.nxz.inteceptor;import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;@Component
public class TimeInteceptor implements HandlerInterceptor {//在controller调用之前调用@Overridepublic boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {System.out.println("preHandler");System.out.println(((HandlerMethod) o).getBean().getClass().getName());//输出类名System.out.println(((HandlerMethod) o).getMethod().getName());//输出方法名//为了在prehandler方法和posthandler方法之间传递信息，可以将数据放到request中httpServletRequest.setAttribute("startTime", new Date().getTime());return false;}//在controller调用之后调用，如果controller中抛出异常，这个方法不会调用@Overridepublic void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {System.out.println("postHandle");Long start = (Long) httpServletRequest.getAttribute("startTime");System.out.println("time interceptor 耗时：" + (new Date().getTime() - start));}//无论controller是否抛出异常，都会调用@Overridepublic void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {System.out.println("afterCompletion");Long start = (Long) httpServletRequest.getAttribute("startTime");System.out.println("time interceptor 耗时：" + (new Date().getTime() - start));System.out.println("ex is :" + e);}
}

package com.nxz.config;import com.nxz.filter.TimeFilter;
import com.nxz.inteceptor.TimeInteceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {@Autowiredprivate TimeInteceptor timeInteceptor;//自定义的interceptor 要起作用的话 需要继承webmvcConfigurerAdater ，重写addInterceptors@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(timeInteceptor);}
}

preHandler
com.nxz.controller.UserController
getInfo
进入getinfo服务
postHandle
time interceptor 耗时：48
afterCompletion
time interceptor 耗时：48
ex is :null

package com.nxz.aspect;import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;import java.util.Date;@Aspect
@Component
public class TimeAspect {//@Before @After @AfterThrowing @Around 基本的aop注解@Around("execution(* com.nxz.controller.UserController.*(..))")public Object handlerControllerMehtod(ProceedingJoinPoint joinPoint) throws Throwable {System.out.println("time aspect start");Object[] args = joinPoint.getArgs();for (Object arg : args) {System.out.println(arg);}Long time = new Date().getTime();Object obj = joinPoint.proceed();System.out.println("time aspect end,耗时：" + (new Date().getTime() - time));return obj;}}

time aspect start
1   --》请求参数
进入getinfo服务
time aspect end,耗时：4

    @GetMapping("/{id:\\d+}")@JsonView(User.UserDetailView.class)public User getInfo(@PathVariable String id) {System.out.println("进入getinfo服务");User user = new User();user.setUsername("tom");return user;}