spring的filter前标、interception坠韩、aop對比
filter
在spring boot中定義filter實現(xiàn)filter方法。filter方法能夠拿到執(zhí)行的request和response,獲取不到具體執(zhí)行的controller
//@Component
public class TimeFilter implements Filter {
/* (non-Javadoc)
* @see javax.servlet.Filter#destroy()
*/
@Override
public void destroy() {
System.out.println("time filter destroy");
}
/* (non-Javadoc)
* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
*/
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
System.out.println("time filter start");
long start = new Date().getTime();
chain.doFilter(request, response);
System.out.println("time filter 耗時:"+ (new Date().getTime() - start));
System.out.println("time filter finish");
}
/* (non-Javadoc)
* @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
*/
@Override
public void init(FilterConfig arg0) throws ServletException {
System.out.println("time filter init");
}
}
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
@SuppressWarnings("unused")
@Autowired
private TimeInterceptor timeInterceptor;
@Override
public void addInterceptors(InterceptorRegistry registry) {
// registry.addInterceptor(timeInterceptor);
}
// @Bean
public FilterRegistrationBean timeFilter() {
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
TimeFilter timeFilter = new TimeFilter();
registrationBean.setFilter(timeFilter);
// 指定哪些路徑起作用
List<String> urls = new ArrayList<>();
urls.add("/*");
registrationBean.setUrlPatterns(urls);
return registrationBean;
}
}
interception
spring boot中定義interception需要實現(xiàn)HandlerInterceptor炼列,interception能夠拿到具體是哪個方法執(zhí)行的和requset只搁、response。但是拿不到具體方法中的參數(shù)俭尖。
@Component
public class TimeInterceptor implements HandlerInterceptor {
/* (non-Javadoc)
* @see org.springframework.web.servlet.HandlerInterceptor#preHandle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.Object)
*/
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
System.out.println("preHandle");
System.out.println(((HandlerMethod)handler).getBean().getClass().getName());
System.out.println(((HandlerMethod)handler).getMethod().getName());
request.setAttribute("startTime", new Date().getTime());
//返回的bool值氢惋,決定是否后面的方法是否執(zhí)行
return true;
}
/* (non-Javadoc)
* @see org.springframework.web.servlet.HandlerInterceptor#postHandle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.Object, org.springframework.web.servlet.ModelAndView)
*/
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
System.out.println("postHandle");
Long start = (Long) request.getAttribute("startTime");
System.out.println("time interceptor 耗時:"+ (new Date().getTime() - start));
}
/* (non-Javadoc)
* @see org.springframework.web.servlet.HandlerInterceptor#afterCompletion(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.Object, java.lang.Exception)
*/
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
System.out.println("afterCompletion");
Long start = (Long) request.getAttribute("startTime");
System.out.println("time interceptor 耗時:"+ (new Date().getTime() - start));
System.out.println("ex is "+ex);
}
}
aop
spring中定義aop需要指定切點洞翩,和執(zhí)行邏輯。能夠拿到具體方法的參數(shù)。但是獲取不到request和response
//@Aspect
//@Component
public class TimeAspect {
//@Before()
//@After()
@Around("execution(* com.imooc.web.controller.UserController.*(..))")
public Object handleControllerMethod(ProceedingJoinPoint pjp) throws Throwable {
System.out.println("time aspect start");
Object[] args = pjp.getArgs();
for (Object arg : args) {
System.out.println("arg is "+arg);
}
long start = new Date().getTime();
Object object = pjp.proceed();
System.out.println("time aspect 耗時:"+ (new Date().getTime() - start));
System.out.println("time aspect end");
return object;
}
}
總結
filter:filter方法能夠拿到執(zhí)行的request和response,獲取不到具體執(zhí)行的controller
interception:interception能夠拿到具體是哪個方法執(zhí)行的和requset、response顷霹。但是拿不到具體方法中的參數(shù)。
Aop:能夠拿到具體方法的參數(shù),獲取不到requset来屠、response
他們之間執(zhí)行的順序:filter-> interception->@Around aop->具體執(zhí)行的方法->產(chǎn)生異常->@Around aop->@ControllerAdvice 全局異常處理-> interception-> filter