RESTful API的拦截
三种拦截方式
1.过滤器(Filter)
1)implement Filter
2-1)自定义的filter可以使用component交给spring管理,从而让filter起作用,所有的url都会经过这个
过滤器
2-2)使用第三方的filter可以通过下面的方式去进行:
@Configuration
public class WebConfig{
@Bean
public FilterRegistrationBean timeFilter() {
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
TimeFilter timeFilter = new TimeFilter();
registrationBean.setFilter(timeFilter);
List<String> urls = new ArrayList<>();
urls.add("/*");//过滤器只拦截指定的url
registrationBean.setUrlPatterns(urls);
return registrationBean;
}
}
2.拦截器(Interceptor)
1)
@Component
public class TimeInterceptor implements HandlerInterceptor{}
2)
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
@Autowired
private TimeInterceptor timeInterceptor;
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(timeInterceptor);
}
}
3.切片(Aspect)
@Aspect
@Component
public class TimeAspect {
@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 耗时:"+ (new Date().getTime() - start));
System.out.println("time aspect end");
return object;
}
}
过滤器可以拿到原始http请求和响应信息,但是拿不到真正处理这个请求的方法的信息;
拦截器可以拿到原始http请求和响应信息,也可以拿到真正处理这个请求的方法的信息,但是拿不到方法被真正调用的时候的参数传递的值;
切片可以拿到方法被真正调用的时候的参数传递的值。但是拿不到原始http请求和响应信息。
拦截顺序
controllerAdvice是处理异常的