拦截请求并记录相应信息-springboot

方式：

一、FIlter过滤器

二、interceptor拦截器

三、Aspect切片

 

1、Filter过滤器形式

　　只能处理request中的数据  不能肯定请求要走的是哪一个controller信息

一、过滤器实现第一种方式

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起做用，只须要让springcontext管理起来便可
public class TimeFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { System.out.println("time filter init"); } @Override public 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"); } @Override public void destroy() { System.out.println("time filter destroy"); } }

当项目启动的时候会在控制台输出：time filter init

当访问localhost:8080/user/1时：进入拦截器

结束结束后：

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

 

二、filter过滤器第二种方式

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 { @Bean public 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; } }

 

 

2、inteceptor拦截器

　　只能处理到类中的方法，可是不能记录方法的参数是什么

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调用以前调用
 @Override public 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，能够将数据放到request中
        httpServletRequest.setAttribute("startTime", new Date().getTime()); return false; } //在controller调用以后调用，若是controller中抛出异常，这个方法不会调用
 @Override public 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)); } //不管controller是否抛出异常，都会调用
 @Override public 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); } }

interceptor实现拦截功能还须要配置webconfig

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 { @Autowired private TimeInteceptor timeInteceptor; //自定义的interceptor 要起做用的话 须要继承webmvcConfigurerAdater ，重写addInterceptors
 @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(timeInteceptor); } }

访问localhost:8080/user/1后，输入日志：

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

 

 3、切片Aspect（AOP）  -- 切入点（注解）、加强（方法）

　　须要导入aop依赖

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; } }

访问地址后：

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

 

 几种方式起做用的顺序：

 

 

====

 Usercontroller：

@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; }