第12讲. SpringBoot AOP切面

切面，方法的执行前后，切入代码，

1，新建一个 aspect包，新建RequestAspect类，添加注解，写方法，

对Controller层的public 的任一类返回值的任一类的任意方法的任意参数。

获取logger，

定义切点，

定义方法前执行...(获取访问ip，获取访问路径，获取访问方式，

获取包名，类名，方法名，参数列表)

定义方法后执行...

定义返回值...

package com.cruise.aspect;

import javax.servlet.http.HttpServletRequest;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.jboss.logging.Logger;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import com.cruise.entity.Student;

@Aspect
@Component
public class RequestAspect {

   private Logger logger = Logger.getLogger(RequestAspect.class);

   @Pointcut("execution(public * com.cruise.controller.*.*(..))")
   public void log(){

   }

   @Before("log()")
   public void doBefore(JoinPoint jointPoint){
       logger.info("方法执行前...");
       ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
       HttpServletRequest request = requestAttributes.getRequest();
       logger.infof(request.getRemoteHost());
       logger.infof( request.getRequestURI());
       logger.infof(request.getMethod());

logger.infof(jointPoint.getSignature().getDeclaringTypeName()+"."+

jointPoint.getSignature().getName());

       System.out.println(((Student)jointPoint.getArgs()[0]));
   }
   @After("log()")
   public void doAfter(JoinPoint jointPoint){
       logger.info("方法执行后...");
   }
   @AfterReturning(returning="object",pointcut="log()")
   public void doAfterReturning(Object object){
       logger.info("方法的返回值："+object);
   }

}

2，在Student实体中，加入toString方法，

    @Override
   public String toString() {
       return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
   }

3，查看日eclipse日志测试，

第12讲. SpringBoot AOP切面

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