aop面向切面编程的实现

aop主要用于日志记录，跟踪，优化和监控

下面是来自慕课网学习的一些案例，复制黏贴就完事了，注意类和方法的位置

pom添加依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

package com.tx.gelv.aspect;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * @author:hgt
 * @version:1.0
 * @date:2020/5/14
 * @description:com.tx.gelv.aspect
 * aop 面向切面编程
 */

/**
 * @Component
 * 引入到spring容器内
 */
@Aspect
@Component
public class HttpAspect {

//    /**
//     * **********************type1*******************************************
//     */
//    //对方法和类进行拦截，在目标运行之前
//    @Before("execution(public * com.tx.gelv.controller.Test.index(..))")
//    public void beforelogs(){
//        System.out.println("1111");
//    }
//
//    //对方法和类进行拦截，在目标运行之后
//    @After("execution(public * com.tx.gelv.controller.Test.index(..))")
//    public void afterlogs(){
//        System.out.println("2222");
//    }

    /**
     * ***************************type2**********************************
     */
    //自带日志log4j
    private final static Logger logger = LoggerFactory.getLogger(HttpAspect.class);
    @Pointcut("execution(public * com.tx.gelv.controller.Test.*(..))")
    public void log(){

    }
    @Before("log()")
    public void before(JoinPoint joinPoint){
        logger.info("***********aspect********before*************start***************");
        ServletRequestAttributes attributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();
        //url
        logger.info("url={}",request.getRequestURL());
        //method
        logger.info("method={}",request.getMethod());
        //ip
        logger.info("ip={}",request.getRemoteAddr());
        //类方法
        logger.info("class-method={}",joinPoint.getSignature().getDeclaringTypeName()+"."+joinPoint.getSignature().getName());
        //参数
        logger.info("args:{}",joinPoint.getArgs());
        logger.info("***********aspect********before**********stop*******************");

    }
    @After("log()")
    public void after(){
        logger.info("22222222");
    }

    /**
     * 用于返回对象信息
     * @param object
     */
    @AfterReturning(returning = "object",pointcut = "log()")
    public void doAfterReturning(Object object){
        logger.info("response={}",object);
    }

}

实现图片：

后续将持续更新