Springboot整合AOP

1.添加依赖

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

2.定义切面类，实现web层的日志切面

要想把一个类变成切面类，需要两步，
① 在类上使用 @Component 注解 把切面类加入到IOC容器中
② 在类上使用 @Aspect 注解 使之成为切面类

package com.example.aop;

import org.aspectj.lang.JoinPoint;
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.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;
import java.util.Arrays;

/**
 * Created by lmb on 2018/9/5.
 */
@Aspect
@Component
public class WebLogAcpect {

    private Logger logger = LoggerFactory.getLogger(WebLogAcpect.class);

    /**
     * 定义切入点，切入点为com.example.aop下的所有函数
     */
    @Pointcut("execution(public * com.example.aop..*.*(..))")
    public void webLog(){}

    /**
     * 前置通知：在连接点之前执行的通知
     * @param joinPoint
     * @throws Throwable
     */
    @Before("webLog()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        // 接收到请求，记录请求内容
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        // 记录下请求内容
        logger.info("URL : " + request.getRequestURL().toString());
        logger.info("HTTP_METHOD : " + request.getMethod());
        logger.info("IP : " + request.getRemoteAddr());
        logger.info("CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
        logger.info("ARGS : " + Arrays.toString(joinPoint.getArgs()));
    }

    @AfterReturning(returning = "ret",pointcut = "webLog()")
    public void doAfterReturning(Object ret) throws Throwable {
        // 处理完请求，返回内容
        logger.info("RESPONSE : " + ret);
    }
}

参考文献：
https://blog.csdn.net/lmb55/article/details/82470388/
https://www.cnblogs.com/wangshen31/p/9379197.html
https://www.cnblogs.com/chaoesha/p/13037368.html