AOP处理请求

这里以AOP处理HTTP请求并记录log为例
在pom文件里，加入aop的dependency

    org.springframework.boot
    spring-boot-starter-aop

然后新建一个名为HttpAspect的类，在class上加上@Aspect和@Component注解。

package com.zfu.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;

@Aspect
@Component
public class HttpAspect {

    private static final Logger logger = LoggerFactory.getLogger(HttpAspect.class);

    @Pointcut("execution(public * com.zfu.controller.GirlController.*(..))")
    public void log() {
    }

    @Before("log()")
    public void doBefore(JoinPoint joinPoint) {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        logger.info("url={}", request.getRequestURL());
        logger.info("method={}", request.getMethod());
        logger.info("ip={}", request.getRemoteAddr());
        logger.info("class_method={}", joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
        logger.info("args={}", joinPoint.getArgs());
    }

    @After("log()")
    public void doAfter() {
        logger.info("This is a message after execution");
    }

    @AfterReturning(returning = "object", pointcut = "log()")
    public void doAfterReturning(Object object) {
        logger.info("returning={}", object);
    }
}