springboot面向切面，切入日志

1.前台调用后台controller的方法，打印掉用的url和Ip，返回结果，方便定位问题。

2.可以写一个类切面，搞定每次访问controller方法

package com.edu.util;

import javax.servlet.http.HttpServletRequest;
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 com.fasterxml.jackson.databind.ObjectMapper;

@Aspect
@Component
public class WebLogAspect {
private Logger logger = LoggerFactory.getLogger(getClass());
private ObjectMapper mapper = new ObjectMapper();

@Pointcut("execution(public * com.edu.controller..*.*(..))")
public void webLog() {
}

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