springboot aspect中@Pointcut 和@Around是什么

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

package com.ysma.webconfig.filter;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.ysma.entity.EsLogDto;
import com.ysma.exception.CustomException;
import com.ysma.intf.EsLog;
import com.ysma.util.SnowFlake;
import org.apache.commons.lang3.time.StopWatch;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Aspect
@Component
public class LogAspect {

    //定义ES日志
    private static final Logger LOGGER = LoggerFactory.getLogger("RES_REQ_LOG_ES_APPENDER");

    //定义表达式 此处使用within  特别注意esLog不用全路径 因为此处它是个参数
    private final String POINT_CUT = "within(com.ysma.appliaction.service..*) && @annotation(esLog)";

    //定义pointcut  pj不用管，默认必须且为第一位
    @Pointcut(value = POINT_CUT)
    public void pointCut(EsLog esLog){}

    //需与pointCut同，  argNames可去除
    @Around(value = "pointCut(esLog)", argNames = "pj, esLog")
    public Object around(ProceedingJoinPoint pj, EsLog esLog) throws Throwable {
        StopWatch sw = StopWatch.createStarted();
        EsLogDto dto = null;
        try {
            Object obj = pj.proceed();
            if(esLog.available()){
                dto = wrap(pj.getArgs(), esLog, obj);
            }
            return obj;
        } catch (Throwable ex) {
            if(esLog.available()){
                dto = wrap(pj.getArgs(), esLog, ex);
            }
            throw ex;
        } finally {
            sw.stop();
            if(dto != null){
                dto.setCostTime(sw.getTime(TimeUnit.MILLISECONDS));
                dto.setAddTime(new Date());
                LOGGER.info(dto.toString());
            }
        }
    }

    private EsLogDto wrap(Object[] args, EsLog esLog, Object... objs) {
        EsLogDto eld = new EsLogDto();
        switch (esLog.source()){
            case XFXJ: {
                String apiCode = (String)args[0];
                eld.setApiCode(apiCode);


                String apiParam = (String)args[1];
                eld.setReq(apiParam);
                JSONObject obJson = JSON.parseObject(apiParam);

                String id = obJson.getString("applySerialNo");
                if(id != null){
                    eld.setId(id);
                } else {
                    //备用雪花算法
                    eld.setId(SnowFlake.getInstance().nextId());
                }

                Object obj = objs[0];
                if(obj instanceof CustomException){//定制异常
                    CustomException ce = (CustomException)obj;
                    eld.setErrorCode(ce.getErrorCode());
                    eld.setErrorMsg(ce.getMessage());
                } else if(obj instanceof Exception){//运行时异常
                    Exception ex = (Exception)obj;
                    eld.setErrorCode(HttpStatus.INTERNAL_SERVER_ERROR.value());
                    eld.setErrorMsg(ex.getMessage());
                } else {//无异常
                    eld.setRes(obj.toString());
                }
            }
                break;
            case H5://TODO 待扩展
            default:
                break;
        }


        return eld;
    }
}