aop

        <!-- springboot-aop包,AOP切面注解,Aspectd等相关注解 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>


package com.zy.ds;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;


/**
* 自定义注解 + AOP的方式实现日志记录
* Created by linmz on 2020-05-12.
*/
@Aspect
@Component
public class OperateLogAspect {

    @Pointcut("execution(* com.zy.controller.UserCtr.*(..))")
    public void log(){}
@Before("log()")
    public void beforeSwitchDS(JoinPoint point){
        //获得当前访问的class
        Class<?> className = point.getTarget().getClass();
        //获得访问的方法名
        String methodName = point.getSignature().getName();
        //得到方法的参数的类型
        Class[] argClass = ((MethodSignature)point.getSignature()).getParameterTypes();
        String dataSource = DataSourceContextHolder.DEFAULT_DS;
        try {
            // 得到访问的方法对象
            Method method = className.getMethod(methodName, argClass);
            // 判断是否存在@DS注解
            if (method.isAnnotationPresent(DS.class)) {
               //
               
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
   
    @After(value = "log()", returning="returnValue")
    public void afterSwitchDS(JoinPoint point, Object returnValue){
        String jsonStr = returnValue == null ? "": returnValue.toString();
        JSONObject jsonObj = JSONObject.parseObject(jsonStr);
       
    }

}