1. 首先要把aop的依賴加進來
  <dependency>  
       <groupId>org.springframework.boot</groupId>  
       <artifactId>spring-boot-starter-aop</artifactId>  
 </dependency>

2. 根據自己的需求，建立相關的切面

package com.example.aop;  
  
import org.aspectj.lang.JoinPoint;  
import org.aspectj.lang.ProceedingJoinPoint;  
import org.aspectj.lang.annotation.*;  
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 wuwf on 17/4/27. 
 * 日誌切面 
 */  
@Aspect  
@Component  
public class LogAspect {  
    @Pointcut("execution(public * com.example.service.*.*(..))")  
    public void webLog(){}  
  
    @Before("webLog()")  
    public void deBefore(JoinPoint joinPoint) throws Throwable {  
        // 接收到請求，記錄請求內容  
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();  
        HttpServletRequest request = attributes.getRequest();  
        // 記錄下請求內容  
        System.out.println("URL : " + request.getRequestURL().toString());  
        System.out.println("HTTP_METHOD : " + request.getMethod());  
        System.out.println("IP : " + request.getRemoteAddr());  
        System.out.println("CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());  
        System.out.println("ARGS : " + Arrays.toString(joinPoint.getArgs()));  
  
    }  
  
    @AfterReturning(returning = "ret", pointcut = "webLog()")  
    public void doAfterReturning(Object ret) throws Throwable {  
        // 處理完請求，返回內容  
        System.out.println("方法的返回值 : " + ret);  
    }  
  
    //後置異常通知  
    @AfterThrowing("webLog()")  
    public void throwss(JoinPoint jp){  
        System.out.println("方法異常時執行.....");  
    }  
  
    //後置最終通知,final增強，不管是丟擲異常或者正常退出都會執行  
    @After("webLog()")  
    public void after(JoinPoint jp){  
        System.out.println("方法最後執行.....");  
    }  
  
    //環繞通知,環繞增強，相當於MethodInterceptor  
    @Around("webLog()")  
    public Object arround(ProceedingJoinPoint pjp) {  
        System.out.println("方法環繞start.....");  
        try {  
            Object o =  pjp.proceed();  
            System.out.println("方法環繞proceed，結果是 :" + o);  
            return o;  
        } catch (Throwable e) {  
            e.printStackTrace();  
            return null;  
        }  
    }  
}