记录springboot的Aop操作

1.在pom.xml添加aop依赖

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

2.定义切面类

a.@Aspect将其定义为切面
b.@Component让spring可以ioc操作
c.@Pointcut定义切点
d.@Before,@After等等定义通知

package com.cwh.webProject.Aspect;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class LogAspect {
    
    @Pointcut("execution(public * com.cwh.webProject.controller.userController.*(..))")
    public void webLog() {}
    
    @Before("webLog()")
    public void doBefore() {
        System.out.println("在方法调用前输出");
    }
    
    @AfterReturning(returning="ret",pointcut="webLog()")
    public void afterReturning(Object ret) {
        System.out.println("方法返回的结果+"+ ret);
    }
    
    @After("webLog()")
    public void doAfter() {
        System.out.println("在方法介绍后调用");
    }
    
    @AfterThrowing("webLog()")
    public void doThrow(){
        System.out.println("在抛出异常后输出");
    }
    
    @Around("webLog()")
    public Object doRround(ProceedingJoinPoint pjp) {
        System.out.println("环绕方法开始");
        try {
            Object o = pjp.proceed();
            System.out.println("方法环绕proceed，结果是 :" + o);
            return o;
        } catch (Throwable e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return null;
        }
    }

}

3.测试

image.png

4.详情参考地址

a.http://ju.outofmemory.cn/entry/342084
b.https://www.cnblogs.com/onlymate/p/9605165.html