在同一个切面中定义多个通知响应同一个切点函数，执行顺序为声明顺序

package com.zejian.spring.springAop.AspectJ;

import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

/**
 * Created by zejian on 2017/2/20.
 * Blog : http://blog.csdn.net/javazejian [原文地址,请尊重原创]
 */
@Aspect
public class AspectOne {

    /**
     * Pointcut定义切点函数
     */
    @Pointcut("execution(* com.zejian.spring.springAop.dao.UserDao.deleteUser(..))")
    private void myPointcut(){}

    @Before("myPointcut()")
    public void beforeOne(){
        System.out.println("前置通知....执行顺序1");
    }

    @Before("myPointcut()")
    public void beforeTwo(){
        System.out.println("前置通知....执行顺序2");
    }

    @AfterReturning(value = "myPointcut()")
    public void AfterReturningThree(){
        System.out.println("后置通知....执行顺序3");
    }

    @AfterReturning(value = "myPointcut()")
    public void AfterReturningFour(){
        System.out.println("后置通知....执行顺序4");
    }
}

output====>
前置通知....执行顺序1
前置通知....执行顺序2
delete user......
后置通知....执行顺序3
后置通知....执行顺序4

如果在不同的切面中定义多个通知响应同一个切点，进入时则优先级高的切面类中的通知函数优先执行，退出时则最后执行，如下定义AspectOne类和AspectTwo类并实现org.springframework.core.Ordered 接口，该接口用于控制切面类的优先级，同时重写getOrder方法，定制返回值，返回值(int 类型)越小优先级越大。其中AspectOne返回值为0，AspectTwo的返回值为3，显然AspectOne优先级高于AspectTwo

/**
 * Created by zejian on 2017/2/20.
 * Blog : http://blog.csdn.net/javazejian [原文地址,请尊重原创]
 */
@Aspect
public class AspectOne implements Ordered {

    /**
     * Pointcut定义切点函数
     */
    @Pointcut("execution(* com.zejian.spring.springAop.dao.UserDao.deleteUser(..))")
    private void myPointcut(){}

    @Before("myPointcut()")
    public void beforeOne(){
        System.out.println("前置通知..AspectOne..执行顺序1");
    }

    @Before("myPointcut()")
    public void beforeTwo(){
        System.out.println("前置通知..AspectOne..执行顺序2");
    }

    @AfterReturning(value = "myPointcut()")
    public void AfterReturningThree(){
        System.out.println("后置通知..AspectOne..执行顺序3");
    }

    @AfterReturning(value = "myPointcut()")
    public void AfterReturningFour(){
        System.out.println("后置通知..AspectOne..执行顺序4");
    }

    /**
     * 定义优先级,值越低,优先级越高
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }
}


//切面类 AspectTwo.java
@Aspect
public class AspectTwo implements Ordered {

    /**
     * Pointcut定义切点函数
     */
    @Pointcut("execution(* com.zejian.spring.springAop.dao.UserDao.deleteUser(..))")
    private void myPointcut(){}

    @Before("myPointcut()")
    public void beforeOne(){
        System.out.println("前置通知....执行顺序1--AspectTwo");
    }

    @Before("myPointcut()")
    public void beforeTwo(){
        System.out.println("前置通知....执行顺序2--AspectTwo");
    }

    @AfterReturning(value = "myPointcut()")
    public void AfterReturningThree(){
        System.out.println("后置通知....执行顺序3--AspectTwo");
    }

    @AfterReturning(value = "myPointcut()")
    public void AfterReturningFour(){
        System.out.println("后置通知....执行顺序4--AspectTwo");
    }

    /**
     * 定义优先级,值越低,优先级越高
     * @return
     */
    @Override
    public int getOrder() {
        return 2;
    }
}

output====>
前置通知..AspectOne..执行顺序1
前置通知..AspectOne..执行顺序2
前置通知....执行顺序1--AspectTwo
前置通知....执行顺序2--AspectTwo
delete user ......
后置通知....执行顺序4--AspectTwo
后置通知....执行顺序3--AspectTwo
后置通知..AspectOne..执行顺序4
后置通知..AspectOne..执行顺序3