Spring-AOP-增强类优先级-@Order注解

有多个增强类对同一个方法进行增强，使用@Order注解设置增强类优先级

（1）在增强类上面添加注解@Order(数字类型值)，数字类型值越小优先级越高

1、被增强类

package com.orzjiangxiaoyu.aop.test2;

import org.springframework.stereotype.Component;

/**
 * @author orz
 * @create 2020-08-17 22:53
 */
@Component
public class Person {
    public void add()
    {
        System.out.println("Person add...");
    }
}

2、增强类一

package com.orzjiangxiaoyu.aop.test2;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

/**
 * @author orz
 * @create 2020-08-17 22:54
 */
@Component
@Aspect
@Order(5)
public class PersonPonxy1 {
    @Before(value = "execution(* com.orzjiangxiaoyu.aop.test2.Person.add() )")
    public void before()
    {
        System.out.println("PersonPonxy1 add...");
    }
}

3、增强类二

package com.orzjiangxiaoyu.aop.test2;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

/**
 * @author orz
 * @create 2020-08-17 22:56
 */
@Component
@Aspect
@Order(1)
public class PersonPonxy2 {
    @Before(value = "execution(* com.orzjiangxiaoyu.aop.test2.Person.add() )")
    public void before()
    {
        System.out.println("PersonPonxy2 add...");
    }

}

4、配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/aop
                           http://www.springframework.org/schema/aop/spring-aop.xsd
                           http://www.springframework.org/schema/context
                           http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 开始组件扫面   -->
    <!-- 1.如果扫描多个包，多个包使用逗号隔开
         2.扫描包上层目录
     -->
    <context:component-scan base-package="com.orzjiangxiaoyu.aop"></context:component-scan>
    <!--开启Aspect生成代理对象-->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>

5、测试

package com.orzjiangxiaoyu.aop.test2;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @author orz
 * @create 2020-08-17 20:03
 */
public class Test1 {
    
    @Test
    public void test2()
    {
        ApplicationContext context=new ClassPathXmlApplicationContext("bean2.xml");
        Person person = context.getBean("person",Person.class);
        person.add();
    }
}

6、结果

PersonPonxy2 add...
PersonPonxy1 add...
Person add...