Spring-AOP

学习Spring-AOP时，实现例子有三种方法，我都会放到下面：

 第一种运用Spring中原生 的API实现用到的文件夹有：

 第二种自定义类实现用到的文件夹有：

 第三种：注解方法实现用到的有：

package AOP.diy;

public class PointCut {
    public void before1(){
        System.out.println("******被执行前******");
    }
    public void after1(){
        System.out.println("******被执行后******");
    }
}

package AOP.diy;


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

@Component
@Aspect
public class ZJ_PointCut {


    @Before("execution(* AOP.service.UserServiceImpl.*(..))")
    public void before(){
        System.out.println("执行前——————");
    }
}

package AOP.Log;

import org.springframework.aop.AfterReturningAdvice;

import java.lang.reflect.Method;

public class AfterLog implements AfterReturningAdvice{
    public void afterReturning(Object result, Method method, Object[] objects, Object o1) throws Throwable {
        System.out.println("执行了" + method.getName() +"返回了" + result);
    }
}

package AOP.Log;

import org.springframework.aop.MethodBeforeAdvice;

import java.lang.reflect.Method;

public class beforeLog implements MethodBeforeAdvice {


    public void before(Method method, Object[] objects, Object o) throws Throwable {
        System.out.println(o.getClass().getName() + "的" + method.getName() +"被执行了");
    }
}

package AOP.service;

public interface UserService {
    public void add();
    public void delete();
    public void select();
    public void update();

}

package AOP.service;

public class UserServiceImpl implements UserService{
    public void add() {
        System.out.println("增加了一个用户");
    }

    public void delete() {
        System.out.println("删除了一个用户");
    }

    public void select() {
        System.out.println("查询了一个用户");
    }

    public void update() {
        System.out.println("修改了一个用户");
    }
}

<?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:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <bean id="userService" class="AOP.service.UserServiceImpl"/>
    <bean id="beforelog" class="AOP.Log.beforeLog"/>
    <bean id="afterlog" class="AOP.Log.AfterLog"/>

<!--    方法一：Spring的原生API接口-->
<!--    配置aop-->
<!--   <aop:config>-->
<!--&lt;!&ndash;       expression:表达式，exection(要执行的位置)&ndash;&gt;-->
<!--       <aop:pointcut id="pointcut" expression="execution(* AOP.service.UserServiceImpl.*(..))"/>-->

<!--       <aop:advisor advice-ref="afterlog" pointcut-ref="pointcut"/>-->
<!--       <aop:advisor advice-ref="beforelog" pointcut-ref="pointcut"/>-->
<!--   </aop:config>-->


<!--&lt;!&ndash;    方法二：自定义类&ndash;&gt;-->
       <bean id="diy" class="AOP.diy.PointCut"/>
    <aop:config>
        <aop:aspect ref="diy">
<!--        切入点-->
        <aop:pointcut id="point" expression="execution(* AOP.service.UserServiceImpl.*(..))"/>

<!--        通知-->

            <aop:before method="before1" pointcut-ref="point"/>
            <aop:after method="after1" pointcut-ref="point"/>
        </aop:aspect>
    </aop:config>

<!--方法三：注解实现-->
<!--<bean id="zj_point" class="AOP.diy.ZJ_PointCut"/>-->
<!--    <aop:aspectj-autoproxy/>-->
</beans>

import AOP.service.UserService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyTest {
        @Test
        public void  testAop(){
            ApplicationContext applicationContext  = new ClassPathXmlApplicationContext("AopApplicationContext.xml");
            UserService service = (UserService) applicationContext.getBean("userService");
            service.add();
    }
}