SpringAOP ---配置命名切点补充

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

    <bean id="boy" class="com.springboot.aop3.Boy"></bean>
    <bean id="girl" class="com.springboot.aop3.Girl"></bean>
    <bean id="buyAspectJ" class="com.springboot.aop3.BuyAspectJ"></bean>
    
    <aop:config proxy-target-class="true">
        <aop:pointcut id="apoint" expression="execution(* com.springboot.aop3.IBuy.buy(..))"></aop:pointcut>
        <aop:aspect id="baj" ref="buyAspectJ">
            <aop:before pointcut-ref="apoint" method="haha"></aop:before>
            <aop:after pointcut-ref="apoint" method="hehe"></aop:after>
            <aop:after-returning pointcut-ref="apoint" method="xixi"></aop:after-returning>
            <aop:around pointcut-ref="apoint" method="xxx"></aop:around>
        </aop:aspect>
    </aop:config>
</beans>

[1]: 　<aop:pointcut>如果位于<aop:aspect>元素中,则命名切点只能被当前<aop:aspect>内定义的元素访问到.为了能被整个<aop:config>元素中定义的所有增强访问,必须在<aop:config>元素下定义切点.

[2]:　如果在<aop:config>元素下直接定义<aop:pointcut>,则必须保证<aop:pointcut>在,aop:aspect>之前定义.在<aop:conofig>下还可以定义<aop:advisor>,三者在<aop:config>中配置有先后顺序的要求:首先是<aop:pointcut>,

其次是<aop:advisor>,最后是<aop:aspect>.而在<aop:aspect>中定义的<aop:pointcut>则没有先后顺序的要求.可以在任何位置定义.

<aop:after-returning pointcut-ref="apoint" method="xixi" returning="retVal"></aop:after-returning>

public void afterReturning(int retVal) {
        
    }

[1]:returning属性必须和增强方法的入参名一致.(代码中绿色“retVal”)

<aop:after-throwing pointcut-ref="apoint" method="afteThrowingMethod" throwing="iae"></aop:after-throwing>

public void afteThrowingMethod(IllegalArgumentException iae) {
        
    }

[1]:通过throwing属性声明需要绑定的异常对象,指定的异常名必须和增强方法对应的入参名一致(代码中深绿色的“iae”)

<aop:before method="bindParam" pointcut="target(com.smart.NativeWaiter) and args(name,num,..)"></aop:before>

public void bindParam(int num,String name){}

[1]bingParam(int num,String name)和代码 args(name,num,..)声明的参数名必须相同.

<aop:config >
    <aop:advisor advice-ref="testAdvice" pointcut="point"/>
</aop:config>
<bean id="testAdvice" class="com.springboot.aop.TestBeforeAdvice"></bean>

各种切面类型混合使用,如图:

 

最后附加一张spring的4种切面定义的对比图片: