spring 2.0 aop编程(一)

在spring2.0中，aop发生了很大的变化：
主要分为两大方面
1.支持简单的aop xml配置
2.支持@AspectJ的注释

先来看一看第一种情况：
申明一个aspect，在xml中的申明如下：

<aop:config>
<aop:aspect id="myAspect" ref="aBean">
...
</aop:aspect>
</aop:config>

<bean id="aBean" class="...">
...
</bean>

申明pointcut

<aop:config>
<aop:pointcut id="businessService"
expression="execution(* com.xyz.myapp.service.*.*(..))"/>
</aop:config>

申明advice

Before advice：
<aop:aspect id="beforeExample" ref="aBean">
<aop:before
pointcut-ref="dataAccessOperation"
method="doAccessCheck"/>
</aop:aspect>
After returning advice:
<aop:aspect id="afterReturningExample" ref="aBean">

<aop:after-returning
pointcut-ref="dataAccessOperation"
method="doAccessCheck"/>

...

</aop:aspect>
或者带有返回参数
<aop:aspect id="afterReturningExample" ref="aBean">

<aop:after-returning
pointcut-ref="dataAccessOperation"
returning="retVal"
method="doAccessCheck"/>

...

</aop:aspect>

After throwing advice：
<aop:aspect id="afterThrowingExample" ref="aBean">

<aop:after-throwing
pointcut-ref="dataAccessOperation"
method="doRecoveryActions"/>

...

</aop:aspect>
或者带有throwing
<aop:aspect id="afterThrowingExample" ref="aBean">

<aop:after-throwing
pointcut-ref="dataAccessOperation"
throwing="dataAccessEx"
method="doRecoveryActions"/>

...

</aop:aspect>
After (finally) advice：
<aop:aspect id="afterFinallyExample" ref="aBean">

<aop:after
pointcut-ref="dataAccessOperation"
method="doReleaseLock"/>

...

</aop:aspect>
Around advice：
<aop:aspect id="aroundExample" ref="aBean">

<aop:around
pointcut-ref="businessService"
method="doBasicProfiling"/>

...

</aop:aspect>
Advice parameters：
<aop:before
pointcut="Pointcuts.anyPublicMethod() and @annotation(auditable)"
method="audit"
arg-names="auditable"/>

对于引入接口（
<aop:aspect id="usageTrackerAspect" ref="usageTracking">
<aop:declare-parents
types-matching="com.xzy.myapp.service.*+",
implement-inter
default-impl=" service.tracking.DefaultUsageTracked"/>
<aop:before
pointcut="com.xyz.myapp.SystemArchitecture.businessService()
and this(usageTracked)"
method="recordUsage"/>
</aop:aspect>

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Introductions）：