在xml中
<?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: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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<bean id="helloWorldService" class="cn.javass.spring.chapter6.service.impl.HelloWorldService"/>
<bean id="aspect" class="cn.javass.spring.chapter6.aop.HelloWorldAspect"/>
<bean id="beforeAdvice" class="cn.javass.spring.chapter6.aop.BeforeAdviceImpl"/>
<aop:config>
<aop:advisor pointcut="execution(* cn.javass..*.sayAdvisorBefore(..))"
advice-ref="beforeAdvice"/>
<aop:aspect ref="aspect">
<aop:before pointcut="execution(* cn.javass..*.sayBefore(..)) and args(param)"
method="beforeAdvice(java.lang.String)"
arg-names="param"/>
<aop:after-returning pointcut="execution(* cn.javass..*.sayAfterReturning(..))"
method="afterReturningAdvice"
arg-names="retVal"
returning="retVal"/>
<aop:after-throwing pointcut="execution(* cn.javass..*.sayAfterThrowing(..))"
method="afterThrowingAdvice"
arg-names="exception"
throwing="exception"/>
<aop:after pointcut="execution(* cn.javass..*.sayAfterFinally(..))"
method="afterFinallyAdvice"/>
<aop:around pointcut="execution(* cn.javass..*.sayAround(..))"
method="aroundAdvice"/>
<aop:declare-parents types-matching="cn.javass..*.IHelloWorldService+"
implement-interface="cn.javass.spring.chapter6.service.IIntroductionService"
default-impl="cn.javass.spring.chapter6.service.impl.IntroductiondService"/>
</aop:aspect>
</aop:config>
</beans>
java中例子1
@Test
public void testSchemaBeforeAdvice() {
System.out.println("======================================");
ApplicationContext ctx = new ClassPathXmlApplicationContext("chapter6/advice.xml");
IHelloWorldService helloworldService = ctx.getBean("helloWorldService", IHelloWorldService.class);
helloworldService.sayBefore("before");
System.out.println("======================================");
}
例子2
@Test
public void testSchemaAdvisor() {
System.out.println("======================================");
ApplicationContext ctx = new ClassPathXmlApplicationContext("chapter6/advice.xml");
IHelloWorldService helloworldService = ctx.getBean("helloWorldService", IHelloWorldService.class);
helloworldService.sayAdvisorBefore("haha");
System.out.println("======================================");
}
这里说明一下
所以“<aop:aspect>”实际上是定义横切逻辑，就是在连接点上做什么，“<aop:advisor>”则定义了在哪些连接点应用什么<aop:aspect>。Spring这样做的好处就是可以让多个横切逻辑（即<aop:aspect>定义的）多次使用，提供可重用性。