AspectJ环绕通知

AspectJ的好处是可以将所有的通知写到一个类中，二schema-based需要不同的类实现不同的接口
例如

public class MyAdvice {
	public void beforeMethod() {
		System.out.println("before");
	}
	public void afterMethod() {
		System.out.println("after");
	}
	public void after_returning_Method() {
		System.out.println("after_returning");
	}
	public void throwMethod() {
		System.out.println("throw");
	}
	public Object aroundMethod(ProceedingJoinPoint pj) throws Throwable{
		System.out.println("around before");
		Object result = pj.proceed();
		System.out.println("around after");
		return result;
	}
}

配置xml

<bean id="demo" class="com.lee.service.DemoService"/>
<bean id="myadvice" class="com.lee.advice.MyAdvice"/>
<aop:config>
	<aop:pointcut expression="execution(* com.lee.service.*.*(..))" id="mypoint"/>
	<aop:aspect ref="myadvice">
		<aop:before method="beforeMethod" pointcut-ref="mypoint"/>
		<aop:after-returning method="after_returning_Method" pointcut-ref="mypoint"/>
		<aop:after method="afterMethod" pointcut-ref="mypoint"/>
		<aop:around method="aroundMethod" pointcut-ref="mypoint"/>
		<aop:after-throwing method="throwMethod" pointcut-ref="mypoint"/>
	</aop:aspect>
</aop:config>

切点类

public class DemoService {
	public void demoMethod() {
		//int i = 5/0;
		System.out.println("DemoMethod execute");
	}
}

当切点没有错误时，结果如下

before
around before
DemoMethod execute
around after
after
after_returning

当有错误时

before
around before
throw
after
Exception in thread "main" java.lang.ArithmeticException: / by zero

可见当有没有错误，<aop:after/>标签始终执行