Rumah > Soal Jawab > teks badan
Bean类:
package aop.schema.advice.biz;
public class AspectBiz {
public void biz() {
System.out.println("AspectBiz biz.");
throw new RuntimeException();
}
}
Aspect类:
package aop.schema.advice;
import org.aspectj.lang.ProceedingJoinPoint;
public class MoocAspect {
public void before() {
System.out.println("MoocAspect before.");
}
public void afterReturning() {
System.out.println("MoocAspect afterReturning.");
}
public void afterThrowing() {
System.out.println("MoocAspect afterThrowing.");
}
public void after() {
System.out.println("MoocAspect after.");
}
public Object around(ProceedingJoinPoint pjp) {
Object obj = null;
try {
System.out.println("MoocAspect around 1.");
obj = pjp.proceed();
System.out.println("MoocAspect around 2.");
} catch (Throwable e) {
// e.printStackTrace();
}
return obj;
}
}
配置文件:
<?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
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
<bean id="moocAspect" class="aop.schema.advice.MoocAspect"></bean>
<bean id="aspectBiz" class="aop.schema.advice.biz.AspectBiz"></bean>
<bean id="myBiz" class="aop.schema.advice.biz.MyBiz"></bean>
<aop:config>
<aop:aspect id="moocAspectAOP" ref="moocAspect">
<aop:pointcut id="moocPointcut" expression="execution(* aop.schema.advice.biz.*Biz.*(..))"/>
<aop:before method="before" pointcut-ref="moocPointcut"/>
<aop:after-returning method="afterReturning" pointcut-ref="moocPointcut"/>
<aop:after-throwing method="afterThrowing" pointcut-ref="moocPointcut"/>
<aop:after method="after" pointcut-ref="moocPointcut"/>
<aop:around method="around" pointcut-ref="moocPointcut"/>
</aop:aspect>
</aop:config>
</beans>
测试类:
package aop;
import aop.schema.advice.Fit;
import aop.schema.advice.biz.AspectBiz;
import base.UnitTestBase;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.BlockJUnit4ClassRunner;
@RunWith(BlockJUnit4ClassRunner.class)
public class TestAOPSchemaAdvice extends UnitTestBase {
public TestAOPSchemaAdvice() {
super("classpath:spring-aop-schema-advice.xml");
}
@Test
public void testBiz() {
AspectBiz biz = super.getBean("aspectBiz");
biz.biz();
}
}
现在的问题是:
按理说AspectBiz在执行biz()时抛出异常,afterThrowing()应该执行,然而当5个advice全开时testBiz()的执行结果是:
MoocAspect before.
MoocAspect around 1.
AspectBiz biz.
MoocAspect after.
MoocAspect afterReturning.
结果显示afterThrowing()并没有执行,执行的是afterReturning()。
更神奇的是,如果我注释掉before这个advice,再次运行testBiz()的结果是:
MoocAspect around 1.
AspectBiz biz.
MoocAspect afterThrowing.
MoocAspect after.
这下正常了。
为什么会这样呢?为什么before advice会影响到after-throwing advice的执行呢?
和SpringAOP对advice的织入方式有关吗?那么SpringAOP的织入方式又是什么样的呢?