spring3: Aspectj后置返回通知
Aspectj后置返回通知
接口:
package chapter1.server; public interface IHelloService2 { public int sayAfterReturning(String param); }
接口实现
package chapter1.service.impl; import chapter1.server.IHelloService2; public class HelloService2 implements IHelloService2 { public int sayAfterReturning(String param) { // TODO Auto-generated method stub System.out.println("============ say after returning:" + param); return 1; } }
配置:
一定要加:<aop:aspectj-autoproxy/> 启动对Aspectj的支持
<aop:aspectj-autoproxy/> <bean id="helloService" class="chapter1.service.impl.HelloService2" /> <bean id="aspect" class="chapter1.aop.HelloAspect2"/>
AOP切面:
一定要引入:org.aspectj.lang.annotation.Aspect; 否则不执行
package chapter1.aop; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Pointcut; import org.aspectj.lang.annotation.AfterReturning; @Aspect public class HelloAspect2 { //方法一 //通知 @AfterReturning( //value="execution(* chapter1..*.sayAdvisorBefore(java.lang.String)) and args(param)", value="execution(* chapter1..*.sayAfterReturning(..))", argNames="retVal", returning="retVal") public void afterReturningAdvice(Object retVal) { System.out.println("================= return after advice : " + retVal); } //方法二 //定义切入点 @Pointcut(value="execution(* chapter1..*.sayAfterReturning(java.lang.String) and args(param))", argNames="param") public void returnPointcut(String param) {} public void afterReturningAdvice2(Object retVal) { } }
测试程序:
@Test public void testAspectAfterReturning() { ApplicationContext context = new ClassPathXmlApplicationContext("chapter1/aspectj2.xml"); IHelloService2 hello = context.getBean("helloService", IHelloService2.class); hello.sayAfterReturning("hahah"); }
结果:
============ say after returning:hahah
================= return after advice : 1