pointcut 案例配置

package cn.itcast.spring.aop.aspectj;import org.aspectj.lang.JoinPoint;import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.AfterThrowing;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.DeclareParents;import org.aspectj.lang.annotation.Pointcut;/** * 观众 */@Aspectpublic class Audience {/** * 引入通知, */@DeclareParents(value="cn.itcast.spring.aop.aspectj.Singer",defaultImpl=ModifyDateImpl.class)private ModifyDate md ;/** * 定义在切入点 */@Pointcut("execution(* cn.itcast.spring.aop.aspectj.Performer.*(..))")public void perform(){}/** * 坐好 */@Before(value="perform()")public void takeSeat(){System.out.println("takeSeat");}/** * 关机 */@Before(value="perform()")public void turnOffCellphone(JoinPoint jp){System.out.println(jp.getSignature().getName());System.out.println(jp.getArgs());System.out.println(jp.getTarget());System.out.println(jp.getThis());System.out.println("turnOffCellphone");}/** * returning:指定哪个参数接受方法的返回值 */@AfterReturning(pointcut="perform()",returning="ret")public void applaud(Object ret){System.out.println("applaud");System.out.println("ret = " + ret);}/** * 退票 * throwing:指定哪个参数接受异常信息 */@AfterThrowing(pointcut="perform()",throwing="e")public void demandMoney(Exception e){System.out.println("demandMoney");System.out.println("出事了 " + e.getMessage());}@After("perform()")public void goHome(){System.out.println("goHome");}}