Spring4（4）——AOP面向切面

<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.xsd"> 

<bean id="studentServiceAspect" class="com.java1234.advice.StudentServiceAspect"></bean>

<bean id="studentService" class="com.java1234.service.impl.StudentServiceImpl"></bean>

<aop:config>
    <aop:aspect id="studentServiceAspect" ref="studentServiceAspect">
        <aop:pointcut expression="execution(* com.java1234.service.*.*(..))" id="businessService"/>
        <aop:before method="doBefore" pointcut-ref="businessService"/>
        <aop:after method="doAfter" pointcut-ref="businessService"/>
        <aop:around method="doAround" pointcut-ref="businessService"/>
        <aop:after-returning method="doAfterReturning" pointcut-ref="businessService"/>
        <aop:after-throwing method="doAfterThrowing" pointcut-ref="businessService" throwing="ex"/>
    </aop:aspect> 
</aop:config>

public class StudentServiceAspect {

　　// 前置通知
    public void doBefore(JoinPoint jp){
        System.out.println("类名:"+jp.getTarget().getClass().getName());
        System.out.println("方法名："+jp.getSignature().getName());
        System.out.println("开始添加学生："+jp.getArgs()[0]);
    }
    
　　//后置通知
    public void doAfter(JoinPoint jp){
        System.out.println("类名:"+jp.getTarget().getClass().getName());
        System.out.println("方法名："+jp.getSignature().getName());
        System.out.println("学生添加完成："+jp.getArgs()[0]);
    }
    
　　//环绕通知
    public Object doAround(ProceedingJoinPoint pjp) throws Throwable{
        System.out.println("添加学生前");
        Object retVal=pjp.proceed();
        System.out.println(retVal);
        System.out.println("添加学生后");
        return retVal;
    }
    
　　//返回通知
    public void doAfterReturning(JoinPoint jp){
        System.out.println("返回通知");
    }

　　//异常通知
    public void doAfterThrowing(JoinPoint jp,Throwable ex){
        System.out.println("异常通知");
        System.out.println("异常信息："+ex.getMessage());
    }
}