AspectJ基于XML的AOP实现

切面

//切面
public class MyAspect {

    public void myBefore() {
        System.out.println("执行前置方法");
    }

    public void myBefore(JoinPoint jp) {
        System.out.println("执行前置方法jp="+jp);
    }

    public void myAfterReturning(String result) {
        System.out.println("执行后置方法 result="+result);
    }

    public Object myAround(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("执行环绕通知方法，目标方法执行之前");
        //目标方法
        Object result = pjp.proceed();
        System.out.println("执行环绕通知方法，目标方法执行之后");
        if(result != null) {
            result = ((String)result).toUpperCase();
        }
        return result;
    }

    public void myAfterThrowing(UsernameException ex) {
        System.out.println("发生用户名异常:"+ex.getMessage());
    }

    public void myAfterThrowing(PasswordException ex) {
        System.out.println("发生密码异常:"+ex.getMessage());
    }

    public void myAfterThrowing(Exception ex) {
        System.out.println("发生其它异常:"+ex.getMessage());
    }

    public void myAfter() {
        System.out.println("执行最终通知");
    }


}

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.xsd"> 

        <!-- 注册切面 -->
        <bean id="myAspect" class="com.siyantu.xml.MyAspect"></bean>

         <!-- 注册实现类 -->
        <bean id="someService" class="com.siyantu.xml.SomeServiceImpl" />

        <!-- AOP配置 -->
        <aop:config>
                <!-- 定义切入点 -->
                <aop:pointcut expression="execution(* *..ISomeService.doFirst(..))" id="doFirstPointcut"/>
                <aop:pointcut expression="execution(* *..ISomeService.doSecond(..))" id="doSecondPointcut"/>
                <aop:pointcut expression="execution(* *..ISomeService.doThird(..))" id="doThirdPointcut"/>

                <aop:aspect ref="myAspect">
                    <!-- 前置通知 -->
                    <aop:before method="myBefore" pointcut-ref="doFirstPointcut" />
                    <!-- 指定参数类型 -->
                    <aop:before method="myBefore(org.aspectj.lang.JoinPoint)" pointcut-ref="doFirstPointcut" />

                    <!-- 后置通知 -->
                    <aop:after-returning method="myAfterReturning" pointcut-ref="doSecondPointcut" returning="result" />

                    <!-- 环绕通知 -->
                    <aop:around method="myAround(org.aspectj.lang.ProceedingJoinPoint)" pointcut-ref="doSecondPointcut" />

                    <!-- 异常通知 -->
                    <aop:after-throwing method="myAfterThrowing(com.siyantu.xml.UsernameException)" pointcut-ref="doThirdPointcut" throwing="ex" />
                    <aop:after-throwing method="myAfterThrowing(com.siyantu.xml.PasswordException)" pointcut-ref="doThirdPointcut" throwing="ex" />
                    <aop:after-throwing method="myAfterThrowing(java.lang.Exception)" pointcut-ref="doThirdPointcut" throwing="ex" />

                    <!-- 最终通知 -->
                    <aop:after method="myAfter" pointcut-ref="doThirdPointcut" />

                </aop:aspect>

        </aop:config>

</beans>