Spring AOP 基本的使用

1. jar包

　　

2.全局配置文件

<?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:context="http://www.springframework.org/schema/context"
    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/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

        </beans>

3.1使用bean 的方式配置

<?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:context="http://www.springframework.org/schema/context"
    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/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

       <bean id="before" class="com.aspect.Before"></bean>
       <bean id="tests" class="com.test.Tests"> </bean>
       <bean id="after" class="com.aspect.After"></bean>
       <bean id="final" class="com.aspect.Final"></bean>
       <bean id="exception" class="com.aspect.Exception"></bean>
        <aop:config>
            <aop:pointcut expression="execution(* com.test.Tests.say(*))" id="say"/><!-- 切入点 -->
            <aop:pointcut expression="execution(* com.test.Test.say1(*))" id="say1"></aop:pointcut>

            <aop:aspect ref="before">    <!-- 切入的方式（前后环异常最终）、方法 -->
                <aop:before method="dobefore" pointcut-ref="say"/>
            </aop:aspect>

            <aop:aspect ref="after">
                <aop:after-returning method="doafter" pointcut-ref="say" returning="obj"/>
            </aop:aspect>

            <aop:aspect ref="final">
                <aop:after method="dofinal" pointcut-ref="say"/>
            </aop:aspect>

        <!--     <aop:aspect ref="exception">
                <aop:after-throwing method="doexception" pointcut-ref="say" throwing="e"/>
            </aop:aspect> -->

        </aop:config>

        </beans>

　　在java中创建对应的 切入方法

3.2 使用注解配置

<?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:context="http://www.springframework.org/schema/context"
    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/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

   <context:component-scan base-package="com.aspect.auto"></context:component-scan>
       <aop:aspectj-autoproxy></aop:aspectj-autoproxy> 

        </beans>

创建对应的切入方法，并使用注解：如：

package com.aspect.auto;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

@Component
@Aspect
public class Around {

    @org.aspectj.lang.annotation.Around("within(com.aspect.auto.Says)")
    public void doAround(ProceedingJoinPoint jp){

        try {
            System.out.println("前置通知");
            jp.proceed();
            System.out.println(jp.proceed());
            System.out.println("后置通知");
        } catch (Throwable e) {
            System.out.println("异常通知："+e.getMessage());
        }

        System.out.println("最终通知");

    }
}

package com.aspect.auto;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

@Component
@Aspect
public class After {

    @AfterReturning(pointcut="execution(* com..*.say(*))",returning="ret")
    public void after(JoinPoint jp,Object ret){
        System.out.println("执行后置通知");
        System.out.println("获得返回值："+ret);
    }

}

测试 end