Spring中的AOP面向切面编程详解

<dependency>
  <groupId>org.aspectj</groupId>
  <artifactId>aspectjweaver</artifactId>
  <version>1.9.7</version>
</dependency>

<?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 ">
    <bean id="userAOP" class="com.ape.aop.UserAOP"/>
    <bean id="userService" class="com.ape.service.impl.UserServiceImpl"/>
    <!--  配置切面 -->
    <aop:config>
        <!--  定义切点    -->
        <aop:pointcut id="pointcut" expression="execution(* com.ape.service.impl.*.*(..))"/>
        <!--  增强  -->
        <aop:aspect ref="userAOP">
            <!-- 前置通知 -->
            <aop:before pointcut-ref="pointcut" method="beforeAdvice"/>
            <!-- 后置通知 -->
            <aop:after-returning pointcut-ref="pointcut" method="afterReturnAdvice"/>
            <!-- 环绕通知 -->
            <aop:around pointcut-ref="pointcut" method="aoundAdvice"/>
            <!-- 异常通知 -->
            <aop:after-throwing pointcut-ref="pointcut" method="afterThrowAdvice"/>
            <!-- 最终通知 -->
            <aop:after pointcut-ref="pointcut" method="afterAdvice"/>
        </aop:aspect>
    </aop:config>
</beans>

@Aspect
@Component
public class UserAOP {
    @Pointcut("execution(* com.ape.service.impl.*.*(..))")
    public void pointcut() {
    }
    @Before("pointcut()")
    public void beforeAdvice(JoinPoint point) {
        System.out.println("前置增强：" + point.getSignature().getName());
    }
}