pointcut（切断点）表达式：
- execution(public * *(..))
- execution(* set*(..))
- execution(* com.xyz.service.AccountService.*(..))
- execution(* com.xyz.service..(..))
- execution(* com.xyz.service...(..))
- within(com.xyz.service.*) (only in Spring AOP)
- within(com.xyz.service..*) (only in Spring AOP)
- this(com.xyz.service.AccountService) (only in Spring AOP)
- ....
execution用于匹配方法执行的连接点
举几个例子：
- execution(public * *(..)) 切入点为执行所有public方法时
- execution(* set*(..)) 切入点为执行所有set开始的方法时
- execution(* com.xyz.service.AccountService.*(..)) 切入点为执行AccountService类中所有方法时
- execution(* com.xyz.service..(..)) 切入点为执行com.xyz.service包下的所有方法时
- execution(* com.xyz.service...(..)) 切入点为执行com.xyz.service包及其子包下的所有方法时
- within(com.xyz.service.*) (only in Spring AOP)
- within(com.xyz.service..*) (only in Spring AOP) within 用于匹配制定类型内的执行方法
- this(com.xyz.service.AccountService) (only in Spring AOP) this 用于匹配当前AOP代理对象类型的执行方法
其他
- target(com.xyz.service.AccountService) (only in Spring AOP) target 用于匹配当前目标对象类型的执行方法
- args(java.io.Serializable) (only in Spring AOP) args 用于匹配当前执行的方法传入的参数为指定类型的执行方法
基于注解的匹配
- @target(org.springframework.transaction.annotation.Transactional) (only in Spring AOP)
- @within(org.springframework.transaction.annotation.Transactional) (only in Spring AOP)
- @annotation(org.springframework.transaction.annotation.Transactional) (only in Spring AOP)
- @args(com.xyz.security.Classified) (only in Spring AOP)
实现：
<aop:config><aop:pointcut id="businessService" expression="execution(* com.aop.schema..(..))"></aop:pointcut>
</aop:config>
例子：
新建两个类
package com.aop.schema;
/*** * 切面类**/
public class MyAspect {}
package com.aop.schema;/*** * 业务类**/
public class ApsectBiz {}
XML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:aop="http://www.springframework.org/schema/aop"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.1.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.1.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-4.1.xsd"><bean id="myAspect" class="com.aop.schema.MyAspect"></bean><bean id="apsectBiz" class="com.aop.schema.ApsectBiz"></bean><aop:config><aop:aspect id="myAspectAOP" ref="myAspect"><aop:pointcut id="myPointcut" expression="execution(* com.aop.schema.ApsectBiz.*(..))" /></aop:aspect></aop:config></beans>
