1)切入点表达式:可以对指定的"方法"进行拦截,从而给指定的类生成代理对象.
2)写法:
<?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:p="http://www.springframework.org/schema/p" 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"> <!-- dao实例 --> <bean id="userDao" class="com.bighuan.g_pointcut.UserDao"></bean> <bean id="orderDao" class="com.bighuan.g_pointcut.OrderDao"></bean> <!-- 切面类 --> <bean id="aop" class="com.bighuan.g_pointcut.Aop"></bean> <!-- Aop配置 --> <aop:config> <!-- 定义一个切入点表达式,拦截哪些方法 --> <!-- <aop:pointcut expression="execution(* com.bighuan.g_pointcut.*.*(..))" id="pt"/> --> <!-- 拦截所有公共方法 --> <!-- <aop:pointcut expression="execution(public * *(..))" id="pt"/> --> <!-- 拦截所有set开头的方法:execution(* set*(..)) --> <!-- <aop:pointcut expression="execution(* set*(..))" id="pt"/> --> <!-- 拦截指定类的指定方法,拦截时一定要定位到指定方法 --> <!-- <aop:pointcut expression="execution(* com.bighuan.g_pointcut.UserDao.save(..))" id="pt"/> --> <!-- <aop:pointcut expression="execution(public * com.bighuan.g_pointcut.UserDao.save(..))" id="pt"/> --> <!-- 拦截指定类的所有方法 --> <!-- <aop:pointcut expression="execution(* com.bighuan.g_pointcut.UserDao.*(..))" id="pt"/> --> <!-- 拦截指定包及其子包下的所有方法 --> <!-- <aop:pointcut expression="execution(* com..*(..))" id="pt"/> --> <!-- <aop:pointcut expression="execution(* com..*.*(..))" id="pt"/> --> <!-- 多个表达式:或有意义,且就无意义了 --> <!-- <aop:pointcut expression="execution(* com.bighuan.g_pointcut.UserDao.save(..)) || execution(* com.bighuan.g_pointcut.OrderDao.*(..))" id="pt"/> --> <!-- <aop:pointcut expression="execution(* com.bighuan.g_pointcut.UserDao.save(..)) or execution(* com.bighuan.g_pointcut.OrderDao.*(..))" id="pt"/> 同上--> <!-- 去非值 --> <aop:pointcut expression="!execution(* com.bighuan.g_pointcut.OrderDao.*(..))" id="pt"/> <!-- 切面类 --> <aop:aspect ref="aop"> <!-- 环绕通知--> <aop:around method="around" pointcut-ref="pt"/> </aop:aspect> </aop:config> </beans>