1、编写切面类
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package com.fz.annotation.aop;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
public class LogInterceptor {
public void before(){
System.out.println("方法之前执行....");
}
public void afterRutting(){
System.out.println("方法正常执行之后....");
}
public void afterThrowing(){
System.out.println("方法抛出异常之后....");
}
public void around(ProceedingJoinPoint pjp) throws Throwable{
System.out.println("方法执之前around......");
pjp.proceed();//向下继续方法的执行:(包括执行其他切面的拦截,如果当中抛出异常,则不会向下继续执行)
System.out.println("方法执之后around......");//这里会在@AfterReturning执行之后执行
}
}2、编写applicationContext.xml文件
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<?xml version="1.0" encoding="UTF-8"?>
xsi:schemaLocation="http://www.springframework.org/schema/beans
<context:annotation-config />
<context:component-scan base-package="com.fz.annotation" />
<bean id="logInterceptor" class="com.fz.annotation.aop.LogInterceptor">
</bean>
<aop:config>
<aop:pointcut
expression="execution(public void com.fz.annotation.service.impl.UserServiceImpl.userAdd(com.fz.xml.entity.User))"
id="servicePointcut" />
<aop:aspect id="logAspect" ref="logInterceptor">
<aop:before method="before" pointcut-ref="servicePointcut" />
</aop:aspect>
</aop:config>
</beans>
其中:<aop:pointcut>标签和<aop:aspect>同级,表示<aop:pointcut>是一个全局的pointcut
也可以让pointcut只供某一个逻辑使用,像下面这样写
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<aop:config>
<aop:aspect id="logAspect" ref="logInterceptor">
<aop:pointcut id="servicePointcut"
expression="execution(public void com.fz.annotation.service.impl.UserServiceImpl.userAdd(com.fz.xml.entity.User))"/>
<aop:before method="before" pointcut-ref="servicePointcut" />
</aop:aspect>
</aop:config>
还有可以这样写,注意:直接在before里写pointcut属性的时候需要将pointcut-ref属性去掉
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<aop:config>
<aop:aspect id="logAspect" ref="logInterceptor">
<aop:before method="before" pointcut="execution(public void com.fz.annotation.service.impl.UserServiceImpl.userAdd(com.fz.xml.entity.User))"/>
</aop:aspect>
</aop:config>