AOP学习

beans.xml文件如下:

<?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-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">

    <context:annotation-config />
    <context:component-scan base-package="com.lx"/>
    <aop:aspectj-autoproxy/>

</beans>

-------------------------------------------------------------------------------------

类 UserDaoImpl.java文件

package com.lx.aspect;

import org.springframework.stereotype.Component;

@Component
public class UserDaoImpl {
    public void saveUser(){
     System.out.println("userSave刘健明");
    }
}

------------------------------------------------------------------------------------------

类 LogUser.java文件

package com.lx.aspect;

import javax.annotation.PostConstruct;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class LogUser {
 @Pointcut("execution(public * com.lx.aspect.*.*(..))")
 public void userSaveBefore(){}
 
 @Before("userSaveBefore()") /*注意: userSaveBefore后面的括号一定要加上*/
    public void beforeUser(){
     System.out.println("beforeUser");
    }
}