spring aop简单实现

1.导入额外的两个jar包：

2.编写接口：Helloworld

package com.xuzhiwen.test5;

public interface Helloworld {
    public void printHelloworld();
    public void printGoodBye();
}

3.编写类实现接口：HelloworldImpl1

package com.xuzhiwen.test5;

public class HelloworldImpl1 implements Helloworld{

    @Override
    public void printHelloworld() {
        System.out.println("HelloworldImpl1.printHelloworld");
    }

    @Override
    public void printGoodBye() {
        System.out.println("HelloworldImpl1.printGoodBye");
    }
}

4.编写类实现接口：HelloworldImpl2

package com.xuzhiwen.test5;

public class HelloworldImpl2 implements Helloworld{

    @Override
    public void printHelloworld() {
        System.out.println("HelloworldImpl2.printHelloworld");
    }

    @Override
    public void printGoodBye() {
        System.out.println("HelloworldImpl2.printGoodBye");
    }

}

5.编写日子类：TimeHandler

package com.xuzhiwen.test5;

public class TimeHandler {
    public void printTime(){
        System.out.println("time = " + System.currentTimeMillis());
    }
}

6.编写配置文件：aop.xml

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    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-4.3.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">
        
        <bean id="helloworldImpl1" class="com.xuzhiwen.test5.HelloworldImpl1" />
        <bean id="helloworldImpl2" class="com.xuzhiwen.test5.HelloworldImpl2" />
        <bean id="timeHandler" class="com.xuzhiwen.test5.TimeHandler" />
        
        <aop:config>
            <aop:aspect id="time" ref="timeHandler">
                <aop:pointcut id="addAllMethod" expression="execution(* com.xuzhiwen.test5.*.*(..))" />
                <aop:before method="printTime" pointcut-ref="addAllMethod" />
                <aop:after method="printTime" pointcut-ref="addAllMethod" />
            </aop:aspect>
        </aop:config>
</beans>

7.编写测试类：Test

package com.xuzhiwen.test5;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {
    
    @org.junit.Test
    public void test(){
        ApplicationContext app = new ClassPathXmlApplicationContext("aop.xml");
        Helloworld hello1 = (Helloworld) app.getBean("helloworldImpl1");
        hello1.printHelloworld();
        hello1.printGoodBye();
        System.out.println("--------------------------------------------");
        Helloworld hello2 = (Helloworld) app.getBean("helloworldImpl2");
        hello2.printHelloworld();
        hello2.printGoodBye();
    }
}

8.运行结果如下：