javaAop

 

javaAop

Maven

 

 

 

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<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

​

    <groupId>com.chexd</groupId>

    <artifactId>master</artifactId>

    <packaging>pom</packaging>

    <version>1.0-SNAPSHOT</version>

    <modules>

        <module>spring_test</module>

    </modules>

​

    <properties>

        <maven.compiler.source>11</maven.compiler.source>

        <maven.compiler.target>11</maven.compiler.target>

    </properties>

​

    <dependencies>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>4.12</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>5.3.3</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-aop</artifactId>

            <version>5.3.3</version>

        </dependency>

        <dependency>

            <groupId>org.aspectj</groupId>

            <artifactId>aspectjrt</artifactId>

            <version>1.8.9</version>

        </dependency>

​

​

    </dependencies>

​

 

 

</project>

 

 

 

 

xml设置

 

 

 

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<?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:p="http://www.springframework.org/schema/p"

       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/aop

       http://www.springframework.org/schema/aop/spring-aop.xsd

       http://www.springframework.org/schema/context

       http://www.springframework.org/schema/context/spring-context.xsd">

    <!--配置自动扫描包-->

    <context:component-scan base-package="com.chexd.spring"/>

    <aop:aspectj-autoproxy/>

​

</beans>

 

 

 

接口

 

 

 

 

 

 

 

 

public interface UserDao {

    void add();

}

 

 

 

实现类

 

 

 

 

 

 

 

 

@Component("user")

public class User implements UserDao {

    public void add(){

        System.out.println("User的方法");

    }

}

 

 

 

切面

 

 

 

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@Aspect

@Component

public class UserAspect {

​

    @Before("execution(* com.chexd.spring.User.add(..))")

    public void aa(){

        System.out.println("发");

    }

}

 

 

 

测试类

 

 

 

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    @Test

    public void testUser(){

        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

        UserDao user = (UserDao) context.getBean("user");

        user.add();

    }