（八）基于XML的AOP开发---Spring简明快速入门学习

<?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.itheima</groupId>
    <artifactId>Spring_day03_01_AOP</artifactId>
    <version>1.0-SNAPSHOT</version>

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

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>

</project>

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

    <!--3.开启AOP命名空间-->
    <bean id="userService" class="com.itheima.service.impl.UserServiceImpl"/>
    <!--2.配置共性功能成功spring控制的资源-->
    <bean id="myAdvice" class="com.itheima.aop.AOPAdvice"/>

    <!--4.配置AOP-->
    <aop:config>
        <!--5.配置切入点-->
        <aop:pointcut id="pt" expression="execution(* *..*(..))"/>
        <!--6.配置切面（切入点与通知的关系）-->
        <aop:aspect ref="myAdvice">
            <!--7.配置具体的切入点对应通知中那个操作方法-->
            <aop:before method="function" pointcut-ref="pt"/>
        </aop:aspect>
    </aop:config>

</beans>

package com.itheima.service;

public interface UserService {
    public void save();
}

package com.itheima.service.impl;

import com.itheima.service.UserService;

public class UserServiceImpl implements UserService {

    public void save(){
        //0.将共性功能抽取出来
        //System.out.println("共性功能");
        System.out.println("user service running...");
    }

}

package com.itheima.aop;
//1.制作通知类，在类中定义一个方法用于完成共性功能
public class AOPAdvice {

    public void function(){
        System.out.println("共性功能 增强");
    }
}

import com.itheima.service.UserService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AOPTest {

    @Autowired
    private UserService userService;

    @Test
    public void test1(){
        userService.save();
    }


}

表达式语法

通知的类型

通知的语法

示例

知识要点总结