16.Aop--非注解实现

Book类（buy方法将被设置为切入点）

package package2;

public class Book {
    public void buy(){
        System.out.println("buy...");
    }
}

BookProxy类（BookProxy类将被设置为切面容器，before将被设为通知）

package package2;

public class BookProxy {
    public  void  before(){
        System.out.println("before...");
    }
}

bean2.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: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.xsd
                           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
                            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--创建对象-->
    <bean id="book" class="package2.Book"></bean>
    <bean id="bookProxy" class="package2.BookProxy"></bean>

<!--配置aop增强-->
    <aop:config>
        <!--切入点,命名为p-->
        <aop:pointcut id="p" expression="execution(* package2.Book.buy())"/>
        <!--配置切面（配置存在增强方法的类）：将通知（增强方法）应用到切入点-->
        <aop:aspect ref="bookProxy">
            <!--定义通知（增强）-->
            <aop:before method="before" pointcut-ref="p"></aop:before>
        </aop:aspect>
    </aop:config>
</beans>

Test类

public class MyTest {
 
    @Test
    public void testAopXml(){
        ApplicationContext context=
                new ClassPathXmlApplicationContext("bean2.xml");
        Book book = context.getBean("book", Book.class);
       book.buy();
    }
}

测试结果

before...
buy...