Spring动态代理
定义自定义切面 – diyNodePoint
package com.lxc.diy; import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before; /** * @Aspect 标注这个了是一个切面 * @Before("切入点") === <aop:before method="beforeLog" pointcut-ref="point" /> * @After("切入点") === <aop:after method="afterLog" pointcut-ref="point" /> */@Aspectpublic class diyNotePoint { @Before("execution(* com.lxc.service.UserServiceImp.*(..))") public void before() { System.out.println("前置切面"); } @After("execution(* com.lxc.service.UserServiceImp.*(..))") public void after() { System.out.println("后置切面"); }}
定义接口 – UserService
package com.lxc.service; public interface UserService { public void query(); public void delete(); public void edit(); public void add();}
重写接口类 – UserServiceImp
package com.lxc.service;public class UserServiceImp implements UserService{ @Override public void query() { System.out.println("query"); } @Override public void delete() { System.out.println("delete"); } @Override public void edit() { System.out.println("edit"); } @Override public void add() { System.out.println("add"); }}
beans.xml中配置：
<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" 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"> <!--定义bean--> <bean id="imp" class="com.lxc.service.UserServiceImp"/> <bean id="diyNotePoint" class="com.lxc.diy.diyNotePoint" /> <!--添加：注解支持--> <aop:aspectj-autoproxy /> </beans>
测试：
import com.lxc.service.UserService;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext; public class Test { public static void main(String[] args) { ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml"); UserService userService = ctx.getBean("imp", UserService.class); userService.add(); }}
输出如下：
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