BeanNameAutoProxyCreater学习笔记

1. 编写切面实现

   @Slf4j
   @Component("myMethodInterceptor")
   public class MyMethodInterceptor implements MethodInterceptor {
          
       @Override
       public Object invoke(MethodInvocation invocation) throws Throwable {
          
           log.info("调用方法前");
           Object ret=invocation.proceed();
           log.info("调用方法后");
           return ret;
       }
   }
   

2. 要创建代理的目标类与接口

   public interface UserService {
          
       void print();
   }
   @Slf4j
   @Service("userService")
   public class UserServiceImpl implements UserService {
          
       public void print(){
          
           log.info("hello busi");
       }
   }
   

3. 编写配置类

   @ComponentScan("com.yicj.study.common")
   public class AppConfig {
          
       //使用BeanNameAutoProxyCreator来创建代理
       @Bean
       public BeanNameAutoProxyCreator beanNameAutoProxyCreator(){
          
           BeanNameAutoProxyCreator beanNameAutoProxyCreator=new BeanNameAutoProxyCreator();
           //设置要创建代理的那些Bean的名字
           beanNameAutoProxyCreator.setBeanNames("userSer*");
           //设置拦截链名字(这些拦截器是有先后顺序的)
           beanNameAutoProxyCreator.setInterceptorNames("myMethodInterceptor");
           return beanNameAutoProxyCreator;
       }
   }
   

4. 测试

   @SpringBootApplication(exclude = AopAutoConfiguration.class)
   public class BeanNameAutoProxyApp implements ApplicationRunner {
          
       @Autowired
       private UserService userService ;
       public static void main(String[] args) {
          
           SpringApplication.run(BeanNameAutoProxyApp.class, args) ;
       }
       @Override
       public void run(ApplicationArguments args) throws Exception {
          
           userService.print();
       }
   }
   

5. 结果输出

   c.y.s.common.advice.MyMethodInterceptor  : 调用方法前
   c.y.s.c.service.impl.UserServiceImpl     : hello busi
   c.y.s.common.advice.MyMethodInterceptor  : 调用方法后
   

6. 备注

   BeanNameAutoProxyCreator,DefaultAdvisorAutoProxyCreator,AbstractAdvisorAutoProxyCreator，
   @EnableAspectJAutoProxy注解通过@Import将AnnotationAwareAspectJAutoProxyCreator类注册到容器