使用BeanNameAutoProxyCreator创建代理

BeanNameAutoProxyCreator是自动代理创建器的三种(BeanNameAutoProxyCreator,DefaultAdvisorAutoProxyCreator,AbstractAdvisorAutoProxyCreator)之一.它是根据拦截器和设置的Bean的名称表达式做匹配来创建代理.下面是个例子
1.主要依赖(略)

2.声明一个环绕通知(拦截器)

public class MyMethodInterceptor implements MethodInterceptor {
    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
        System.out.println(getClass()+"调用方法前");
        Object ret=invocation.proceed();
        System.out.println(getClass()+"调用方法后");
        return ret;
    }
}

 

public interface UserService {
    void print();
}
public class UserServiceImpl implements UserService {
    public void print(){
        System.out.println(getClass()+"#print");
    }
}

@Configuration
public class AppConfig {
    //要创建代理的目标Bean
    @Bean
    public UserService userService(){
        return new UserServiceImpl();
    }
    //创建Advice或Advisor
    @Bean
    public Advice myMethodInterceptor(){
        return new MyMethodInterceptor();
    }
    //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;
    }
}

public class Main {
    public static void main(String[] args) {
        ApplicationContext applicationContext=new AnnotationConfigApplicationContext(AppConfig.class);
        UserService userService= applicationContext.getBean(UserService.class);
        userService.print();
    }
}