Spring6.0从入门到精通-AOP之Advisor

AOP之Advisor

Advisor=Pointcut+Advice

/**
 * @author 周瑜
 */
public class AdviceDemo {

    public static void main(string[] args) {
        UserService target = new UserService();

        ProxyFactory proxyFactory = new ProxyFactory();
        proxyFactory.setTarget(target);
        proxyFactory.addAdvisor(new PointcutAdvisor() {
            @Override
            public Pointcut getPointcut() {
                return new StaticMethodMatcherPointcut() {
                    @Override
                    public boolean matches(Method method, Class<?> targetClass) {
                        return method.getName().equals("testAbc");
                    }
                };
            }

            @Override
            public Advice getAdvice() {
                return new MethodInterceptor() {
                    @Override
                    public Object invoke(MethodInvocation invocation) throws Throwable {
                        System.out.println("before...");
                        Object result = invocation.proceed();
                        System.out.println("after...");
                        return result;
                    }
                };
            }

            @Override
            public boolean isPerInstance() {
                return false;
            }
        });

        Userinterface userService = (UserInterface) proxyFactory.getProxy();
        userService.test();
    }
}

beanNameAutoProxyCreator，可以指定要代理的Bean的beanName，并设置切面逻辑

@Bean
public BeanNameAutoProxyCreator beanNameAutoProxyCreator() {
	BeanNameAutoProxyCreator beanNameAutoProxyCreator = new BeanNameAutoProxyCreator();
	beanNameAutoProxyCreator.setBeanNames("userSe*");
	beanNameAutoProxyCreator.setInterceptorNames("zhouyuAroundAdvice");
	beanNameAutoProxyCreator.setProxyTargetClass(true);

    return beanNameAutoProxyCreator;
}

DefaultAdvisorAutoProxyCreator是一个BeanPostProcessor，会在某个Bean的生命周期中去寻找和它匹配的Advisor，然后生成对应的代理对象作为Bean对象。

@Bean
public DefaultPointcutAdvisor defaultPointcutAdvisor(){
	NameMatchMethodPointcut pointcut = new NameMatchMethodPointcut();
	pointcut.addMethodName("test");

    DefaultPointcutAdvisor defaultPointcutAdvisor = new DefaultPointcutAdvisor();
	defaultPointcutAdvisor.setPointcut(pointcut);
	defaultPointcutAdvisor.setAdvice(new ZhouyuAfterReturningAdvice());

    return defaultPointcutAdvisor;
}

@Bean
public DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator() {
	
    DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator = new DefaultAdvisorAutoProxyCreator();

	return defaultAdvisorAutoProxyCreator;
}