SpringAOP实践-优快云博客

本文介绍了一个具体的Spring AOP（面向切面编程）应用实例。通过定义`GreetingAroundAdvice`类实现了方法拦截器，该类在目标方法调用前后分别执行自定义的前置和后置操作。使用Spring框架配置了代理工厂Bean来创建代理对象，并在主方法中演示了如何通过应用程序上下文获取并调用代理对象的方法。

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在spring实现

import org.aopalliance.intercept.MethodInvocation;

/**
 * Created by dingshuangkun on 2018/1/9.
 */
public class GreetingAroundAdvice implements MethodInterceptor {

    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
        before();
        Object obj =  invocation.proceed();
        after();
        return obj;
    }

    public void before(){
        System.out.println("----before----");
    }
    public void after(){
        System.out.println("----after------");
    }
}

<bean id="greetingImpl" class="aop.impl.GreetingImpl"/>
<bean id="greetingAroundAdvice" class="aop.GreetingAroundAdvice"/>
<bean id="greetingProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="interfaces" value="aop.Greeting"/>
    <property name="target" ref="greetingImpl"/>
    <property name="interceptorNames" >
        <list>
            <value>greetingAroundAdvice</value>
        </list>
    </property>
</bean>

测试

public static void main(String[] arges){
    ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    Greeting greeting =(Greeting) ac.getBean("greetingProxy");
    greeting.sayHello("ding");
    greeting.sayNiHao("dingding");
}

------before-------
hello ding
------after--------
------before-------
niHao dingding
------after--------

转载于:https://my.oschina.net/u/3218528/blog/1604609