Spring 动态代理（三）

BeanNameAutoProxyCreator

BeanNameAutoProxyCreator可以根据bean的名字来代理对象，它是通过BeanPostProcessor实现的，在bean初始化之后代理对象。它的父类AbstractAutoProxyCreator实现了BeanPostProcessor的postProcessAfterInitialization方法，内部是使用ProxyFactory根据bean的名字和interceptorNames生成对象的代理。

举例

接口

public interface People {    public void eat();}

实现类

public class Student implements People {    private String name;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @Override    public void eat() {        System.out.println(this.getName() + " is eating");    }    @Override    public String toString() {        return "Student{" +                "name='" + name + '\'' +                '}';    }}

方法拦截

public class MyMethodInterceptor implements MethodInterceptor {    @Override    public Object invoke(MethodInvocation methodInvocation) throws Throwable {        System.out.println("--------before method interceptor---------");        Object object = methodInvocation.proceed();        System.out.println("----------after method interceptor----------");        return object;    }}

配置文件

 <bean id="student" class="com.lilongjiu.study.spring.aop.aposrc.Student">        <property name="name" value="zhangsan"></property>    </bean>    <bean id="myMethodInterceptor" class="com.lilongjiu.study.spring.aop.aposrc.MyMethodInterceptor"></bean>    <bean id="myBeanNameAutoProxyCreator" class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">        <property name="beanNames">            <list>                <value>student</value>            </list>        </property>        <property name="interceptorNames">            <list>                <value>myMethodInterceptor</value>            </list>        </property>    </bean>

main方法

public class Demo {    public static void main(String[] args) throws Exception {        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");        People people = (People) applicationContext.getBean("student");        people.eat();    }}

输出

--------before method interceptor---------zhangsan is eating----------after method interceptor----------

Spring 动态代理（一） - 代理模式

Spring 动态代理（二） - ProxyFactoryBean

Spring 动态代理（三） - BeanNameAutoProxyCreator

Spring 动态代理（四）- 动态代理核心类 - ProxyCreatorSupport

Spring 动态代理（五） - 自定义BeanTypeAutoProxyCreator