使用BeanNameAutoProxyCreator实现spring的自动

提到代理，我们可以使用ProxyBeanFactory，并配置proxyInterfaces,target和interceptorNames实现，但如果需要代理的bean很多，无疑会对spring配置文件的编写带来繁重的工作

Spring为我们提供了，根据beanName匹配后进行自动代理的解决方法

业务接口

package AutoProxyOne;

public interface Shopping {

public String buySomething(String type);

public String buyAnything(String type);

public String sellSomething(String type);

public String sellAnything(String type);

}

业务实现类A，作为配置文件中的buyBean：

package AutoProxyOne;

public class ShoppingImplA implements Shopping {

private Customer customer;

public Customer getCustomer() {

return customer;

}

public void setCustomer(Customer customer) {

this .customer = customer;

}

public String buySomething(String type) {

System.out.println( this .getCustomer().getName() + " bye " + type + " success " );

return null ;

}

public String buyAnything(String type) {

System.out.println( this .getCustomer().getName() + " bye " + type + " success " );

return null ;

}

public String sellAnything(String type) {

System.out.println( this .getCustomer().getName() + " sell " + type + " success " );

return null ;

}

public String sellSomething(String type) {

System.out.println( this .getCustomer().getName() + " sell " + type + " success " );

return null ;

}

业务实现类B，作为配置文件中的sellBean：

package AutoProxyOne;

public class ShoppingImplB implements Shopping {

private Customer customer;

public Customer getCustomer() {

return customer;

}

public void setCustomer(Customer customer) {

this .customer = customer;

}

public String buySomething(String type) {

System.out.println( this .getCustomer().getName() + " bye " + type + " success " );

return null ;

}

public String buyAnything(String type) {

System.out.println( this .getCustomer().getName() + " bye " + type + " success " );

return null ;

}

public String sellAnything(String type) {

System.out.println( this .getCustomer().getName() + " sell " + type + " success " );

return null ;

}

public String sellSomething(String type) {

System.out.println( this .getCustomer().getName() + " sell " + type + " success " );

return null ;

}

切面通知：

package AutoProxyOne;

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;

// 前置通知

public class WelcomeAdvice implements MethodBeforeAdvice {

public void before(Method method, Object[] args, Object obj)

throws Throwable {

System.out.println( " Hello welcome to bye " );

}

配置文件：

其中beanNames为buy*,意味着所有以buy开头的bean,都被spring容易自动代理，执行相应的切面通知

<? xml version="1.0" encoding="UTF-8" ?>

<! DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" >

< beans >

< bean id ="WelcomeAdvice" class ="AutoProxyOne.WelcomeAdvice" >

</ bean >

< bean class ="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator" >

< property name ="beanNames" >

< list >

< value > buy* </ value >

</ list >

</ property >

< property name ="interceptorNames" >

< list >

< value > WelcomeAdvice </ value >

</ list >

</ property >

</ bean >

< bean id ="buyBean" class ="AutoProxyOne.ShoppingImplA" >

< property name ="customer" >

< ref bean ="customer" />

</ property >

</ bean >

< bean id ="sellBean" class ="AutoProxyOne.ShoppingImplB" >

< property name ="customer" >

< ref bean ="customer" />

</ property >

</ bean >

< bean id ="customer" class ="AutoProxyOne.Customer" >

< constructor-arg index ="0" >

< value > gaoxiang </ value >

</ constructor-arg >

< constructor-arg index ="1" >

< value > 26 </ value >

</ constructor-arg >

</ bean >

</ beans >

测试代码：

在测试代码中，我们的buyBean打印两条买的信息，sellBean打印两条卖的信息，可以看到buyBean执行的方法已经进行了切面处理

需要注意的是，如果使用自动代码，则获得Spring Bean工厂要用

ApplicationContext ctx=new FileSystemXmlApplicationContext(filePath);

而不能用

BeanFactory factory=new XmlBeanFactory(new FileSystemResource(filePath));

原因我想是因为BeanFactory在初始化时并不实例化单例的Bean,而ApplicationContext则在初始化时候全部实例化了Bean,自动代理需要在初始化时候定义好代理关系

package AutoProxyOne;

import java.io.File;

import org.springframework.beans.factory.BeanFactory;

import org.springframework.beans.factory.xml.XmlBeanFactory;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.FileSystemXmlApplicationContext;

import org.springframework.core.io.FileSystemResource;

import org.springframework.aop.support.RegexpMethodPointcutAdvisor;

public class TestAdvisor {

public static void main(String[] args) {

String filePath = System.getProperty( " user.dir " ) + File.separator + " AutoProxyOne " + File.separator + " hello.xml " ;

BeanFactory factory = new XmlBeanFactory( new FileSystemResource(filePath));

ApplicationContext ctx = new FileSystemXmlA

使用BeanNameAutoProxyCreator实现spring的自动代理

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