【Spring】- 接口代理、类代理

墨蓝 2022-10-02 09:51 218阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

Spring通过接口代理能提高程序代码的灵活性，接口代理的四个步骤：

*  配置被代理的目标类
 *  配置通知
 *  配置通知的作用切入点
 *  配置接口的代理对象(Spring默认为接口代理)

配置：

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    	xmlns:tx="http://www.springframework.org/schema/tx"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    				http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
    				http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
    
    
    <bean id="targetObject" class="com.zhiwei.target.TargetObject">
    	<property name="name" value="name"/>
    </bean>
    
    
    <bean id="myAdvice" class="com.zhiwei.advice.MyAdvice"/>
    
    
     <bean id="beforAdvicePacket" class="org.springframework.aop.support.NameMatchMethodPointcutAdvisor">
     <property name="advice" ref="myAdvice"/>
     <property name="mappedNames">
    	 <list>
    	 	<value>sayHello</value>
    	 </list>
     </property>
     </bean>
    
    
    <bean id="proxyObject" class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="proxyInterfaces"> 
    	<list>
    		<value>com.zhiwei.target.TargetInter</value>
    		<value>com.zhiwei.target.TargetInter01</value>
    	</list>
    </property>
    <property name="target" ref="targetObject"/>  
    <property name="interceptorNames"> 
    	<list>
    		<value>beforAdvicePacket</value>
    	</list>
    </property>
    <property name="proxyTargetClass" value="true"/>
    </bean>
    </beans>

目标对象：

package com.zhiwei.target;
    public class TargetObject implements TargetInter ,TargetInter01{
        
    	private String name;
    	
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	@Override
    	public void sayHello() {
    
    		System.out.println("Hello "+name);
    	}
    
    	@Override
    	public void sayBye() {
    		System.out.println("Bye "+name);
    	}
    
    }

目标对象实现接口：

package com.zhiwei.target;
    
    public interface TargetInter01 {
      public void sayBye();
    }

package com.zhiwei.target;
    
    public interface TargetInter {
    	
    	public void sayHello();
    }

测试类：

package com.zhiwei.target;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import com.zhiwei.target.TargetInter;
    import com.zhiwei.target.TargetInter01;
    import com.zhiwei.target.TargetObject;
    
    
    public class TestAOP {
    
    	public static void main(String[] args) {
    		
    		ApplicationContext ac=new ClassPathXmlApplicationContext("com/zhiwei/target/applicationContext.xml");
    		
    		//使用IOC容器里里面的代理对象，默认接口代理
    		TargetInter ti=(TargetInter) ac.getBean("proxyObject");
    		System.out.println("默认接口代理");
    		ti.sayHello();
    	
    		//因为是接口代理，接口指向同一个目标对象：	TargetInter01 ti01=(TargetInter01) ac.getBean("proxyObject");
    		TargetInter01 ti01=(TargetInter01) ti;
    		ti01.sayBye();
    		
    		//IOC配置开启类代理
    		TargetObject to=(TargetObject) ac.getBean("proxyObject");
    		System.out.println("\n\nIOC配置为类代理");
    		to.sayHello();
    		to.sayBye();
    	}
    }

结果：

![c93b3ca489cabe2504489f008e99557d391.jpg][]

转载于:https://my.oschina.net/yangzhiwei256/blog/3017096

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220113/0b4a36f3e29c4f12af34ea57b0afe15c.png
[c93b3ca489cabe2504489f008e99557d391.jpg]: /images/20220113/114426393a654d67903ae60686f4cab3.png