Spring创建AroundAdvice实例

Posted 2022-03-22 schangxiang

     AroundAdvice

        1、在方法之前和之后来执行相应的操作

        2、实现MethodInterceptor接口

 

接口文件：

 

public interface IHello 
   public void sayHello(String str);

public class Hello implements IHello 
    @Override
    public void sayHello(String str) 
    	System.out.println("你好"+str);
    

 

　　SayAroundAdvice文件：

public class SayAroundAdvice implements MethodInterceptor 

	@Override
	public Object invoke(MethodInvocation arg0) throws Throwable 
		// TODO Auto-generated method stub
		Object result=null;
		
		System.out.println("Around在方法执行前做事情！");
		
		result=arg0.proceed();
		
		System.out.println("Around在方法执行后做事情！");
		
		return result;
	

　　Main文件:

public class MainTest 

	public static void main(String[] args) 
		// TODO Auto-generated method stub
	    ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
	    
	    IHello hello=(IHello)context.getBean("helloProxy");
	    hello.sayHello("访客");
	

　　

applicationContext.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" 
"http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
    <!-- 建立目标对象实例 -->
	<bean id="bean_hello" class="com.pb.Hello" />
	<!-- 创建Around advice实例 -->
	<bean id="ssd" class="com.pb.SayAroundAdvice" />
	<!-- 建立代理对象 -->
	<bean id="helloProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
	    <!-- 设置代理的接口 -->
	    <property name="proxyInterfaces">
			<value>com.pb.IHello</value>
		</property>
		<!-- 设置目标对象实例 -->
		<property name="target">
			<ref bean="bean_hello"/>
		</property>
		<!-- 设置Advice实例 -->
		<property name="interceptorNames">
			<list>
			 	 <value>ssd</value>
			</list>
		</property>
	</bean>
</beans>

　　执行效果：