$Proxy0 cannot be cast to com.performer.service.impl.PoeticJuggler

在测试Spring Aop时遇到如下异常：

Exception in thread "main" java.lang.ClassCastException: $Proxy0 cannot be cast to com.performer.service.impl.PoeticJuggler

 

代码如下所示：

package com.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.performer.service.Performer;
import com.performer.service.impl.Instrumentalist;
import com.performer.service.impl.PoeticJuggler;

public class SpringTest {
	public static void main(String []args) {
		ApplicationContext context = new ClassPathXmlApplicationContext("spring12.xml");
		
		PoeticJuggler p0 = (PoeticJuggler) context.getBean("duke");
		p0.perform();
		
		Instrumentalist p1 = (Instrumentalist) context.getBean("jake");
		p1.perform();
	}
}

 

解决办法：将p0和p1前面的类换成Performer，即接口的名字。

Performer p0 =   (Performer) context.getBean("duke");
p0.perform();
		
Performer p1 =   (Performer) context.getBean("jake");
p1.perform();

 

经验证，异常消失。

 

参考文章：

http://mopishv0.blog.163.com/blog/static/54455932200911118572079/