实现类似spring的可配置的AOP框架，配置文件的问题！

package cn.itcast.day3.aopframework;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import cn.itcast.day3.Advice;
public class BeanFactory {
Properties props = new Properties();
public BeanFactory(InputStream ips)
{
try {
props.load(ips);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public Object getBean(String name)
{
String className = props.getProperty(name);
Object bean = null;
try {
Class clazz = Class.forName(className);
bean = clazz.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
if(bean instanceof ProxyFactoryBean)
{
Object proxy = null;
ProxyFactoryBean proxyFactoryBean = (ProxyFactoryBean)bean;
try {
Advice advice =(Advice)Class.forName(props.getProperty(name+".advice")).newInstance();
Object target = Class.forName(props.getProperty(name+".target")).newInstance();;
proxyFactoryBean.setAdvice(advice);
proxyFactoryBean.setTarget(target);
proxy = proxyFactoryBean.getProxy();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return proxy;
}
return bean;
}
}

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package cn.itcast.day3.aopframework;
import java.io.InputStream;
public class AopFrameworkTest {
/**
* @param args
*/
public static void main(String[] args)throws Exception {
// TODO Auto-generated method stub
InputStream ips = AopFrameworkTest.class.getResourceAsStream("config.properties");
Object bean = new BeanFactory(ips).getBean("xxx");
System.out.println(bean.getClass().getName());
}
}

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上面是报告有错的代码。

这是报告的错误：

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