Java怎么实现多层动态代理（优雅的方式）

用cglib两层代理后会报错

Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(Hello.class);  
enhancer.setCallback(new TestAop());  
Hello hello = (Hello)enhancer.create();

Enhancer enhancer1 = new Enhancer();
enhancer1.setSuperclass(hello.getClass());  
enhancer1.setCallback(new TestAop()); 
Hello hello2 = (Hello)enhancer1.create();
System.out.println(hello2.getClass());
hello2.dd();

报错

 at net.sf.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:413)
    at net.sf.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:336)
    ... 12 more
Caused by: java.lang.ClassFormatError: Duplicate method name&signature in class file tk/tankpao/blast/util/Hello$$EnhancerByCGLIB$$59850fd3$$EnhancerByCGLIB$$2199b39
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    ... 18 more

有没类似的方式实现多层代理（优雅，cglib类似的工具库已经提供了多层代理的功能）。
通过往一个切面里织入多次代码，也能实现多次代理，但是本人觉得不够优雅。

看了下spring的源码，直接通过cglib多层代理是不行的，spring也是通过编码的方式实现多层代理的。
根据具体类方法上切面配置，选取制定代理回调进行多层代理。

 enhancer.setSuperclass(proxySuperClass);
            enhancer.setInterfaces(AopProxyUtils.completeProxiedInterfaces(this.advised));
            enhancer.setNamingPolicy(SpringNamingPolicy.INSTANCE);
            enhancer.setStrategy(new ClassLoaderAwareUndeclaredThrowableStrategy(classLoader));

            Callback[] callbacks = getCallbacks(rootClass);
            Class<?>[] types = new Class<?>[callbacks.length];
            for (int x = 0; x < types.length; x++) {

http://blog.csdn.net/heyutao007/article/details/49738887 看一下

```xml
<bean id="empolye" class="com.autowired.Empolye"/>
    <bean id="performanceInterceptor" class="com.autowired.PerformanceMethodInterceptor"/>
    <bean id="secondIntercepterDemo" class="com.autowired.SecondIntercepterDemo"/>
    <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
        <property name="beanNames">
            <list>
                <value>empolye</value>
            </list>
        </property>
        <property name="interceptorNames">
            <list>
                <value>performanceInterceptor</value>
                <value>secondIntercepterDemo</value>
            </list>
        </property>
        <property name="proxyTargetClass">
            <value>true</value>
        </property>
        <property name="exposeProxy">
            <value>true</value>
        </property>
    </bean>

interceptorNames是一个list 可实现多层代理 performanceInterceptor和SecondIntercepterDemo分别实现MethodInterceptor接口
```