The hierarchy of the type AudienceAdvice is inconsistent 《spring in action》

在spring in action 的第四章aop在建议观众类时出现如下错误

- The hierarchy of the type AudienceAdvice is inconsistent 
- The type org.aopalliance.aop.Advice cannot be resolved. It is indirectly referenced from 
required .class files

原因是缺少

aopalliance-1.0.jar file

下载导入即可。