AOP原理

<aop:aspectj-autoproxy />声明自动为spring容器中那些配置@aspectJ切面的bean创建代理，织入切面。

<aop:aspectj-autoproxy />的proxy-target-class属性，默认为false，表示使用jdk动态代理织入增强。当配为<aop:aspectj-autoproxy  poxy-target-class="true"/>时，表示使用CGLib动态代理技术织入增强。如果proxy-target-class设置为false，但是目标类没有声明接口，则spring将自动使用CGLib动态代理。

解决方法

把<aop:aspectj-autoproxy/> 修改成<aop:aspectj-autoproxy proxy-target-class="true"/>

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