spring中junit 提示Failed to load ApplicationContext

错误提示： 1：java.lang.IllegalStateException: Failed to load ApplicationContext

　　　　2：Error creating bean with name 'userService' defined in class path resource [UserService.xml]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Cannot proxy target class because CGLIB2 is not available. Add CGLIB to the class path or specify proxy interfaces.

　　　　3：Cannot proxy target class because CGLIB2 is not available. Add CGLIB to the class path or specify proxy interfaces.

根本原因：由于web在加载spring的配置文件（applicationContext.xml）时，发生了错误，而错误是3（cglib2不可用），所以根本原因是缺少cglib的包。

applicationContext.xml中的代理配置如下：

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

   <tx:advice id="txAdvice" transaction-manager="transactionManager">
       <tx:attributes>
           <tx:method name="*" />
       </tx:attributes>
   </tx:advice>
   
   <aop:config proxy-target-class="true">
       <aop:pointcut id="serviceMethod" expression=" execution(* com.luxl.service..*(..))" />
       <aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice" />
   </aop:config>

解决方法：在maven中添加cglib的包，如下：

　　<dependency>
        <groupId>cglib</groupId>
        <artifactId>cglib</artifactId>
        <version>2.2.2</version>
    </dependency>

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spring中junit 提示Failed to load ApplicationContext

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