求助：OpenSessionInViewFilter

[tyrival]

Spring 4.1.7 + Struts 2.3.24 + Hibernate 4.3.10

启用lazy加载时，在struts2前面加上了openSessionInViewFilter，然后就报错，和没启用openSessionInViewFilter一样
请问怎么解决

<filter>
        <filter-name>openSessionInViewFilter</filter-name>
        <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>openSessionInViewFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

<filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

错误信息
Struts has detected an unhandled exception:
Messages:
net.vzhang.po.User_$$_javassist_0 cannot be cast to javassist.util.proxy.Proxy
File: org/hibernate/proxy/pojo/javassist/JavassistLazyInitializer.java
Line number: 147
Stacktraces
java.lang.ClassCastException: net.vzhang.po.User_$$_javassist_0 cannot be cast to javassist.util.proxy.Proxy

[tyrival]

自己解决了问题了