cxf 找不到类 RuntimeModelBuilder

jar包有，类在jaxb-impl.jar里面,但是一直说找不到类,网上也没有找到有相似的问题,大神们求科普

 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'isouthnetendpoint': Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class com.sun.xml.bind.v2.model.impl.RuntimeModelBuilder

这个配置引起的

 <jaxws:endpoint id="isouthnetendpoint" address="/ISCSyncService" implementor="cn.csg.soa.isc.ISCSyncServiceImpl">
        <jaxws:outInterceptors>
            <bean class="com.gdtopway.isc.tool.SoaInterceptor"/>
        </jaxws:outInterceptors>
        <jaxws:outFaultInterceptors>
            <bean class="com.gdtopway.isc.tool.ErrorSoaIntercetor"/>
        </jaxws:outFaultInterceptors>
    </jaxws:endpoint>

http://blog.csdn.net/FlyoFFox/article/details/51189911