Struts2 HTTP Status 500 - Unable to instantiate Action

Question

报错信息HTTP Status 500 - Unable to instantiate Action, org.ssh.product.action.ProductAction, defined for 'product_save' in namespace '/'org.ssh.product.action.ProductAction我的模型是package org.ssh.product.action; …… @Controller  //将这个action交给spring管理 @Scope("prototype") //作用域 为多实例 public class ProductAction extends ActionSupport { ……我的struts.xml是   <package name="product" extends="struts-default" namespace="/"  strict-method-invocation="false">         <!-- 保存商品 -->         <action name="product_save" class="org.ssh.product.action.ProductAction" method="{1}Product">             <result>WEB-INF/view/index.jsp</result>             <result name="input">WEB-INF/view/index.jsp</result>         </action>     </package>我的spring 开启自动扫描了<context:component-scan base-package="org.ssh.*"/>我的web.xml    <!-- 配置Struts2过滤器 -->     <filter>         <filter-name>struts2</filter-name>         <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>     </filter>     <filter-mapping>         <filter-name>struts2</filter-name>         <url-pattern>/*</url-pattern>     </filter-mapping>           <!-- 配置Spring的监听器 -->     <listener>         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>     </listener>     <!-- 指定Spring配置文件所在路径 -->     <context-param>         <param-name>contextConfigLocation</param-name>         <param-value>classpath:applicationContext.xml</param-value>     </context-param>