struts 学习问题

 1.Exception creating bean of class Book

struts-config.xml 为：

<struts-config>
      <form-beans>
        <form-bean name="bookForm" type="Book"/>     
      </form-beans>
      <global-forwards>
        <forward   name="bookCreated"  path="/BookView.jsp"/>       
      </global-forwards>

      <action-mappings>
        <action path="/createBook"  type="BookAction" name="bookForm" scope="request" input="/CreateBook.jsp">
       
         </action>
      </action-mappings>
    </struts-config>

由于Book未extends ActionForm引起的