struts2+spring+hibernate整合有关问题 Dao注入异常

Error creating bean with name 'bookDao' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'sessionFactory' of bean class [org.dao.imp.BookDaoImp]: Bean property 'sessionFactory' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'sessionFactory' of bean class [org.dao.imp.BookDaoImp]: Bean property 'sessionFactory' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

<!-- 对dao进行依赖注入 -->
    <bean id="bookDao" class="org.dao.imp.BookDaoImp">
         <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    
    <!--对service进行依赖注入Dao  -->
    <bean id="bookService" class="org.service.imp.BookServiceImp">
         <property name="bookDao" ref="bookDao"></property>
    </bean>
    
    <!-- 对action进行注入 -->
    <bean id="bookAction" class="org.action.BookAction">
         <property name="bookService" ref="bookService"></property>
    </bean>

public class BookDaoImp extends HibernateDaoSupport implements BookDao{

    public D101 selectBook2(String d10145) {
        List list=this.getHibernateTemplate().find("from D101 where d10145=?",d10145);
        D101 d101=null;
        if(list.size()>0){
            d101=(D101) list.get(0);
        }
        return d101;
    }  
}

public class BookServiceImp implements BookService{
    private BookDao bookDao;
    
    
    public BookDao getBookDao() {
        return bookDao;
    }


    public void setBookDao(BookDao bookDao) {
        this.bookDao = bookDao;
    }


    public D101 selectBook2(String d10145) {
        return bookDao.selectBook2(d10145);
    }

}

  public class BookAction extends ActionSupport{
    private D101 d101;
    private BookService bookService;
        
    public D101 getD101() {
        return d101;
    }

    public void setD101(D101 d101) {
        this.d101 = d101;
    }

    public BookService getBookService() {
        return bookService;
    }

    public void setBookService(BookService bookService) {
        this.bookService = bookService;
    }


    public String selectBook(){
        D101 b=bookService.selectBook2(d101.getD10145());
        if (b!=null) {
            Map session=ActionContext.getContext().getSession();
            session.put("d101", b);
        }
        return SUCCESS;
    }
}