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;    }}