Junit4测试时候的问题

Question

public class DrawDao extends HibernateDaoSupport {

/**
 * 添加领用申请
 * 
 * @param draw
 *            领用申请信息(不可为null)
 * @return
 */
@SuppressWarnings("unchecked")
public boolean insertDraw(Carddrawapply draw, List<Carddrawapplydetail> drawdetailList) {
    boolean flag = false;
    Session session = null;
    Transaction tx = null;
    try {
        session = this.getSession();
        tx = session.beginTransaction();

        long shopid = MyConstant.HTDZ_DEFAULT_SHOPID;//商家ID
        String billtype = CardConstant.CARD_LY_ID;//业务编号
        String engshort = MyConstant.HTDZ_STR;//商家英文简称
        String busishort = CardConstant.CARD_LY_CODE;//业务英文简称

        String formcode = CardCode.getFormCode(session,shopid,billtype,engshort,busishort);
        if(!"".equals(formcode)){
            draw.setCarddrawapplycode(formcode);
            draw.setSourcetype("0");
            draw.setApplydate(MyFormat.getToday());
            draw.setStatus(StatusUtil.CARDDRAWAPPLY_STATUS01);
            session.save(draw);
            long carddrawapplyid = draw.getCarddrawapplyid();
            session.flush();
            if(drawdetailList.size()==0){
                tx.rollback();
            }else{
                for(Carddrawapplydetail drawdetail : drawdetailList){
                    if(drawdetail!=null){
                        drawdetail.setCarddrawapplyid(carddrawapplyid);
                        session.save(drawdetail);
                    }
                }
                tx.commit();
                flag = true;
            }
        }

    } catch (Exception e) {
        e.printStackTrace();
        tx.rollback();
        flag = false;
    } finally {
        session.close();
    }
    return flag;
}

}

以上Dao的方法已经正常。
对此方法的测试，我是在后期补上的。但是居然报错。帮我看看：

Junit4:(不用继承TestCase)

public class TestDrawDao{

private DrawDao drawDao;

@Before
public void setUp(){
    drawDao = new DrawDao();
}


/**
 * 测试'卡领用申请信息的添加'
 */
@Test
public void testInsertDraw(){
    Carddrawapply draw = new Carddrawapply();
    draw.setApplyoperid(1);
    draw.setApplydesc("申请说明");

    List<Carddrawapplydetail> drawdetailList = new ArrayList<Carddrawapplydetail>();

    //IC卡，100元面值的100张
    Carddrawapplydetail drawdetail1 = new Carddrawapplydetail();
    drawdetail1.setCardtype("1");
    drawdetail1.setParvalue(100);
    drawdetail1.setAmount(100);
    //充值卡，50元面值的50张
    Carddrawapplydetail drawdetail2 = new Carddrawapplydetail();
    drawdetail2.setCardtype("2");
    drawdetail2.setParvalue(50);
    drawdetail2.setAmount(50);

    drawdetailList.add(drawdetail1);
    drawdetailList.add(drawdetail2);

    boolean flag = drawDao.insertDraw(draw, drawdetailList);
    //断言
    Assert.assertEquals(true,flag);
}

}

异常如下:
java.lang.NullPointerException
at org.springframework.orm.hibernate3.support.HibernateDaoSupport.getSession(HibernateDaoSupport.java:142)
at com.htdz.card.admin.dao.DrawDao.insertDraw(DrawDao.java:35)

也就是调用到DrawDao里insertDraw()的这句时报错：session = this.getSession();

业务类里调用这个Dao都能正常使用，为什么从测试类里调用就报这个错误？
DrawDao继承了HibernateDaoSupport了啊。

Answer 1

当然了，
你junit里是drawDao = new DrawDao();
而业务类里是用spring把hibernate的sessionFactory注入给了DrawDao嘛，
你要这样
drawDao = 从spring里得到对应的DrawDao的bean