用jUnit测试正确可是 用main方法测试就为空指针解决方法

public class Test {    public static void main(String[] args) {        ClazzDao cd = new ClazzDaoImpl();        String hqlQuery = "from Clazz";        String hqlCount = "select count(*) from  Clazz";        PageModel<Clazz> pageModel = cd.get(hqlQuery, hqlCount, 1, 10);        for (Clazz c : pageModel.getList()) {            System.out.println("班级名称"+c.getName());        }        System.out.println("总记录:" + pageModel.getTotalRecords());        System.out.println("总页数:" + pageModel.getTotalPages());        System.out.println("第一页:" + pageModel.getTopPageNo());        System.out.println("前一页:" + pageModel.getPreviousPageNo());        System.out.println("下一页:" + pageModel.getNextPageNo());        System.out.println("最后一页:" + pageModel.getBottomPageNo());        }    }package com.aftvc.dao.impl;import java.sql.SQLException;import java.util.ArrayList;import java.util.List;import javax.annotation.Resource;import org.hibernate.HibernateException;import org.hibernate.Query;import org.hibernate.Session;import org.springframework.orm.hibernate3.HibernateCallback;import org.springframework.orm.hibernate3.HibernateTemplate;import org.springframework.stereotype.Component;import com.aftvc.dao.ClazzDao;import com.aftvc.model.Clazz;import com.aftvc.util.PageModel;import com.aftvc.vo.ClazzInfo;@Component("clazzDao")public class ClazzDaoImpl implements ClazzDao {    private HibernateTemplate hibernateTemplate;    public HibernateTemplate getHibernateTemplate() {        return hibernateTemplate;    }    @Resource    public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {        this.hibernateTemplate = hibernateTemplate;    }    @SuppressWarnings("unchecked")    public PageModel<Clazz> get(final String hqlQuery, final String hqlCount,            final int pageNo, final int pageSize) {        List<Clazz> clazzs = hibernateTemplate                .executeFind(new HibernateCallback() {                    public Object doInHibernate(Session session)                            throws HibernateException, SQLException {                        Query query = session.createQuery(hqlQuery)                                .setFirstResult((pageNo - 1) * pageSize)                                .setMaxResults(pageSize);                        return query.list();                    }                });        int totalRecords = getCount(hqlCount);        PageModel<Clazz> pageModel = new PageModel<Clazz>(totalRecords, pageNo,                pageSize, clazzs);        return pageModel;    }    @SuppressWarnings("unchecked")    private int getCount(String hql) {        List<Long> count = (List<Long>) hibernateTemplate.find(hql);        if (count != null && count.size() > 0)            return ((Long) count.get(0)).intValue();        return 0;    }}