关于在DWZ使用ssh后台查询的几种方式

1.查询所有记录，并以列表形式查询

DaoImpl

 public PageBean queryByPage(String hql, List<Object> listobj, int pageSize, int page) {
         try {
             SQLQuery query = this.getHibernateTemplate().getSessionFactory().getCurrentSession().createSQLQuery(hql);
             final int offset = PageBean.countOffset(pageSize, page);
             final int length = pageSize;            

             for(int i =0;i <listobj.size();i++) {
                 if(listobj.get(i) instanceof java.sql.Date) {
                     query.setDate(i,(Date)listobj.get(i));
                 }else {
                     query.setParameter(i,listobj.get(i));
                 }
             }

             query.setFirstResult(offset);
             query.setMaxResults(length);
             List list = query.list();

             List<ZdwhModel> listbd=new ArrayList<ZdwhModel>();
             ZdwhModel obj=null;
             Object  arrobj[]=null;
             for(int i=0;i<list.size();i++){
                 arrobj=(Object[])list.get(i);
                 obj=new ZdwhModel();
                 BigDecimal decimal = (BigDecimal) arrobj[0];
                 obj.setId(decimal.longValue());
                 obj.setDic_type((String)arrobj[6]);
                 obj.setItem_code((String)arrobj[2]);
                 obj.setItem_name((String)arrobj[3]);
                 obj.setMemo((String)arrobj[4]);
                 listbd.add(obj);
             }
             //count
             String countHql="select count(*)   "+hql.substring(hql.indexOf("from"),hql.indexOf("order"));
             query=null;
             query = this.getHibernateTemplate().getSessionFactory().getCurrentSession().createSQLQuery(countHql);

             for(int i =0;i <listobj.size();i++) {
                 if(listobj.get(i) instanceof java.sql.Date) {
                     query.setDate(i,(Date)listobj.get(i));
                 }else {
                     query.setParameter(i,listobj.get(i));
                 }
             }

             List listcount = query.list();  

             int allRow = ((BigDecimal)listcount.get(0)).intValue();
             final int currentPage = PageBean.countCurrentPage(page);

              int totalPage = PageBean.countTotalPage(pageSize, allRow);//
             PageBean pageBean = new PageBean();
             pageBean.setPageSize(pageSize);
             pageBean.setAllRow(allRow);
             pageBean.setTotalPage(totalPage);
             pageBean.setCurrentPage(currentPage);
             pageBean.setList(listbd);
             pageBean.init();
             return pageBean; 

         } catch (Exception e) {
             e.printStackTrace();
         }
         return null;
     }

ServiceImpl

    public String getHql(Map<String, Object> map,List<Object> listobj){
        String hql = "";
        hql+=" order by id";
        return hql;
    }

    public PageBean queryForPage(int pageSize, int page,Map<String, Object> map){
        List<Object> listobj = new ArrayList<Object>();
        String hql = getHql(map, listobj);
        PageBean pageben = zdwhdao.queryByPage(hql, listobj, pageSize, page);
        return pageben;
    }
    

2.预处理查询、并且查询结果 当确定返回的实例只有一个或者null时 用uniqueResult()方法

 public UserModel islogin(String dwdm,String uname, String upwd) {
         String hql="from UserModel where uname=? and upwd=? and dwdm=?";
         Query query=this.getHibernateTemplate().getSessionFactory().getCurrentSession().createQuery(hql);
         query.setString(0, uname);
         query.setString(1, upwd);
         query.setString(2, dwdm);
         return(UserModel)query.uniqueResult();
     }