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();
    }