jsp + oracle翻页

今天写了个利用oracle sql在jsp页面进行分页。具体实现核心代码如下：

// 声明分页变量并初始化
     // 当前页码值,最小索引值:1
     int  pageNo  =   1 ;
     // 每页面显示的资讯条数(行数)
     int  row  =   10 ;
     // 最大显示页数
     int  MAX_PAGE_NUM = 20 ;
     // 最大每页显示条数
     int  MAX_ROWCOUNT = 20 ;
    
     // 从请求中获取分页变量的值
    String reqNo = request.getParameter( " pageNo " );
    String reqRow = request.getParameter( " row " );
     if ( ! StringUtils.isEmpty(reqNo)  &&  NumberUtils.isNumber(reqNo)  &&  Integer.parseInt(reqNo) > 1 ) ... {
        //分页数不超过 MAX_PAGE_NUM 页，若需要超过 MAX_PAGE_NUM 页，则修改 MAX_PAGE_NUM
        if(Integer.parseInt(reqNo)<=MAX_PAGE_NUM)
            pageNo=Integer.parseInt(reqNo);
        else
            pageNo=MAX_PAGE_NUM;
    }
     if ( ! StringUtils.isEmpty(reqRow)  &&  NumberUtils.isNumber(reqRow)  &&  Integer.parseInt(reqRow) > 1 ) ... {
        //每页显示的条目在 MAX_ROWCOUNT 行以内,若需要超过 MAX_ROWCOUNT 行，则修改 MAX_ROWCOUNT
        if(Integer.parseInt(reqRow)<=MAX_ROWCOUNT)
            row=Integer.parseInt(reqRow);
        else
            row=MAX_ROWCOUNT;
    }
    
     int  startNum = (pageNo  -   1 )  *  row;

 以上代码嵌入在jsp页面里，然后sql语句如下：

List list = service.executeQuery(" select  kpj,spj,zd  from  ( select  kpj,spj,zd,ROWNUM R  from  gazx.qhhq  where  pz  like   ' %"+param+"% '   and "  +
                    " zhxgrq = ( select   max (zhxgrq)  from  gazx.qhhq)  and  scbz = 0   and  gkbz = 1   and  rownum <= " + (startNum + row) + ")  where  R > " + startNum + "");

 接下来进行分页联接：

                     // 处理分页链接
                     if (pageNo < MAX_PAGE_NUM)
                        out.println( " <a href='qhList.jsp? " + paras + " &amp;pageNo= " + (pageNo + 1 ) + " &amp;row= " + row + " '>下页</a>&nbsp; " );
                     if (pageNo > 1 )
                        out.println( " <a href='qhList.jsp? " + paras + " &amp;pageNo= " + (pageNo - 1 ) + " &amp;row= " + row + " '>上页</a>&nbsp; " );
                    out.println( " <a href='qhList.jsp? " + paras + " &amp;pageNo=1&amp;row= " + row + " '>首页</a>&nbsp; " );
                    out.println( " <a href='qhList.jsp? " + paras + " &amp;pageNo= " + MAX_PAGE_NUM + " &amp;row= " + row + " '>末页</a><br/> " );
                    out.println( " 第 " + pageNo + " / " + MAX_PAGE_NUM + " 页<br/> " );