请介绍一下News.java和Function.java是什么关系？为什么我修改了一下查询语句后只能显示第一页，第二页为空记录？

public String ArticleList(String toPage, String pageNum, String pageSize,String big) {
  try {
   Connection Conn = ConnDB.getConnection();   //获取数据库
   Statement stmt = Conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);    //创建数据库连接状态  
   ResultSet rs = null;        //创建结果集查询
   StringBuffer resultData = new StringBuffer();  //创建结果字符串集合
   String para="";
   if (!big.equals(null)||!big.eauals("")){
    para="and BigClassName='"+ big +"'";
   }
   
   int intPageNum=Integer.parseInt(pageNum);
   int ingPagesize=Integer.parseInt(pageSize);

/** 下行做了修改 **/
   String sSql = "select top "+ingPagesize+" NewsId,NewsTitle from News where NewsId not in(select top "+(ingPagesize * (intPageNum-1))+" NewsId from News where NewsId>0 "+ para +" order by NewsTime desc) "+ para +" order by NewsTime desc";//创建数据库查询语句
   //System.out.println(sSql);
   
   rs = stmt.executeQuery(sSql);       //执行数据库查询
   resultData=Fun.ArticleList(resultData,rs,toPage,pageNum, pageSize);  //获取返回分页结果
   rs.close();            //关闭结果集查询连接
   stmt.close();           //关闭数据库连接
   Conn.close();           //关闭数据库
   return resultData.toString();       //给前台返回结果集
  } catch (Exception e) {
   e.printStackTrace();
   return "No";           //若获取数据库失败，返回“No”
  }
 }