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public List<Paging> pagingList(String sql,int pageNum,int pageSize,int pageSum){
//获取要显示的记录数
ResultSet rs = con.executeQuery(sql+"limit "+((pageNum-1)*pageSize)+","+pageSize);
List<Paging> pageList=new ArrayList<Paging>();
while (rs.next()) {
?????????
pageList.add(????);
}
return pageList;
}