Viewing specific rows only

Question

hi,
is there a way to only view certain rows in a resultset, i wanted to add a 1 out of 10 pages link on a jsp or servlet page along with the data that fits into that page. but i don't want to have to loop through the entire resultset picking out only what i need, is there a way to tell the resultset to only give me back rows 10-20 for example, if the resultant query returns 100 rows, if it depends on the database, i might be using access or mysql?
i tried the jdbc forum a few days ago and got no response, any ideas here?
Thank you

Answer 1

I agree with the others that extracting all the data from the ResultSet into a collection is the way to go. It has the added benefit of not tying up db resources while your user is looking at data.
The way I have done this is to create a class called DataGrid, which is basically just a wrapper around a List of Lists. I created another class called ResultSetConverter that can create a DataGrid from a ResultSet. (ResultSetConverter actually extends DataGrid).
DataGrids can be displayed as a table by a GridView object. GridView has a toHtmlTable() method that will create the table and return it as a String. GridView has a subclass called PaginatedView that has properties like pageSize(), currentPage(), next(), previous(), etc, that allow viewing of one page of data at a time, and navigation thru those pages.
So the code to use this would look like:
    class DataGrid {....
    class ResultSetConverter extends DataGrid {...
    class GridView { ...
    class PaginatedView extends GridView {...
    ResultSet rs = getResultSetFromSomewhere();
    DataGrid  grid = new ResultSetConverter( rs );
    PaginatedView view = new PaginagedView( grid );
    view.setPageSize( 10 );
    String table = view.toHtmlTable();