<h:dataTable value='#{outdata.rs}' var='item'>
<h:column>
<h:outputText value='#{name}'/>
</h:column>
<h:column>
<h:outputText value='#{code}'/>
</h:column>

 public   class  outdata {
....
ResultSet rs =  null ;
  
 public  ioutdata() { 
....
rs = stmt.executeQuery(SQL);
....
}

 public  outdata() { 
.....
     try  {
....
    	rs = stmt.executeQuery(SQL);
.........

     }
      catch  (Exception e)      {
        e.printStackTrace();
     }
      finally       {
  //      if (rs != null) try { rs.close(); } catch(Exception e) {}
         if  (stmt !=  null )  try  { stmt.close(); }  catch (Exception e) {}
         if  (con !=  null )  try  { con.close(); }  catch (Exception e) {}
     }
..............
}