jasper-reports - 如何将小计放在多个 col 单元格中？

Question

如何将小计放在多个单元格中？

AggregationSubtotalBuilder totalBase = sbt.sum(total_, config.getColumn("base").getCol());
AggregationSubtotalBuilder member_count = sbt.text("Total Employes :", config.getColumn("code").getCol());               
jrb.subtotalsAtGroupFooter( emp_number_group, member_count, totalBase );

Answer 1

使用了一些技巧

Class ComponentPosition 
   private static void recalculateWidth(String name, DRDesignList list, int availableWidth) throws DRException {
for (int i=0;i<list.getListCells().size();i++) {
            DRDesignListCell listCell = list.getListCells().get(i); 
            DRDesignComponent component = listCell.getComponent();
            if (component instanceof DRDesignList){               
               for (DRDesignComponent cp : ((DRDesignList)component).getComponents()){
                  Integer colSpan = colSpans.get( cp.getName() );
                  if (colSpan!=null){                     
                     int w = 0;
                     for (int j=0;j<colSpan;j++){                        
                        w += list.getListCells().get(i+j).getComponent().getWidth();
                        list.getListCells().get(i+j).getComponent().setWidth(0);
                     }   
                     cp.setWidth(w);
                     component.setWidth(w);                                          
                  }                                       
               }            
            }
         }

然后ComponentPosition.colSpans.put(memeber_count.getName(), 3);