public Object getValueAt(int rowIndex, int columnIndex) {
        PaidVo paidVo = paidVoList.get(rowIndex);
        switch (columnIndex) {
            case 0:
                return paidVo.getName();
            case 1:
                return paidVo.getFruitName();
            case 2:
                return paidVo.getCreateAt();
            case 3:
                return paidVo.getShouldPaid();
            case 4:
                return paidVo.getHadPaid();
            case 5:
                return paidVo.getShouldPaid() - paidVo.getHadPaid();
            default:
                return "";
        }
    }