public TransEntruckBill getBill(String id) {
try {
TransEntruckBill bill = dataServer.findBill(id);
return bill;
} catch (NullPointerException e) {
System.out.println("目标单据不存在！");
return null;
}
}
public TransEntruckBill makeBill(Message message, Iterator<String> orderList) {
for (int i = 0; i < message.length(); i++) {
if (message.getInform(i).equals("")) {
return null;
}
}
TransEntruckBill bill = new TransEntruckBill(message, orderList);
double fee = calculator.calculateFee(bill);
bill.setPayment(fee);
dataServer.addBill(bill);
approver.addBill(bill.submit());
return bill;
}