java模拟atm系统

File file = new File(".\\datafiles\\ATM.xls"); //构造输入流 try { FileOutputStream fos = new FileOutputStream(file); //创建可写的工作簿 WritableWorkbook wb = Workbook.createWorkbook(fos); WritableSheet sheet = wb.createSheet("ATM", 0); //先写表头 for (int i = 0; i < vTitle.size(); i++) { Label c = new Label(i, 0, vTitle.get(i).toString()); sheet.addCell(c); } //写数据 for (int i = 0; i < vData.size(); i++) { Vector line = (Vector) vData.get(i); for (int j = 0; j < line.size(); j++) { Label c = new Label(j, i, line.get(j).toString()); sheet.addCell(c); String stuSave = txtSave.getText(); String id = FrmATM.account; System.out.println(line); String Name = line.get(0).toString(); if (Name.equals(id)) { String Check = line.get(2).toString(); Check += stuSave; vData.add(Check); } } wb.write(); //保存文件 } //关闭工作簿和输出流 wb.close(); fos.close(); } catch (Exception ex) { System.out.println(ex.getMessage()); } }