项目中需要一个提供Excel数据展示下载功能，用于并不是list数据展示，无法通过for来实现。只能通过硬编码实现每一个cell。该Excel数据展示一共用到了四种样式，所以创建了4中style。
最终实现的效果如下：
//查询payment，数据源。用于绑定数据到Excel
RfPayment rfPayment=rfFinanceManager.findRfPaymentById(shopCode, paymentId);
XSSFWorkbook workbook = null;
byte[] bytes=null;
try{
workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.createSheet("sheet名称");
//设置字体
XSSFFont font = workbook.createFont();
//字体大小
font.setFontHeightInPoints((short) 14);
//字体
font.setFontName("宋体");
//加粗
font.setBold(true);
//颜色
font.setColor(IndexedColors.BLACK.index);
/** 标题样式 */
XSSFCellStyle styleTitle = workbook.createCellStyle();
styleTitle.setFont(font);
//文字居中
styleTitle.setAlignment(HorizontalAlignment.CENTER);
/** 通用样式 */
XSSFCellStyle styleAuto = workbook.createCellStyle();
styleAuto.setFont(font);
//文字左对齐
styleAuto.setAlignment(HorizontalAlignment.LEFT);
/** 通用样式 带下划线 */
XSSFCellStyle styleAutoMedium = workbook.createCellStyle();
styleAutoMedium.setFont(font);
//文字左对齐
styleAutoMedium.setAlignment(HorizontalAlignment.LEFT);
//粗下划线
styleAutoMedium.setBorderBottom(BorderStyle.MEDIUM);
/** 通用样式 边框黑色 */
XSSFCellStyle styleAutoThin = workbook.createCellStyle();
styleAutoThin.setFont(font);
//文字左对齐
styleAutoThin.setAlignment(HorizontalAlignment.LEFT);
//粗下划线
styleAutoThin.setBorderTop(BorderStyle.THIN);
styleAutoThin.setBorderBottom(BorderStyle.THIN);
styleAutoThin.setBorderLeft(BorderStyle.THIN);
styleAutoThin.setBorderRight(BorderStyle.THIN);
/** 店铺名称样式 */
XSSFCellStyle styleShop = workbook.createCellStyle();
styleShop.setFont(font);
//文字左对齐
styleShop.setAlignment(HorizontalAlignment.LEFT);
//背景黄色
styleShop.setFillForegroundColor(IndexedColors.YELLOW.index);//前景颜色
styleShop.setFillPattern(FillPatternType.SOLID_FOREGROUND);//填充方式，前色填充
//第一行第一列为标题
//第一行第一列到第四列合并
sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 3));
XSSFRow row = sheet.createRow(0);
XSSFCell cell = row.createCell(0);
cell.setCellValue("网银退款申请书");
cell.setCellStyle(styleTitle);
row = sheet.createRow(1);
cell = row.createCell(0);
cell.setCellValue("部门:");
cell.setCellStyle(styleAuto);
cell = row.createCell(1);
// 店铺名称
SalesEntity salesEntityParam = new SalesEntity();
salesEntityParam.setCode(rfPayment.getShopCode());
List<SalesEntity> salesEntities = salesEntityManager.findListByParam(salesEntityParam);
cell.setCellValue(!CollectionUtils.isEmpty(salesEntities) ? salesEntities.iterator().next().getName() : rfPayment.getShopCode());
cell.setCellStyle(styleShop);
cell = row.createCell(2);
cell.setCellValue("费用代码:");
cell.setCellStyle(styleAuto);
cell = row.createCell(3);
cell.setCellValue("");
cell.setCellStyle(styleAutoMedium);
row = sheet.createRow(2);
cell = row.createCell(0);
cell.setCellValue("退款单创建日期:");
cell.setCellStyle(styleAuto);
cell = row.createCell(1);
cell.setCellValue(rfPayment.getRefundCreateTimeString().substring(0, 10));
cell.setCellStyle(styleAutoMedium);
row = sheet.createRow(3);
cell = row.createCell(0);
cell.setCellValue("导出日期:");
cell.setCellStyle(styleAuto);
cell = row.createCell(1);
cell.setCellValue(DateFormatHelper.dateToStr(new Date(), "yyyy-MM-dd"));
cell.setCellStyle(styleAutoMedium);
row = sheet.createRow(4);
cell = row.createCell(0);
cell.setCellValue("姓名:");
cell.setCellStyle(styleAuto);
cell = row.createCell(1);
cell.setCellValue(userName);//
cell.setCellStyle(styleAutoMedium);
cell = row.createCell(2);
cell.setCellValue("员工代码:");
cell.setCellStyle(styleAuto);
cell = row.createCell(3);
cell.setCellValue(jobNumber);//
cell.setCellStyle(styleAutoMedium);
row = sheet.createRow(6);
cell = row.createCell(0);
cell.setCellValue("付款对象:");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellValue(rfPayment.getPayee());
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(7);
cell = row.createCell(0);
cell.setCellValue("退款申请编码：");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellValue(rfPayment.getRfDocNo());
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellValue("付款原由：");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellValue(sysConfigInit.getSysConfigValue(SysConfigConstants.RF_TYPE, rfPayment.getRefundCategory()));
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(8);
cell = row.createCell(0);
cell.setCellValue("OMS订单号：");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellValue(rfPayment.getOrderDocNo());
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellValue("相关退货单号：");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellValue(rfPayment.getRefundCategory().equals(Constants.STRING_NUMBER_3)?"":rfPayment.getRoDocNo());
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(9);
cell = row.createCell(0);
cell.setCellValue("平台订单编号：");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellValue(rfPayment.getPfDocNo());
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(10);
cell = row.createCell(1);
cell.setCellValue("支付金额(元)");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellValue("备注");
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(11);
cell = row.createCell(0);
cell.setCellValue("退款单总金额");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellValue(MoneryTransition.number2CNMontrayUnit(rfPayment.getPayTotal()));
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellValue("￥"+rfPayment.getPayTotal().setScale(2, BigDecimal.ROUND_FLOOR).toString());
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellValue("");
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(12);
cell = row.createCell(0);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(13);
cell = row.createCell(0);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(14);
cell = row.createCell(0);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(15);
cell = row.createCell(0);
cell.setCellValue("银行转帐(户名)");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellValue(rfPayment.getPayee());
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(16);
cell = row.createCell(0);
cell.setCellValue("(银行帐号)");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellValue(rfPayment.getAccount());
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(17);
cell = row.createCell(0);
cell.setCellValue("(银行名称)");
cell.setCellStyle(styleAutoThin);
cell = row.createCell(1);
cell.setCellValue(rfPayment.getBank());
cell.setCellStyle(styleAutoThin);
cell = row.createCell(2);
cell.setCellStyle(styleAutoThin);
cell = row.createCell(3);
cell.setCellStyle(styleAutoThin);
row = sheet.createRow(19);
cell = row.createCell(0);
cell.setCellValue("申请人:");
cell.setCellStyle(styleAuto);
cell = row.createCell(1);
cell.setCellValue(rfPayment.getRefundCreateUser().equals(Long.valueOf("-666"))?"系统创建":omsUserManager.findUserById(Long.valueOf(rfPayment.getRefundCreateUser())).getUserName());
cell.setCellStyle(styleAutoMedium);
cell = row.createCell(2);
cell.setCellValue("日期:");
cell.setCellStyle(styleAuto);
cell = row.createCell(3);
cell.setCellValue(rfPayment.getRefundCreateTimeString().substring(0, 10));
cell.setCellStyle(styleAutoMedium);
row = sheet.createRow(20);
cell = row.createCell(0);
cell.setCellValue("部门主管:");
cell.setCellStyle(styleAuto);
cell = row.createCell(1);
cell.setCellStyle(styleAutoMedium);
cell = row.createCell(2);
cell.setCellValue("日期:");
cell.setCellStyle(styleAuto);
cell = row.createCell(3);
cell.setCellStyle(styleAutoMedium);
row = sheet.createRow(21);
cell = row.createCell(0);
cell.setCellValue("财务总监:");
cell.setCellStyle(styleAuto);
cell = row.createCell(1);
cell.setCellStyle(styleAutoMedium);
cell = row.createCell(2);
cell.setCellValue("日期:");
cell.setCellStyle(styleAuto);
cell = row.createCell(3);
cell.setCellStyle(styleAutoMedium);
row = sheet.createRow(22);
cell = row.createCell(0);
cell.setCellValue("总经理:");
cell.setCellStyle(styleAuto);
cell = row.createCell(1);
cell.setCellStyle(styleAutoMedium);
cell = row.createCell(2);
cell.setCellValue("日期:");
cell.setCellStyle(styleAuto);
cell = row.createCell(3);
cell.setCellStyle(styleAutoMedium);
for (int i = 0; i < 4; i++){
//宽度自适应
sheet.autoSizeColumn(i);
}
ByteArrayOutputStream os = new ByteArrayOutputStream();
workbook.write(os);
bytes = os.toByteArray();
//保存文件到服务器 ，由于不需要保存到本地，所以注释这段了
// File file = new File("D://" + System.currentTimeMillis() + ".xlsx");
// FileOutputStream out = new FileOutputStream(file);
// workbook.write(out);
// out.close();
}catch (EncryptedDocumentException e){
// TODO Auto-generated catch block
e.printStackTrace();
}catch (IOException e){
// TODO Auto-generated catch block
e.printStackTrace();
}catch (Exception e){
e.printStackTrace();
String uuid = UUID.randomUUID().toString();
logger.error(String.format("导出退款申请书", uuid), e.getMessage());
throw new RuntimeException(String.format("退款支出明细编辑", uuid), e);
}finally {
try{
workbook.close();
}catch (IOException e){
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//记录导出次数
rfPaymentExportSchemesManager.insertExportNum(rfPayment);
//下载文件
String fileNmae = System.currentTimeMillis() + ".xlsx";
HttpHeaders headers = new HttpHeaders();
headers.setContentDispositionFormData("attachment", new String(fileNmae.getBytes("UTF-8"), "iso-8859-1"));
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
ResponseEntity<byte[]> entity = new ResponseEntity<byte[]>(bytes, headers, HttpStatus.CREATED);
return entity;
poi 的jar包使用的是。3.12版本