Servlet和DAO代码如下所示:
@WebServlet("/ExcelExportController")
public class ExcelExportController extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public ExcelExportController() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
@SuppressWarnings("unchecked")
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
HttpSession session = request.getSession();
if (session != null) {
FileOutputStream fileOut;
List<LoanOffersDTO> loanOffersDTOs;
ExcelExportDAO excelExportDAO;
HSSFWorkbook hssfWorkbook;
if (session.getAttribute("loanOffers") != null) {
loanOffersDTOs = (List<LoanOffersDTO>) session
.getAttribute("loanOffers");
excelExportDAO = new ExcelExportDAOImpl();
hssfWorkbook = excelExportDAO
.createLoanOffersXls(loanOffersDTOs);
if (hssfWorkbook != null) {
fileOut = new FileOutputStream("report.xlsx");
response.setContentType("application/application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
response.setHeader("Content-Disposition",
"attachment; filename=report.xlsx");
hssfWorkbook.write(fileOut);
fileOut.flush();
fileOut.close();
} else {
}
}
}
}
}
public class ExcelExportDAOImpl implements ExcelExportDAO {
@Override
public HSSFWorkbook createLoanOffersXls(List<LoanOffersDTO> loanOffersDTOs) throws IOException {
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet("LoanOffer");
HSSFRow headRow = sheet.createRow(0);
headRow.createCell(0).setCellValue("Bank Name");
headRow.createCell(1).setCellValue("Offer Name");
headRow.createCell(2).setCellValue("Loan Officer");
headRow.createCell(3).setCellValue("Telephone");
headRow.createCell(4).setCellValue("Email");
headRow.createCell(5).setCellValue("Interest Rate");
headRow.createCell(6).setCellValue("Period");
headRow.createCell(7).setCellValue("Pre-Payment");
headRow.createCell(8).setCellValue("Installment");
headRow.createCell(9).setCellValue("Loan details");
HSSFRow dataRow;
int rowCount = 1;
for (LoanOffersDTO loanOffersDTO : loanOffersDTOs) {
dataRow = sheet.createRow(rowCount++);
dataRow.createCell(0).setCellValue(loanOffersDTO.getBankName());
dataRow.createCell(1).setCellValue(loanOffersDTO.getOfferName());
dataRow.createCell(2).setCellValue(
loanOffersDTO.getLoanOfficerName());
dataRow.createCell(3).setCellValue(
loanOffersDTO.getBankerContactNum());
dataRow.createCell(4)
.setCellValue(loanOffersDTO.getBankerEmailId());
dataRow.createCell(5).setCellValue(loanOffersDTO.getInterestRate());
dataRow.createCell(6).setCellValue(loanOffersDTO.getDuration());
dataRow.createCell(7).setCellValue(
loanOffersDTO.getPrePaymentValue());
dataRow.createCell(8).setCellValue(loanOffersDTO.getInstallments());
dataRow.createCell(9).setCellValue(
loanOffersDTO.getLoanDescription());
}
FileOutputStream fileOut = new FileOutputStream("C:\\Users\\Test\\Desktop\\report_"+Calendar.getInstance().getTimeInMillis()+".xls");
workbook.write(fileOut);
fileOut.flush();
fileOut.close();
return workbook;
}
}
摘要:
我有一个jsp,当它被提交时,上面的servlet / controller被调用。这个sevelet将创建excel文件并刷新Excel。这里使用“apache poi”创建excel文件。 在尝试打开它时,excel被创建并刷新,我看到错误“文件格式和report.xlsx的扩展名不匹配”。没有数据。但是如果我尝试将同一个文件刷新到某个特定位置,我就会完全收到该文件。 我甚至试过内容类型为“application / vnd.ms-excel”,但问题是一样的。 感谢
答案 0 :(得分:5)
你似乎有两个问题。一个是您正在使用HSSF代码生成.xls
个文件,但发送.xlsx
样式响应。其次,您将工作簿写入服务器上的文件,而不是将其发送回客户端!
我建议将代码更改为通用代码来处理这两种代码,例如
Workbook workbook;
....
workbook = excelExportDAO.createLoanOffersXls(loanOffersDTOs);
if (workbook != null) {
if (workbook instanceof HSSFWorkbook) {
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition",
"attachment; filename=report.xls");
} else {
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
response.setHeader("Content-Disposition",
"attachment; filename=report.xlsx");
}
OutputStream out = response.getOutputStream();
hssfWorkbook.write(out);
out.close();
}